952 CXLA'II. OKAMIXE.'E. 



coriaceous, dorsally flattened or siibcouvex, ovate or oblong, usually 

 obtuse ; upper invol.-plume chartaceous to meuibranous, muticous ; 

 lower floral glume hyaline, paleate or not ; upper floral glume paleate, 

 2-sexual. Lodicules 2, quadrate or cuneate. Stamens 3. Stigmas 

 generally laterally exserted. Grain broadly oblong. — Distrib. Species 

 about '3(), temperate and tropical. 



Rhachis of raceme not fragile ; lower invol.-glume not winged ; 



a perennial grass 1. B. comjn-cxsa. 



Bliiicbis of raceme fragile; lower invol.-glume winged (scarcely 

 winged in li. exaltata). 



Annual; stems less than 30 in. long ; lower invul.-glunie 

 broadly winged. 



Lower invol.-glume 2-aristate 2. E. divcryeiis. 



Lower invol.-glume with a simple awn or acuminate. 

 Pedicel of upper spikelet adnate to the joint of 

 the rliachis. 



Lower invol.-glume broadly ovate, acuminate 



(not awned) 3. B. atunnnata. 



Lower invol.-glume lanceolate with a slender 



scabrid awn 4. B. Talboti. 



Pedicel of upper spikelet wholly free from the 

 joint of the rhachis ; lower invol.-glume 



awuless 5. B. Clarlcei. 



Perennial; stems 6-10 ft. long; lower invol.-glume 



scarcely winged 6. B. exaltata. 



1. Rottboellia compressa, Linn. f. Suppl. (1781) p. 114. 

 Perennial ; stems erect from a decumbent rooting base, 2-5 ft. long 

 (according to Roxburgh scaudent and reaching 20 ft. long), branched, 

 compressed, glabrous, striate, leafy. Leaves 1-5 by -1— i in,, linear, 

 acuminate, flat, glabrous, base rounded, margins scabrid ; sheaths shorter 

 than the internodes, compressed, loose, glabrous ; ligule short, mem- 

 branous, ciliate. E-acemes few or many, often fascicled, 2-5 in. long, 

 erect, straight or curved, herbaceous, dark green ; rhachis almost in- 

 articulate ; internodes broad, striate, glabrous, nearly as long as the 

 glabrous spikelets. Sessile spihelets ^-1- in. long; callus small, naked. 

 Glumes 4; lower invol.-glume coriaceous, bluntly acuminate, the tip 

 often shortly membranous, T-U-nerved ; upper invol.-glume as long as 

 the lower, linear-oblong, acutely acuminate, membranous, 3-nerved, 

 adhering to the cavity of the internode ; floral glumes subequal, \ in. 

 long, lanceolate, acute, nerveless, hyaline ; palea linear, -^ in. long. 

 Fedicellate sjnkehis rather longer and narrower than the sessile ; lower 

 invol.-glume acutely acuminate ; upper invol.-glume chartaceous, 5-7- 

 nerved ; floral glumes as in the sessde spikelets. Fl. B. I. v, 7, p. 153; 

 (^rah. Cat. p. 233; lloxb. Fl. Ind. v. 1, p. 354; Trim. Fl. Ceyl. v. 5, 

 p. 206: Woodr. in .lourn. Bomb, Nat. v. 13 (1901) p. 437; Prain, 

 Beng. 1^1. p. 1192.— Flowers : Nov. Yeiin. Baika. 



Gujarat: Godra, Conkel Si.vn : Woo'h-ow \ Shikarpur, Wooclroxu. — DiSTRin. 

 Throughout the hotter parts of India, generally in wet places; Ceylon, most warm 

 climates. 



2. Rottboellia divergens, Ilaclc Monog. Andropog. in DC. 

 Monog. r/ian. v. <) (1889) p. 292. Annual ; stems 4-9 in. high, erect 

 or ascending, slender ; nodes 2-3, all with usually 2-nate flowering 

 branches. Leaves 2-4 by y\-|-g in., linear, acuminate, complicate, rising 



