230 
CLXIII. GRAMINE^. 
{Acroceras, 
except leaf sheaths. Leaves thin lanceolate acuminate, base round, 
2 in. long, -25 in. wide, sheaths -25 to *5 in. long, fringed with hairs 
on the edge. Panicle 1-5 to 2 in. long, of one or two branches *5 in. 
long, not spreading, with about 4 spikelets on each. Spikelets light 
green, ellipsoid, •! in. long. Glumes membranous thin. Glume I 
ovate cuspidate; nerves faint, more than half as long as glume III; 
glume II ovate cuspidate; glume III as large, thinner; glume IV 
nerves very faint. Hah. Low swampy ground. Singapore, Eco¬ 
nomic Gardens. Pahang, Pekan and Kwala Berar, Pahang River 
(type of P. Ridleyi, Hack.). Province Wellesley, Telok Ayer Tawar 
(Ridley). Distrih. India, Java. 
41 . HYMENACHNE, Beauv. 
Tall marsh grass. Leaves long, amplexicaul at base. Panicle 
spicifonn, the branches appressed to the rachis. Spikelets not 
gibbous, lanceolate-acuminate acute. Glumes thin, glume I ovate 
blunt, about a quarter the length of glume III; glume II lanceolate, 
long acuminate; glume III as long, narrower; glume IV broad 
lanceolate, short acute. Species 4, all the tropics. 
(i) H. myuros Beauv. Agrost. 49, t. 10, fig. 8. Panicum m^iirus 
H.B.K. Nov. Gen. and Sp. i. 98; Hook. fil. F.B.I. vii. 39; Ridl, 
Mat. iii. 135. 
A tall grass with a long spongy rooting rhizome often very 
thick; stems 2 to 6 ft. tall and sometimes -25 in. through. Leaves 
