STIPEAE PLATENSES 



135 



Corona parum pcrspicua pusilla (0,5 mm long. = 0,25-0,35 mm 

 cliam.) callosa aibida saepius superne a laterc, basi ventre ct dorso 

 compressula glabra, acie nuda v. vix pilosula, dorso non v. obso- 

 lctissime emarginata, ventre minute mucronulata v. auriculata. 



Species St. arcaensi Speg. nec non St. nuhicolac Speg. afflnis, 

 ab utraque tamen satis riteque distincta. 



VII. PARASTIPA Speg. 



Char. Glumac flosculo breviorcs; flosculus acquiiateraUs subfu- 

 soideus, glaber, laevis, glumella infera marginibus liyantibus, glu- 

 mellam superam aequilongam subrigidulam aequilongam non sul- 

 catam ostendens, cum arista persistente non geniculata subcirrhosa 

 subcrassiuscula nuda, corona plane nulla, continua; anthopodium 

 breve acutiusculum villosulum. 



Subgenus inter genera Stipa et Muehlenbergict medium . 



39. Stipa rariflora (Hook. f.) Benth. 



Muehlenbergia rariflora Hook. 

 fll., Flor. ant. v. II, p. 371, tab. 

 CXXXI. 



Stipa rariflora Benth., Journ. 

 Linn. soc. XIX, p. 31. 



Diag. Glumae lanceolatae flo- 

 sculo dimidio breviores, 1-nerves, 

 violascentes ; flosculus fusoideus 

 glaber laevis violascens; anthopo- 

 dium flosculo triplo brevius albo- 

 villosum; corona plane nulla; ari- 

 sta persistens, subcrassiuscula canaliculata, flosculo 10-pIo longior 

 fusco-violacea. Culmi graciles folia brevia laxe convoluta laevia 

 pluries superantes; panicula nuda paucispiculigera laxissima erecta 

 v. nutans. 



39. Stipa rariflora (Hools. f.) Benth. 



a. Spicula ^\ 



b. Floseulus '/i 



c. Flosculus Vi 



