964' CXLTII. GRAMINE.i:, 



11. Ischaeintim laxum, Br. Prodr. (1810) p. 205. Perennial; 



stems 2-3 ft. bigli, tufted ou a short rootstock, simple, slender, erect, 



glabrous, leafy : nodes glabrous. Leaves 6-12 by -^^ in,, erect, linear, 



narrowed to "long capillary tips, flat, smooth, striate, glaucous, with 



minutely scaberulous margins, base not contracted; sheaths shorter 



than the internodes, glabrous or sparsely hairy, not auricled at the 



mouth ; ligule a tuft of silky hairs. Eaceme solitary, 2-4 in. long, 



suberect, pale, fragile ; internodes and pedicels of upper spikelets about 



J- as long as the spikelets, concavo-convex, the sides ciliate with long 



silky hairs. Sessile spilcelets f in. long, linear-oblong, acuminate, pale 



green; callus short, obtuse, shortly bearded. Glumes 4; lower invol.- 



glume oblong-lanceolate, acuminate, with a broad depression in the 



middle instead of a midnerve, tlie tip 2-dentate, the teeth ending in 



short capillary awns, margins inflexed, nerves 6, very conspicuous on the 



back, the 2 lateral nerves very strong, running into the apical teeth, the 



4 intermediate nerves diverging from the base in pairs, afterwai'ds more 



or less converging ; upper invol.-glume rather shorter than the lower, 



membranous, ovate-oblong, acuminate, concave, terminating in a slender 



awn reaching | in. long, the margins ciliate near the apex, nerves 3, very 



slender ; lower floral glume lanceolate, acuminate, hyaline, nerveless, 



triandrous, paleate, the palea linear-oblong, obtuse ; upper floral glume 



\ in. long, hnear, hyaline, deeply cleft into 2 lanceolate-subulate lobes, 



female; palea linear-oblong, equalling the glume; awn up to 1| in. 



long, the lower 1 in. brown, the upper | in. white. PediceUate spikelets 



as long as the sessile; lower invol.-glume f in. long, ovate-oblong, 



bicuspidate, 7-nerved, the nerves very conspicuous on the back; upper 



invol.-glume 1-nerved, shortly awned ; lower floral glume as in the 



sessile spikelet ; upper floral glume triandrous, not awned. Fl. B. I. 



V. 7, p. 136 ; Trim. Fl. Ceyl. v. 5, p. 219 ; Woodr. in Journ. Bomb. Nat. 



V. 13 (1901) p. 437 ; Prain, Beng. PI. p. 1196; Watt, Diet. Econ. Prod. 



V. 4, p. 531. — Flowers: Sept. Vehn. Sheda; Paunat. 



Comirion throughout the Presidency. Deccan : Khaudesh (used for thatcliing), 

 Lisbon; Poona, Woodrow; Poona to Karli, ./ac5we«i07i<, 530 ! — Distuib. India (Beugal, 

 Behar, Central Provinces, W. Peninsula) ; Ceylon, Australia, Cape de Terd Islands. 



12, Ischsemum sulcatnm, Haclc Monog. Ajidropog. in DC. Monog. 

 Phan. v. 6 (1889) p. 248. Stems geniculate, ascending, reaching 20 in. 

 long or more, weak, terete, glabrous, not ribbed, much branched from 

 the base ; nodes glabrous. Leaves 4-8 by i— ^ in., linear or lanceolate, 

 setaceously acuminate, many-nerved, glaucous, glabrous; sheaths lax, 

 glabrous, constricted at the mouth ; ligule a narrow ciliate membrane. 

 Eaceme solitary, 2-3 in. long ; joints and pedicels shorter than the 

 sessile spikelet, slender, ciliate. Sessile spikelets f in. long ; callus about 

 -Jg- in. long, shortly hairy at the base, cuneate ; lower invol.-glume f in. 

 long, subchartaceous, bicuspidate, lanceolate, scabro-punctate, the 

 margins incurved in the upper, open in the lower part, with a furrow 

 in the middle in the place of the midnerve and 2 nerves one at each side 

 of and close to the furrow; upper invol.-glume rather shorter than the 

 lower, chartaceous, 3-5-nerved, shortly 2-dentate, ciliate in the upper 

 part and w^ith a capillary awn | in. long from the sinus ; lovver floral 

 glume \ in. long, linear, subacute, witli incurved margins, hyaline, 

 paleate, the paloa as long, oblong, slightly emarginate ; upper floral 



