Dimeria.] CXLIV. GRAMINES. 523 
Glumes 4, 2 outer empty ones regress m keeled, not awned, the 3rd 
also empty but smaller, thin and | ; terminal glume thin and 
transparent, entire or 2-lobed, with a yaris awn either terminal or in 
t j 
n 
siiddesd i in the outer glume 
A small qe? extending over tropical A tud the two Australian species one is 
also in East India, the other appears to be e 
p qoi 2 lines long, with a tuft of soapy at the 
bas uter glumes rather thick. iy Pet s 3?) . 1, D. acinaciformis, 
Spikelets aout 1 line long. without any or cate very 
e tuft of ee Outer glumes thin. Stamens 2. 2. D. tenera. 
1. D. acinaciformis, R. Br. Prod. 204.—A vy i a branch- 
ing at the base, with filiform stems 6 in. to 1 ft. . Leaves few near 
the ba ase, narrow, cr with a few long ers Spikes 2, flat, the 
filiform flexuose rhachis 1 to 13 in. Fo i i 
nearly 2 lines long, rc a prominent tuft of white hairs or cilia at their 
ase. Outer glume rather thick, complicate, not bordered, the keel 
minutely serrate-ciliolate ; 2nd glume rather longer, nearly as thick but 
de = by a thin hyaline pasa the keel more prominent at the end. 
Terminal flowering glume very narrow alte yaline, shortly 2-lobed, 
distinctly keeled, the sel. produced into a iren re twisted and bent 
awn of about i in. Stamens 3 (R. Brown), all fallen away from the 
spikelets examined. 
Queensland. Endeavour River, Banks and Solander. 
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2. D. tenera, Zrin. in Mem. Acad. Petersb. = 6, ii. 225.—A slender 
br. ia with filiform stems 6 in. to 1 t. high, erect or weak 
and decumbent. Hte ves narrow, ciliate, the aheaths sprinkled with 
long spreading hairs, the ligula eee cei Spikes 2, filitorm, 1 to 
13 in, long. S ies iari 1 line long, very narrow, withosí any or 
rarely an exceedingly m te tuft of hairs at y base. Glumes thinner 
than in D. acinaci inen i e outer one usually sprinkled with a few 
hairs and the 2nd shortly ciliate on the hyaline menm. the 3rd very 
i i i ing glume rather 
rminal.— 7. pacis F. Muell. Fragm. v 
N. Australia. Port Darwin, Schultz, n. 321. 
Widely spread over East India, from the Peninsula to Nepaul and Mergui. 
27. ARTHRAXON, Beauv. 
(Batratherum, Nees.) 
Spikelets 1-flowered, sessile in the alternate notches of the artic 
rhachis of simple spikes, with a short pedicel in the same notch 
alate 
usually 
