MONOCOTYLEDONES. 227 



superantibus, recurvis, Isevibus, indivisis, alternis, distanti- 

 biis. Locustce. subcylindracese, cernuse v. pendulse, semun- 

 ciales, pnrpurese, nitidse, per lentem tenuissime pubescentes. 

 Gluma bivalvis, nana, inaequalis, niembranacea, purpurea, 

 mutica; valvula inferiore ovd.i?i, acuta; superiore ohoM&idi, fccxo 

 obtusissima, inferiore duplo latiore, paulo longiore. Peri- 

 antJiia alterna, distiiicta. Valvula inferior obovato-oblonga, 

 obtusissima, concava, quinquenervis, extus pube brevissinia 

 appressa conspersa, apice marginibusque ab apice ad medium 

 albis, scariosis, nervis omnibus infra apicem desinentibus, 

 medio in mucronulum brevissimum, marginem valvulae vix 

 attingenteiii producto. • Valvula superior longitudine fere 

 inferioris, manifesto angustior, elliptico-lanceolata, apice 

 profunde emarginato, lateribiis induplicatis, dinervis, nervis 

 brevissime ciliatis, singulis biselis, setis lateralibus, per paria 

 oppositis, ducB inferiores infra medium valvulse ortse, subu- 

 lato-filiformes, strictse, inodice patentes, denticulatse, longi- 

 tudine circiter dimidii totius valvulse; du(2 superiores paulo 

 supra medium valvulse ortum ducentes, brevissimae, denti- 

 culatse, mucroniformes, altera quandoque obsoleta. Lodi- 

 cul(B 2, collaterales, approximatse, brevissimse, truncatse, 

 basi leviter cohserentes, sed absque Isesione separandse. 

 Stamina 3, filamentis capillaribus, antheris linearibus 

 ntrinque semibifidis. Ovarium ovatum, imberbe. Styli 

 2, glabri. Stigmata laxe plumosa, h^^alina, ramis denticulatis, 

 superioribus vix brevioribus. Caryopsis libera, lateraliter com- 

 pressa, ventre angusto-lineari, leviter canaliculate, axi longi- 

 tudinaliter saturatiore. Embryo caryopside triple brevior. 



Obs. Duplex varietas. 



a, elatior, subspitbamea, antheris stramineis. Tab. D, f. 



1—7. 



j3, 3-4-uncialis, antheris purpureis. Tab. D, f . 8 — 10. 



The specific name is given in honour of Captain Edward 

 Sabine, in whose herbarium, the most extensive formed in 

 the voyage, numerous specimens were found of both varieties 

 of this remarl^able grass. 



