4. PERONOSPORALES

ALBUGINACEAE

Cystopus austro-africanus (Syd.) Sacc. & Trott.

Sacc. Syll. Fung. XXIV (1926) 33.

Albugo austro-africanus Syd., H. & P. Sydow (1912 c) 437.

Cystopus austro-africanus (Syd.) Wakefield (1927) 244.

on Aizoon rigidum Linn., Humewood, Doidge, 1234, Kew.

Cystopus bliti de Bary

Sacc. Syll. Fung. VII : 236; Wakefield (1927) 246 ; Hopkins (1939 a) 4. Cystopus amaranthi Berk. (?) Kalchbrenner (1882 b) 27.

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on Achyranthes aspera Linn., Garstfontein, Pienaar, 1205, 1310, Kew, and Doidge, 1477, Kew ; Duivelskloof, Doidge, 20334, Kew.

Achyranthes sp., Salisbury, Hopkins.

Amaranthus angustifolius Lam., Somerset East, MacOwan 1320, 20808.

Cyathula globulifera Moq., Somerset East, MacOwan 1313, 21990 (de Thuem. Myc. Univ. 1512), also ex Herb. Kalchbr. Kew; Garstfontein, Pienaar, 1268, Kew.

Cystopus candidus (Pers.) de Bary

Kalchbrenner (1882 b) 27 ; Sacc. Syll. Fung. VII : 234 ; Wakefield (1927) 243; Doidge & Bottomley (1931) 30, 54, 64 ; Verwoerd (1931 a) 298.

Albugo candida (Pers.) O. Kuntze, van der Byl (1922 d) 283 ; Nel (1942) 8 ; Cardoso (1945) 155.

Albugo candida f. heliophilae Hennings (1898) 293.

on Armoracia rusticana Gaertn., Constantia, Lounsbury, 718 ; Cape Town, Mally, 11822 ; Bloemfontein, Verwoerd ; Stellenbosch, v. d. Byl, and Verwoerd (Stell. 316) ; Helderberg, v. d. Byl 101.

Brassica napus Linn., Natal, Medley Wood 459, 10453, Kew ; Somerset East, MacOwan 1248, 20914 (S.A.M. 33353) ; Kilgobbin, Fannin, (v. d. Byl 577) 31828.

Brassica nigra Koch, Equeefa, Fuller, 1537, Kew.

Brassica rapa Linn., Pretoria, Bottomley, 20400, Kew ; Stella Bush, Wager, 33194 ; Irene, Pole Evans, 34352.

Brassica spp., Port Elizabeth, Doidge, 1232 ; Isipingo, v. d. Merwe, 15509 ; Glen, Shuttleworth, 32659.

Cardamine africana Linn., Somerset East, MacOwan 1199, 21949 (de Thuem. Myc. Univ. 1314) Kew ; Boschberg, MacOwan 1287, ex Herb. Kalchbr., Kew.

Heliophila meyeri Sond., Van Rhynsdorp, Schlechter, Kew.

Heliophila sp., Cape Town, Lounsbury, 192, Kew ; Tulbagh, Duthie, (v. d. Byl 2597, Stell. 500) ; Gordon's Bay, du Plessis, (Stell. 554).

Lepidium sp., Steynsberg, Pole Evans, 20623.

Raphanus sativus Linn., Pretoria, Wager, 21584 ; Stellenbosch, v. d. Byl 879 ; Constantia, Verwoerd, (Stell. 453).

Sisymbrium gariepinum Burch., Bloemfontein, Potts, 9756, Kew.

Sisymbrium sp., Bloemfontein Verwoerd.

Cystopus cubicus (Strauss) de Bary

Wakefield (1927) 245 ; Doidge & Bottomley (1931) 11, 56 ; Hopkins (1938 a) 99, (1939 a) 20.

Albugo tragopogonis S. P. Gray, Nel (1942) 8.

as Albugo cubicus Nel (1942) 8.

on Cenia turbinata Per., Somerset West, du Plessis (Stell. 831).

Cineraria sp., Stellenbosch, v. d. Byl 2619 and Verwoerd (v. d. Byl 1256).

Dimorphotheca sp., Pretoria, Greenstein, 30665, du Toit, 33747, and

v. d. Merwe, 33897.

Gerbera jamesoni Bolus, Barberton, Pole Evans, 1159, Kew ; Pretoria, Pole Evans, 7803, Kew, Bottomley, 18074, 33452, 32655, Doidge, 20366 and Hean, 32743 ; Johannesburg, Kelly, 10020, Kew ; Empangeni, Krietzen, 25493 ; Salisbury, Hopkins, 27353 ; Salisbury (Rh. 2533, 2543, 2611, 3003, 3029, 3128) ; Durban, v. d. Byl 1150 ; Chase Valley, Wager, 33285.

Gerbera plantaginea Harv., Garstfontein, Pienaar, 1986, Kew and Erasmus 2081, Kew.

Senecio angustifolia Willd., Pretoria, Pole Evans, 11325, Kew.

Senecio inaequidens DC., Maritzburg, Pole Evans, 1428, Kew ; Mooi River, Mogg, 12242.

Senecio orbicularis Sond., Pretoria, Bottomley, 9744, Kew and 18070 ; Irene, Pole Evans, 20365, Kew.

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Senecio pellucidus DC. var. ruderalis Harv., Allerton, Steyn, 30898.

Senecio pinnulatus Thunb., Hopefield, v. d. Byl 1290 (Stell. 145).

Senecio sp., Stellenbosch, v. d. Byl 2619 and Verwoerd (v. d. Byl 1256) ; Hopefield, v. d. Byl (Stell. 884).

Cystopus evansii (Syd.) Sacc. & Trott.

Sacc. Syll. Fung. XXIV (1926) 34.

Albugo evansii Syd., H. & P. Sydow (1912 c) 437 ; Nel (1942) 8.

Cystopus evansii (Syd.) Wakefield (1927) 246 ; Verwoerd (1931 a) 298 ; Doidge & Bottomley (1931) 41.

on Nemesia strumosa Benth. var. suttonii Hort., Bloemfontein, Verwoerd.

Nemesia spp., Hoogfontein, v. d. Merwe, 1472, Kew, Type ; Port Alfred, Graham, 23469 ; Darling, Duckitt, v. d. Byl 2585 and Verwoerd (Stell. 414); Stellenbosch, Sauer (Stell. 830) .

Cystopus ipomoeae-panduratae (Schw.) Stev. & Swing.

Wakefield (1927) 245.

On Convolvulus ulosepalus Hall.f., Buffelspoort, Doidge, 33139.

Ipomoea cardiosepala Hochst., Inanda, Medley Wood 225, Kew ; Medley Wood 467, 847, 10452 ; Barberton, Wager, 26153.

Ipomoea ficifolia Lindl., Tzaneen, Doidge, 20319, Kew.

Ipomoea obscura Ker., Tzaneen, Doidge, 20338, Kew.

Ipomoea sp., Barberton, Pole Evans 1160, Kew.

Cystopus portulacae de Bary

Kalchbrenner (1882 b) 27 ; Sacc. Syll. Fung. VII : 235 ; Wakefield (1927) 244; Hopkins (1938 a) 99, (1939 a) 35.

on Portulaca oleracea Linn., Somerset East, MacOwan 1303, (de Thuem. Myc. Univ. 252 b, Rabenh.-Wint. Fung. Eur. 3775) 20827, Kew ; Skinners Court, 101, Kew ; Pretoria, Burtt Davy, 148, 157, Kew, Pole Evans, 18083, Hean, 29948, Doidge, 29949 ; Lyttelton Junction, Erasmus, 1515, Kew ; Garstfontein, Pienaar, 2145, Kew ; Salisbury, Hopkins.

Cystopus quadratus Kalchbr. & Cooke.

Kalchbrenner & Cooke (1880) 22 ; Wakefield (1927) 246 ; Sacc. Syll. Fung. VII : 237.

on Hypoestes verticillaris R. Br., Cape, MacOwan 1314, Kew, Type ; Garstfontein, Pienaar 1425, Kew.

Cystopus schlechteri Syd.

P. Sydow (1899 d) (142) ; Sacc. Syll. Fung. XVI : 396.

on Salsola aphylia Linn. f., eastern region of South Africa, Schlechter.

Cystopus tragopogonis (Pers.) Schroet.

Verwoerd (1929 b) 25 ; van der Byl (1929 b) 102.

on Helianthus annuus Linn., Durban, Wager, 32417 ; Buffelspoort, Redpath, 34076 ; Hatfield, Pretoria, Anderssen, 34078 ; Naboomspruit, 34050, 34166.

Scorzonera hispanica Linn., Stellenbosch, Verwoerd ; Paarl, Verwoerd.; Stellenbosch, Joubert (v.d. Byl 2063).

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PYTHIACEAE.

Phytophthora cactorum (Leb. & Cohn) Schroet.

Mes (1934) 286 ; Wijers (1937) 211 ; Wager (1941 a) 24, (1942 b) 538, 540. Phytophthora citricola Sawada, Doidge & v. d. Plank (1926) 23.

isolated from :

Antirrhinum majus Linn., Pretoria, Mes, Wager 185, 32599, Verdoorn, 29725; Durban, Wager 536.

Centaurea moschata Linn., Pretoria, Wager.

Citrus maxima Merr., Fish River, Doidge (Wager 292) 32600.

Dianthus caryophyllus Linn., Pretoria, Wijers.

Verbena hybrida Voss., Pretoria, Wijers.

Phytophthora cinnamomi Rands

Wager (1941 a) 16, (1942 b) 538, (1942 a) 521.

as Phytophthora cambivora Petri, Doidge & Bottomley (1931) 10 ; Wager (1931 )32.

isolated from :

Persea americana Mill., Nelspruit, Doidge (Wager 385) 32601 ; Buffelspoort, Wager 501 d; Phoenix, Wager 509, 591.

Phytophthora citrophthora (R. E. & E. H. Sm.) Leon.

Wager (1931) 35, (1941) 23, (1942 b) 538, 540 ; Hector & Loest (1937) 643, Doidge & v. d. Plank (1936) 23 ; Bates (1937) 176 ; Cardoso (1937) 151, (1938) 74, (1939) 44, (1945) 151, 152, 153 ; Hopkins (1938 a) 99, (1939 a) 11; (1943) 182.

Pythiacystis citrophthora R. E. & E. H. Sm., Doidge (1925) 499; Cardoso (1935) 186; Doidge & Bottomley (1931) 43, 45.

isolated from :

Citrus limonia Osbeck, Mazoe, Bates ; Muden, Wager 546; Umbeluzi, Cardoso ; Moamba, Marracuene, Manhiça, Cardoso.

Citrus maxima Merr., Patentie, Wager 190, 32602 ; Mazoe and Rusapi, Hopkins ; Nkwaleni, Wager.

Citrus nobilis Lour. var. deliciosa Sw., Umbeluzi, Moamba, Marracuene, Cardoso ; Mposa, Zululand ; Lourenço Marques, Nascimento.

Citrus sinensis Osbeck, Marico Distr. and Northern Transvaal, Doidge; Mazoe, Bates; Sul do Save, Cardoso; Fort Beaufort, Wager, 32603; Sundays River, Loest ; eastern Transvaal, Loest; Thabazimbi, Jourdan ; Umbelusi, Moamba and Marracuene, Cardoso ; Lourenço Marques, Guimarāis.

Citrus spp., Mayfern, Loest, 33295 ; soil in orange grove, Mazoe, Bates 321.

Phytophthora cryptogea Pethybr. & Laff.

Wager (1941 a) 28.

isolated from :

Godetia sp., Pretoria, Bottomley (Wager 219) 32604.

Chrysanthemum cinerarifolium Viz., Mazoe, Bates 363 (Wager 515); Hopkins (Rh. 6229), ? host as Pyrethrum sp.

Phytophthora infestans (Mont.) de Bary

Doidge & Bottomley (1931) 52, 64 ; Verwoerd (1929 b) 23; Wager (1941 a) 20.

on Solanum tuberosum Linn., Pretoria, Battison, 311; Eikenhof, Brink, 760; Houtboschdorp, Scott, 28721; Haenertsburg, Lake, 28268 ; Mokeetsi, Dixon, 29885 ; Nottingham Road, Clouston, 27383 ; Fort Beaufort, Wager; Stellenbosch, Verwoerd ; Paarl,

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Verwoerd; Plettenberg Bay, Verwoerd ; Camperdown, Gavin, 31988 ; Knysna, Mostert, (Stell. 804) ; Wynberg, (Stell. 1052); East London, Doidge, 10905; Sarnia. Mt. Edgecombe, Phoenix, Wager ; Donnybrook, Hains; Rosetta, Ratsey ; Mooi River, Pickering & Tatham.

Lycopersicum esculentum Mill., Natal coast, Doidge & Bottomley and Storey.

Phytophthora parasitica Dast.

Wager (1935 a) 236, (1941 a) 21 ; Hopkins (1931 d) 49, (1938 a) 99, (1939 a) 5, 10, 21, 24, 27, 40, (1939 b) 40, (1943) 185, 186.

Phytophthora parasitica var. rhei Godfrey, Doidge & Bottomley (1931) 55 ; Wager (1931) 35, 38.

isolated from :

Anthirrhinum majus Linn., Salisbury, (Rh. 1399, 2615).

Clarkia elegans Dougl., Salisbury (Rh. 2759, 3391).

Cotyledon sp., Pretoria, Wager ; Salisbury (Rh. 1669).

Delphinium cultorum Voss, Pretoria, Doidge, 30783.

Godetia sp., Salisbury (Rh. 2698).

Hibiscus sabdariffa Dast., Umtali, Hopkins.

Lilium philippense Baker, Salisbury (Rh. 3667).

Lycopersicum esculentum Mill., Nelspruit, Wager 285, 32606 ; Mazoe, Bates, 32l b ; Durban, Wager 587, 590.

Nicotiana tabacum Linn., Salisbury (Rh. 1538) ; Sabi Valley (Rh. 1473).

Rheum rhaponticum Linn., Uitenhage ; Leeuwdoorns ; Potchefstroom ; Nelspruit , Wager 133, 32605 ; Humansdorp ; Kat River ; Salisbury

(Rh. 1458); Syringa (Rh. 2323).

Trichocaulon sp., Pretoria, Wager.

isolated from soil under indigenous trees, Mazoe, Bates 331.

Phytophthora syringae Kleb.

Wager (1941 a) 30, (1942) 541.

Phytophthora hibernalis Carne, Doidge & v. d. Plank (1936) 23.

isolated from:

Citrus sinensis Osbeck, Fish River, Doidge (comm. V. A. Putterill).

Pythium acanthicum Drechsl.

Wager (1941 a) 13.

isolated from :

Dahlia pinnata Cav., Pretoria, Wager.

Hibiscus sp., Cavendish, Wager 524.

Pisum sativum Linn., Nelspruit, Wager 222, 32607.

Pythium aphanidermatum (Eds.) Fitz.

Doidge & Bottomley (1931) 46, 53 ; Wager (1931 b) 436, (1932 c) 465,

(1933 b) 248, (1941 a) 5 ; Hopkins (1938 a) 99, (1939 a) 27, (1939 b) 103.

isolated from :

Amaranthus tricolor Linn., Umhlanga Rocks, Wager 570.

Carica papaya Linn., eastern and northern Transvaal, Natal and Cape, Wager 130, 32608.

Celosia argentea Linn., Umhlanga Rocks, Wager 569.

Citrus sp., Muden, Wager 538.

Cucurbita pepo Linn., Nelspruit, Wager.

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Lycopersicum esculentum Mill., Nelspruit, Wager ; Windhoek, Wager ; Durban, Wager 572, 578.

Nicotiana tabacum Linn., Rustenburg, Wager ; Balfour, Wager ; Banket, (Rh. 3688).

Pteridium aquilinum (Linn.) Kuhn, White River, Wager.

Sechium edule Sw., Nelspruit, Wager.

Solanum melongena Linn. var. esculentum Nees, Nelspruit, Wager.

Solanum tuberosum Linn., Pretoria, Wager 140, 32609.

Pythium debaryanum Hesse

Hopkins (1932) 463, (1938 a) 99, (1939 a) 17, 24, 28 ; Wager (1941 a) 17. Pythium fabae Cheney, Wager (1941 a) 18.

isolated from :

Antirrhinum majus Linn., Salisbury, Hopkins.

Coleus sp., S. Rhodesia, Hopkins.

Delphinium cultorum Voss, Salisbury (Rh. 1994).

Lactuca sativa Linn., Salisbury (Rh. 2153).

? Musa paradisiaca Linn. var. sapientum Kunze,, Cavendish, Wager 511.

Nicotiana tabacum Linn., Salisbury, (Rh. 1512, 1806) ; M’Soneddi (Rh. 1910).

Persea americana Mill., Buffelspoort, Wager 506.

Stapelia sp., Pretoria, Wager 224, 32610.

Var. pelargonii Braun

Wager (1941 a) 18.

isolated from :

Phaseolus vulgaris Linn., Pretoria, Wager 247, 32611.

Pythium irregulare Buisman

Wager (1931) 5, (1941 a) 7, (1942 b) 538 ; Doidge & van der Plank (1936) 23; St. John-Brooks (1936) 107.

isolated from :

Antirrhinum majus Linn., Durban, Wager 536.

Carica papaya Linn., Louis Trichardt, Wager 155, 32613.

Citrus sinensis Osbeck, Kosterfontein, F. Turner (Wager 90) 32612.

Pythium myriotylum Drechsl.

Wager (1932 b) 435, (1941 a) 10.

isolated from

Carica papaya Linn., Nelspruit, Wager 200, 32614.

Pythium oligandrum Drechsl.

Wager (1941 a) 15.

as Pythium cf. artotrogus, Wager (1931) 39.

isolated from :

Antirrhinum majus Linn., Pretoria, Wager 103, 32615.

Brassica oleracea Linn., Pretoria, Wager 214, 32616.

Cucurbita pepo Linn., Pretoria, Wager.

Papaver rhoeas Linn., Pretoria, Wager.

Pythium spinosum Sawada

Wager (1931) 5, (1932 b) 435, (1941 a) 12.

isolated from :

Antirrhinum majus Linn., Durban, Wager 534.

Carica papaya Linn., Louis Trichardt, Wager 156, 32618.

Phaseolus vulgaris Linn., Cavendish, Wager 529.

102

Pythium splendens Braun

Wager (1931) 16, (1932 b) 435, (1941 a) 11.

isolated from :

Carica papaya Linn., Nelspruit, Wager 151, 32617.

Hibiscus sp., Phoenix, Wager 525.

Lycopersicum esculentum Mill., Cavendish, Wager 528 ; Durban, Wager 583. Zinnia elegans Jacq., Durban, Wager 571.

Pythium ultimum Trow

Doidge & Bottomley (1931) 30, 46, 60 ; Wager (1931) 10, 16, 34, (1932 b) 436, (1941 a) 4 ; Hopkins (1938 a) 99, (1939 a) 10, 16, 27, 34.

as Pythium sp., Hopkins (1932) 465.

isolated from :

Althea rosea Cav., Salisbury, Hopkins.

Aloe variegata Linn., Pretoria, Wager.

Arachis hypogea Linn., Settlers, Wager.

Brassica oleracea Linn., Port Elizabeth, Wager ; Salisbury, Hopkins.

Callistephus chinensis Nees, Pretoria, Wager 170, 32620.

Carica papaya Linn., eastern and northern Transvaal, Natal and Cape, Wager 150, 32619 ; Salisbury and Hartley (Rh. 2273).

Citrus sinensis Osbeck, Fort Beaufort, Wager.

Clarkia elegans Dougl., Salisbury, (Rh. 1353).

Coleus sp., Salisbury (Rh. 1652).

Cupressus sp., Mbesa (Rh. 1435).

Dahlia pinata Cav., Pretoria, Wager.

Delosperma sp., Pretoria, Wager.

Delphinium cultorum Voss, Pretoria, Wager.

Dianthus plumarius Linn., Pretoria, Wager.

Dinteranthus microspermus Schantz, Pretoria, Wager.

Duvalia parviflora N.E.Br., Pretoria, Wager.

Fenestraria aurantiaca N.E.Br., Pretoria, Wager.

Gilia rubra Heller, Pretoria, Wager.

Hakea sp., Durban, Wager 566.

Ipomoea batatas Lam., Pretoria, Wager.

Lathyrus odoratus Linn., Pretoria, Wager.

Lycopersicum esculentum Mill., South-West Africa, Wager ; Durban, Wager 583.

Mesembrianthemum sp., Pretoria, Wager 281, 32621.

Nicotiana tabacum Linn., Rustenburg, Wager ; Salisbury (Rh. 3404).

Papaver nudicaule Linn., Pretoria, Wager ; Stellenbosch, Dippenaar.

Persea americana Mill., Buffelspoort, Wager 503.

Phaseolus vulgaris Linn., Pretoria, Wager.

Pinus coulteri D. Don., Bulawayo (Rh. 2686).

Pinus radiata Don., Salisbury, Hopkins.

Pinus spp., Pretoria, Wager ; Salisbury (Rh. 2172).

Pisum sativum Linn., Nelspruit, Wager.

Rheum rhaponticum Linn., Pretoria, Wager.

Solanum melongena Linn. var. esculentum Nees, Durban, Wager 589.

Stapelia sp., Pretoria, Wager.

Striga lutea Lour., Pretoria, Wager.

Tavaresia sp., Pretoria, Wager.

Tropaeolum majus Linn., Pretoria, Wager.

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Pythium vexans de Bary

Wager (1941 a) 8, (1942 a) 523.

isolated from :

Carica papaya Linn., Louis Trichardt, Wager 201, 32622.

Limonium latifolium Kze., Pretoria, Wager 227, 32623.

Persea americana Mill., Buffelspoort, Wager 501 b.

Pythium sp.

McMartin (1937 b) 267, 253.

on Saccharum officinarum Linn., Natal coast, McMartin.

Pythium sp.

Moore (1926) 428.

on Nicotiana tabacum Linn., seedlings, Moore.

PERONOSPORACEAE

Peronoplasmopara cubensis (Berk. & Curt.) Clint.

Doidge & Bottomley (1931) 22.

Pseudoperonospora cubensis (Berk. & Curt.) Verwoerd & du Plessis (1931) 294; Wager (1935 a) 457.

on Cucumis sativus Linn., Mokeetsi, Fry, 25972 ; Karino, Domirle, 24877 ; Alkmaar, Wager, 26569 ; Kaapmuiden, Hulley, 27580, Phillips, 23234 ; Barberton, Button, 641 ; East London, Slemert, 17087.

Cucumis melo Linn., Constantia, Verwoerd (Stell. 470) ; Villiersdorp, Lotter (Stell. 417); Wynberg, Dippenaar.

Citrullus vulgaris Schrad., South-western Cape, Dippenaar.

Peronospora destructor (Berk.) Casp.

Peronospora schleideni Unger, Pole Evans (1911 b) 258 ; Eyles (1926) 643 ; Hopkins (1930) 528 ; Verwoerd (1929 b) 19, (1931 a) 298 ; Doidge & Bottomley (1931) 42 ; Nel (1942) 9.

on Allium ascalonicum Linn., Kentani, Pegler 2391, 9528.

Allium cepa Linn., Zandvlakte, Gellman, 30841 ; Joubertina, Reinecke, 30839, 33330 ; Riversdale, Verwoerd (Stell. 469) ; Bloemfontein, Verwoerd ; Potchefstroom, Pienaar , 1912 ; Pretoria, F. de Villiers, 5130, Faure, 11791, Rickert, 30842 and van Rooyen, 32205 ; Klip River, v. Zyl, 9193 ; Marabastad, Maré, 30840 ; Bubi, Eyles ; Stellenbosch, Malan (v. d. Byl 1302), Verwoerd, (Stell. 147); Wonderboom, Bottomley, 33329 ; Joubertina, Reinecke, 33330 ; Fort Victoria, Hopkins (Rh. 6122).

Peronospora effusa (Grev.) Rabenh.

Nel (1942) 9.

on Chenopodium ambrosioides Linn., Bon Accord, Mogg, 32430 ; Pyramids, Mogg, 32643.

Chenopodium foetidum Schrad., Potgietersrust, Forster, 28507.

Chenopodium murale Linn., Knysna, du Plessis (Stell. 591).

Chenopodium spp., Cana, Hean, 32144 ; Sandown, Hean, 32426 ; Hopefield, v. d. Byl 1293.

Spinacia oleracea Linn., Johannesburg, Cohen, 34213.

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Peronospora euphorbiae Fuck.

Verwoerd & du Plessis (1933) 227 ; Nel (1942) 9.

on Euphorbia sp., Piquetberg, du Plessis (Stell. 602, v. d. Byl 2689).

Peronospora mesembryanthemi Verw.

Verwoerd (1924 a) 13 ; Doidge & Bottomley (1931) 38 ; Nel (1942) 9.

on Mesembryanthemum spp., Stellenbosch, Verwoerd (Stell. 104, v. d. Byl 1242) Type ; Grahamstown, Dyer, 23383, 23631 ; Bathurst Rail, Elliott, 25481 ; Kloof, McClean, 26332.

Peronospora obovata Bon.

Verwoerd & du Plessis (1933) 228 ; Nel (1942) 9.

on Spergula arvensis Linn., Stellenbosch, Verwoerd & du Plessis, (Stell. 614), v. d. Byl 2688)

Peronospora oxalidis Verw. & du Pless.

Verwoerd & du Plessis (1932) 314 ; Nel (1942) 9.

on Oxalis cernua Thunb., Stellenbosch, du Plessis (Stell. 547, v. d. Byl 2686) Type.

Oxalis sp., Elsenburg, du Plessis.

Peronospora parasitica (Pers.) Tul.

Verwoerd (1929 b) 24 ; Doidge & Bottomley (1931) 15, 54 ; Nel (1942) 9.

on Brassica oleracea Linn., Wellington, Davies, 27264 ; Grahamstown, McClean, 23807 ; Pretoria, Bottomley, 20352 ; Schagen, Theron, 26145 ; Estcourt, 24343 ; Krantzkloof , Bell, 8967 ; without locality, 460 ; Stellenbosch, du Plessis (Stell. 556, v. d. Byl 2685).

Brassica oleracea var. acephala DC., south-western Cape, Dippenaar.

Brassica rapa Linn., Kameeldrift, v. Willigh, 34323.

Raphanus raphanistrum Linn., Somerset West, du Plessis (Stell. 801, v. d. Byl 2701).

Raphanus sativus Linn., Groot Drakenstein, Turner, 7350.

Peronospora rumicis Corda

Verwoerd & du Plessis (1932) 413 ; Nel (1942) 9.

on Polygonum aviculare Linn., Stellenbosch, du Plessis (Stell. 546, v. d. Byl 2702).

Peronospora trifoliorum de Bary

Doidge & Bottomley (1931) 35, 57; Bottomley (1932) 21 ; Nel (1942) 9.

on Glycine max Merr., Cedara, Staples, 17059.

Medicago sativa Linn., Grootfontein, 26083 ; Pretoria, L. Turner, 6935 ; Groenkloof, Mellé, 9190, Doidge, 18071 ; Welverdiend, Burgers, 15535 ; Cedara, Staples, 17059 ; Ixopo, Hancock, 15046 ; Kilgobbin, Fannin (v. d. Byl 579) 31829 ; Stellenbosch, du Plessis (Stell. 585, v. d. Byl 2703).

Peronospora viciae (Berk.) de Bary

Doidge & Bottomley (1931) 47.

on Pisum sativum Linn., Ceres, 728 ; Cape Flats and Stellenbosch, Dippenaar (Stell. 860) ; Grahamstown, Pringle, 34235.

Plasmopara viticola (Berk. & Curt.) Berl. & de Toni.

Pole Evans (1907 a) 166, (1908 c) 213, (1908 e) 124 ; Lounsbury (1907) 330 ; Doidge & Bottomley (1931) 28 ; Hopkins (1930) 524, (1939 a) 48 ; Marloth (1913) 24 ; Cardoso (1939) 45, (1945) 155.

105

on Parthenocissus quinquefolia Planch., Grahamstown, Dewar, 286.

Vitis vinifera Linn., Grahamstown, Dewar, 237 ; Graaff Reinet, Mally, 1534 ; Somerset East, Dewar, 313 ; Fort Beaufort, Pole Evans, 297 ; Cape Town, 223 ; Umzimkulu, MacIntyre, 10132; Barberton, Lounsbury, 1276 ; Lourenço Marques, 24340; Umbeluzi, Xinavane, Guimarāis, Shamva

(Rh. 812).

Sclerospora butleri Weston

Weston (1933) 592.

on Eragrostis aspera Nees, Bulaki, Nyasaland, E. J. Butler (Type in Farlow Herbarium).

? Eragrostis sp., Pinetown.

Sclerospora graminicola (Sacc.) Schroet.

Wickens (1937) 690 ; Hopkins (1938 a) 100, (1939 a) 31 ; Doidge & Bottomley (1931) 35; Weston (1933) 587.

on Pennisetum spicatum Koern, Swallowfields (Rh. 3243).

Pennisetum typhoides Stapf & Hubb., Roodekop, Clover, 26691 ; Immerpan, Todd, 28823 ; Letaba, Curson, 28861 ; Zomba, 8950 ; without locality, Curson, 30464; Makwapala, near Zomba, E. J. Butler.

Setaria verticillata Beauv., Groenkloof, Mackay, 20347.

Sclerospora indica Butler

as Sclerospora maydis (Rac.) Butler, Doidge & Bottomley (1931) 36.

on Zea mays Linn., Naboomspruit, McKay, 20385 ; Pienaars River, McKay, 20425 ; North coast of Natal, 32497.

Sclerospora sorghi (Kulk) Weston & Uppal

Hopkins (1938 a) 100, (1939 a) 44.

sub Sclerospora graminicola (Sacc.) Schroet., Doidge & Bottomley (1931) 31, 32, 59.

on Sorghum caffrorum Beauv., Pretoria, du Preez, 25910.

Sorghum durra Stapf, Pretoria, F. du Toit & Wager, 25903.

Sorghum sudanense Stapf, Ntababane, 15506, 32496 ; Beestekraal, Anderssen 27754 ; Salisbury (Rh. 1950).

Sorghum verticilliflorum Stapf, Pretoria, Lundie, 15419 ; Moorddrift, Kitchener, 11876.