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



ARUNDINEAE 



Phragmites mauritianus Kunth, Rev. Gram. 1: 277. pi. 50. 1830; C. E. Hubbard in 

 Hill, Fl. Trop. Afr. 10: 155. 1937. 

 Phragmites laxiflorus Steud. Syn. PI. Glum. 1: 196. 1854. 



Phragmites communis Trin. subsp. mossambicensis Anderss. in Peters, Reise Mos- 



samb. Bot. 555. 1863. 

 Phragmites communis Trin. var. mauritianus (Kunth) Baker, Fl. Maurit. 454. 1877. 

 Phragmites vulgaris Crep. var. mauritianus (Kunth) Durand & Schinz, Consp. Fl. Afr. 



5: 876. 1895. 



Phragmites vulgaris Crep. var. mossambicensis (Kunth) Durand & Schirrz, Consp. Fl. 



Afr. 5: 876. 1895. 

 Phragmites pungens Hack. Bull. Herb. Boiss. II. 1: 771. 1901. 



Kota-kota District: Nchisi, forming tall brakes in marshy bottoms of gullies, 

 1350 m., August 1, 1946, 17082. Frequent in tropical Africa from Sierra Leone 

 eastwards to Eritrea and south to Angola, Bechuanaland, and Southern Rhodesia; 

 extending to Egypt, Transvaal, Natal, and the Mascarene Islands. 



FESTUCEAE 



Bromus cognatus Steud. Syn. PI. Glum. 1: 321. 1854. 



Zomba District: Zomba Plateau, frequent on moist edges of riparian rain-forest, 

 1680 m., May 31, 1946, 16105. Mountains of tropical east Africa from northeast 

 Africa south to Nyasaland. 



Pseudobromus brassii C. E. Hubbard, Kew Bull. 1949: 341. 1949. 



Species a P. biflora A. Camus, culmis altioribus nodos versus retrorse scaberu- 

 lis, foliorum vaginis apicem versus retrorse scaberulis vel minute hispidulis, la- 

 minis longioribus et latioribus, pedicellis spiculis glumis et lemmatibus breviori- 

 bus, arista subterminali differt. 



Gramen perenne, laxe caespitosum, 150-180 cm. altum;" innovationes extra- 

 vaginales. Culmi erecti, 2-3 _ fasciculati, validiusculi, teretes, usque 4 mm. diame- 

 tro, simplices, circiter 10-nodes, nodos atro-brunneos versus minute et retrorse 

 scaberuli, ceterum glabri, laeves, internodio supremo laevi e vagina longe exserto. 

 Folia atro-viridia; vaginae teretes, striatae, apicem versus retrorse scaberulae 

 vel minute hispidulae, ceterum glabrae et laeves, margines liberae, apice exauri- 

 culatae, basales et intermediae internodiis longiores, superiores internodiis bre- 

 viores; ligulae obtusissimae vel truncatae, firme membranaceae vel chartaceae, 

 usque 5 mm. longae; laminae lineares, basin versus attenuatae vel basi contractae, 

 apice fonge attenuatae, tenuissime acutae, usque 45 cm. longae et 1.6 cm. latae, 

 planae, firmae, tenuiter et arete multinerves, inter nervos transverse nervatae, 

 nervis prope margines et apicem versus minute scaberulae, marginibus scabridae, 

 ceterum glabrae, laeves. Panicula laxissima, nutans, plus minusve ofclonga, 

 35 cm. longa, 15 cm. lata; rhachis laevis; rami erecti vel demum patentes, bini, 

 elongati, inferiores usque 25 cm. longi, gracillimi, glabri, laxissime et distante 

 divisi; ramuli scabridi; pedicelli fere capillares, inaequales, 4-18 mm. longi, 

 scabridi. Spiculae 8-9 mm. longae, 2-florae, oblongae, demum obcuneatae, virides 

 vel purpureo-tinctae; rhachilla dorso dense scabrida, filiformis, internodiis 2 mm. 

 longis. Glumae paullo inaequales, marginibus latis hyalinis exceptis herbaceo- 

 membranaceae, 1-3-nerves, nervibus lateralibus brevibus; inferior lanceolata, acu- 

 minata, tenuiter acuta, 4.5-5 mm. longa; superior late lanceolata vel ovata, acuta, 

 nonnunquam mucronata, 5.5-6.5 ram, longa. Anthoecia 3, duo ^, supremum sterile. 

 Lemmata a latere visa lineari-lanceolata, explanata oblongo-ovata vel elliptico- 

 ovata, acuta, 7-8 mm. longa, marginibus angustis et apice hyalinis exceptis firme 

 herbacea, 3- sub 5-nervia, nervis intermediis valde obscuris, minutissime et dense 

 asperula, aristata; arista 10-14 mm. longa, subterminalis, stricta vel flexuosa, 



