MONOCOTYLEDONES. ."227 



Superantibus, rccurvis, laevibiis, indivisis, alteriiis, distanti- 

 bus. LocustcB subcylindraceae, cernuae v. peiiduloe, semun- 

 ciales, pnrpureae, nitidx*, per lentcm tennissiine pubescentes. 

 Glif.ma bivalvis, nana, insequalis, niembraiiacea, purpurea, 

 mutica; valvula inferiore ovwi^, acuta; ivz/ymor^ obovata, [cpxc 

 obtusissima, inferiore duplo latiore, paulo longiore. Peri- 

 anfhia altcrna, distincta. Valcida inferior obovato-oblonga, 

 obtusissima, concava, quinquencrvis, extus pube brevissiuia 

 appressa conspersa, apice marginibusque ab apice ad medium 

 albis, scariosis, nervis omnibus infra apicem desinentibus, 

 medio in mucronuhun brevissimum, marginem valvulse vix 

 attingentem prochicto. Valvida superior longitudine fere 

 inferioris, manifeste angustior, elliptico-lanceolata, apice 

 profunde emarginato, lateribns indnplicatis, dinervis, nervis 

 brevissime ciliatis, singulis bisetis, sefis lateralibus, per paria 

 oppositis, du(B inferiores infra medium valvulse orta3, subu- 

 lato-filiformes, strictae, modice ])atentes, denticulatae, longi- 

 tudine circiter dimidii totius valvulae ; dim superiores paulo 

 supra medium valvnlae ortum ducentes, brevissimae, dcnti- 

 culatse, mucroniformes, altera quandoque obsoleta. Lodi- 

 culm 2, collaterales, approximatse, bi'evissimae, truncata^, 

 basi leviter cohaerentes, sed absque laesione scparandce. 

 Stamina 3, filamentis ca[)illaribus, antheris linearibus 

 utrinque semibifidis. Ovarium ovatum, imberbe. Sti/Ii 

 2, glabri. Stirpnafa laxe plumosa, liyalina, ramis denticulatis, 

 superioribus vix brevioribus. Cart/opsis libera, lateraliter com- 

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

 tudinaliter saturatiore. Evdxryo caryopside triplo brevior. 



Ohs. Duplex varietas. 



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

 1—7. 



/3, 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 speciuiens were found of both varieties 

 of this remarkable grass. 



