426 On some new or obscure species of Plants. 



while studying the genus Sacckarum, and the group to which it 

 belongs, than almost any others of the family. The following Cla- 

 vis Analytica of the species, which I drew up to lessen my own la- 

 bours in future, may perhaps prove useful likewise to others. Most 

 characters are excluded which are not essentially necessary for dis- 

 tinguishing the species mentioned from each other. 



Valvula flosc. hermaph. inferior vel deficiens vel neutri valde dissimilis ; ( Glu- 

 mae dorso glabra ; villi involucrales longi.) 



Gluma saltern inferior pallide chartacea, . . Sect. 1. 



Gluma basi brunneo -callosa, . ; . Sect. 2. 



Valvula flosc. hermaph. inferior neutri fere similis et sequimagna. 



Glumae chartacese pilosse, villi involucrales lougi, Sect. 3. 



Gluma? brunneo-callosae ; villi involucrales breves, Sect. 4. 



Sect. 1 — Eusaccharum. 

 Flosculi superioris valvules subaequales, minutae, ovarium sub- 



aequantes, . . . . . S. officinarum, L. 



Flosculi superioris valvula superior lanceolata neutro dimidio 



brevior, inferior nulla, S. Sinense, Roxb. 



Sect. 2 Tylosaccharum. 



Flosculi super, valvulae nulla?, spiculae ovatae, folia subulata 



canaliculars, .... *S. canaliculatum, R. 



Flosculi super, valvula infer, lineari-lanceolata, superior bre- 

 vissima subquadrata, spiculae lanceolatae, 

 Folia angusta nervo albo latiusculo canaliculato, pani- 



cula oblonga ramis compositis, . S. semidecumbens, R. 



Folia subulata omnino canaliculars, panicula linearis \ "• spontaneum, L. 



ramis sub simphcibus, . £ ^ E ^ w{g ^ ^ 



Sect. 3 — Trichosaccharwn. 

 ( Glumae subulato-acutatae : valvida inferior flosc. hermaph. setuligera. ) 

 Folia caiialiculata anguste linearia, nervo albo lato cana- 

 liculato, . . . S. Munja, Roxb. 

 Folia plana • 



S. procerum, Roxb. 

 Panicula; rami graciles laxi decompositi, \ (S. Sara, Hook, et 



( S. procerus 

 < (S. Sara, 

 C Am. 



Paniculee densae contractae, rami stricti rigiduli : 



' S. arundinaceum, 



r*. a 

 Spiculae distantes ; rami panicidae elongati poly- \ Retz. S. exaltatum, 



I N.a - 

 I Cat. 



stachyi, . , . . \ N. ab E. in Wight 



Spicules approximatae, (rhachidis internodia pedi- 

 cello spic. pedicellatae vix longiora,) 

 Panicul* rami subelongati decompositi polystachyi, S. Sara, Roxb. 

 Pamculee rami breves oligostachyi, . S. exaltatum, Roxb. 



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