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80 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [Vol. 9, No. 1 



Kota-kota District: Kota-kota, in fresh water, 460 m., Aug. 1946, Vernay 17398. 

 Chia area, associated with Nymphaea spp. in waterholes, leaves brownish, sub- 

 merged, fruiting peduncles loosely spirally twisted, flowers yellow, crinkled, 

 480 m., Sept. 3, 1946, 17505. Widespread in tropical Africa and Madagascar. 



I am very grateful to Mr. J. E. Dandy of the British Museum (Natural History) 

 for kindly checking my determinations in this family. 



BURM ANNIACE AE 



Burmannia welwitschii Schlecht. Repert. Sp. Nov. 21: 84. 1925; Jonker, Monogr. 

 Burm. 100. 1938. 



Burmannia bicolor Mart. var. africana Ridl. Jour. Bot. 25: 85. 1887. 



Kota-kota District: Chia area, moist grassy edge of a marsh, herb 10-20 cm. 

 high, stem green, outer lobes of flower white, inner purple, wings of ovary lilac, 

 480 m., Sept. 1, 1946, 17473. Tanganyika Territory, southwards to S. Rhodesia and 

 Angola, westwards to French Guinea and the Gaboon (fide Jonker, I.e.). 



I am grateful to Mr. P. Taylor for his help in naming this plant. 



ORCHIDACEAE" 



Holothrix johnstoni Rolfe, Kew Bull. 1896: 47. 1896. 



Mlanje District: Mlanje Mountain; Luchenya Plateau, associated with Sphag- 

 num under wet shady rocks on grasslands, flowers pink, later white, 2140 m., June 

 27, 1946, 16459; under shelter of rocks on grassland, flowers pink, 2100 m. , July 

 16, 1946, Anthony 16855. Nyasaland. 



Habenaria macrostele Summerh. Bot. Not. 1937: 184. 1937. 



Zomba District: Zomba Plateau, on a moist shaded grassy slope, flower tepals 

 green, column white, 1450 m., June 5, 1946, 16231. Nyasaland and S. Rhodesia 

 (Inyanga). 



Disa zombica N. E. Brown in Dyer, Fl. Trop. Afr. 7: 278. 1898. 



Zomba District: Zomba Plateau, scattered over grasslands, common, flowers 

 over, 1750-1800 m., 1946, 16114. Nyasaland and southern Tanganyika Territory. 



Satyrium chlorocorys Reichenb. f. ex H. H. Johnston, Kilimanjaro Exp. App. 346. 

 1886 (nomen); ex Rolfe in Dyer, Fl. Trop. Afr. 7: 268. 1898. 

 Zomba District: Zomba Plateau, locally common on moist shady slopes, flowers 

 green, 1450 m., June 5, 1946, 16230. Tanganyika, Nyasaland, S. Rhodesia 

 (Inyanga). 



Satyrium densum Rolfe in Dyer, Fl. Trop. Afr. 7: 270. 1898. 



Zomba District: Zomba Plateau, in Brachystegia woodlands, flowers pink, 1500 

 m., June 4, 1946, Anthony 16199; in grass on a moist sunny slope, flowers pale 

 pink, 1500 m., June 5, 1946, 16243. Nyasaland. 



Satyrium speciosum Rolfe in Dyer, Fl. Trop. Afr. 7: 574. 1898. 



Zomba District: Zomba Plateau, in grass on moist shady slope, flowers white, 

 1450 m., June 5, 1946, 16241. Kenya Colony, Nyasaland, S. Rhodesia, Portuguese 

 East Africa. 



Polystachya Hook. sect. Eurychilae Summerh., sect. nov. 



Plantae epiphyticae vel saxicolae. Rhizoma breve, repens. Caules contigui, 

 erecti, basi in pseudobulbos parvos incrassati, superne graciles, sub anthesi 

 aphylli sed per totam longitudinem foliorum vaginis obtecti. Foliorum laminae non 



By V. S. Summerhayes, Royal Botanic Gardens, Kew. 



