426 On some neiv or ohscurc species of Plants. 



while studying the genus Sacchariim, 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 dorse glabrae ; villi involucrales longi.) 



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



Gluma basi brumieo callosa, . . . Sect. 2. 



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



Glumae chartacese pilosae, villi involucrales longi, Sect. 3. 



Glumse brunneo-callosse ; villi involucrales breves, Sect. 4. 



Sect. 1 — Eusaccharum. 

 Flosculi superioris valvulae subaequales, minutae, ovarium sub- 



aequantes, ..... S.officinarum,h. 



Flosculi superioris valvula superior lanceolata neutro dimidio 



brevior, inferior nulla, . . . S. Sinense, Roxb. 



Sect. 2 — Tylosaccharum. 

 Flosculi super, valvule nuUae, spiculae ovatae, folia subulata 



canaliculata, .... S.canaliculatmi,R. 



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

 vissima subquadrata, spicula; lanceolatae, 

 Folia angusta nervo albo latiusculo canaliculato, pani- 



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



Folia subulata omnino canaliculata, panicula linearis ^ ^- sponfanemn, L. 



ramis sub simplicibus, . i {S.canaliculatum, N. 



' ■ ( ab E. in Wight. Cat. 



Sect. 3 — Trichosaccharum. 

 (Glumae subulato-acutatte -. valvula inferior flosc. hermaph. setuligera.) 

 Folia canaliculata anguste linearia, nervo albo lato cana- 

 liculato, . . . . . S. Muvja, Roxb. 

 Folia plana • 



f S. procerum, Roxb. 

 Paniculae rami graciles laxi decompositi, . < (S. Sara, Hook, et 



( Arn. 

 Paniculae densae contracts, rami stricti rigiduli : 



r S. arundinaceum. 

 Spicule distantes ; rami panicula elongati poly- \ Retz. S. exaltatum, 

 stachyi, . , . . " ■) N. ab E. in Wight 



Spiculae approximatae, (rhachidis internodia pedi- 

 cello spic. pedicellatae vix longiora,) 

 Paniculae rami subelongati decompositi polystachyi, A'. Sara, Roxb. 

 Paniculifi rami breves oligostacbyi, . S. exaltatum, Roxb. 



.3 



