1 76 GrafllinecB. {Arundinella. 



and palea or tightly embraced by these, embryo large. — 



Sp. about 30 ; 23 in Fl. B. Ind. 



I retain Arundinella in the group of Panicacecz, because of the 

 spikelets always articulate with their pedicels, or with glumes I and II 

 often separately disarticulating, and the uppermost of the fig. glumes 

 being always female or bisexual. The disarticulation of glume IV is, 

 however, a Poaceous character, as is the elongation of the rhachilla 

 between the three lower glumes in some species. 



Glume IV 3-awned. 



Annual, 1. 1-3 in 



Perennial, 1. 6-10 in 



Glume IV i-awned (sometimes awnless in A. 

 laxiflora). 

 Spikelets in short densely crowded villous 

 spikes ...... 



Spikelets panicled, glabrous. 



Spikelets very shortly pedicelled 

 Spikelets long-pedicelled. 

 Panicle 4-8 in., erect 

 Panicle 12-20 in., drooping . 

 Glume IV awnless. 



L. base broad, cordate, amplexicaul 

 L. base narrow, rounded 



I. 



A. 



AVENACEA. 



2. 



A. 



SETOSA. 



s 

 3- 



A. 



VILLOSA. 



• 4- 



A. 



LEPTOCHLOA. 



• 5- 



A. 



LAXIFLORA. 



. 6. 



A. 



Lawii. 



• 7- 



A. 



BLEPHARIPHYLLA 



. 8. 



A. 



Thwaitesii. 



i. A. avenacea, Munro ex Thw. Enum. 362 (if 



Aira, 3, Griff. Notul. iii. 55. C. P. 3471. 



Fl. B. Ind. vii. 69. Griff. Ic. PI. Asiat. t. 146, f. iii. (Airoid.). 



Annual, weak, slender, straggling, rooting below at the 

 nodes, with ascending leafy stems 12-18 in. high, lower inter- 

 nodes short, upper very long, nodes glabrous ; 1. i-i|- in., ovate- 

 lanceolate from an amplexicaul pectinately ciliate 2-auricled 

 base, acute, fiat, glabrous or sparsely hairy, deeply closely 

 striate above, faintly 5-veined beneath, basal auricles rounded, 

 decurrent on the sheath, embracing the narrow linear ligule 

 which is ciliate at the tip, margins scaberulous, lower sheaths 

 short, loose, upper long; panicle h-i in., ovoid, compact, 

 rhachis and branches very short, scaberulous glabrous or 

 hairy ; spikelets \-\ in., lanceolate, crowded, base articulate 

 but persistent; glumes rather coriaceous, I and II distant at 

 the base, oblong-lanceolate, strongly 3-5 -veined, I narrowed 

 into an erect scaberulous awn as long as itself, margins setose 

 above the middle, keel scaberulous, II rather longer, margin 

 setulose above the middle, tip obtuse, ciliate, notched with a 

 short awn in the sinus, III thinner, and rather shorter than II, 

 3-veined, tip obtuse, dorsally mucronate, paleate, bisexual, 

 IV female, much shorter than III, oblong, terete, thinly 

 coriaceous, hirsute with brown hairs, faintly 3-veined, deeply 

 2-lobed, 3 awned, side awns straight capillary terminating 

 the triangular lobes, median awn short with a broad dark 



