Deyeuxia. | GRAMINEA, 873 
linear. bidentate. Rhachilla produced into a hairy bristle at the 
back of the palea, about 4$ its length.—D. scabra, Buch. N.Z. 
Grasses, t. 26a (not of Benth.). 
Sour IstaAnp: Otago—Swampy Hill (near Dunedin), Mount Pisa, Petrie! 
1500-3500 ft. 
This was referred by Mr. Buchanan to D. scabra, Benth. (Agrostis scabra, 
R. Br.; Hook. f. Fl. Tasm. ii. 116, t. 160), which differs from the New Zealand 
plant, as indicated by Professor Hackel, in the small spikelets; scabrid branches 
of the panicle; in the flowering glume being almost as long as the empty ones, 
much more coriaceous and obtuse, and with fewer shorter hairs on the callus; 
in the very short awn inserted far above the middle of the back of the glume; 
and in the process of the rhachilla being shorter and less hairy. 
19. DICHELACHNE, Endl. 
Tall slender grasses. Leaves narrow, flat or convolute. Spike- 
lets 1-flowered, numerous, arranged in long and narrow usually 
dense panicles; rhachilla disarticulating above the 2 outer glumes, 
very slightly or not at all produced beyond the flower. Glumes 3; 
2 outer subequal or slightly unequal, empty, persistent, narrow, 
sharply acuminate, keeled, membranous; 3rd or flowering glume 
almost as long, keeled, entire or shortly 2-fid, furnished with a long 
flexuous awn inserted on the back just below the tip, base of the 
glume with a hairy callus. Palea slightly shorter than the glume, 
narrow, 2-nerved. Stamens 2-3. Styles short, distinct; stigmas 
plumose. Grain narrow, enclosed in the slightly hardened flower- 
ing glume and palea. 
The genus is confined to the two following species, both of which extend to 
Australia and Tasmania. 
Panicle dense. Spikelets 4in. Awn 1lin., not twisted at 
the base .. #, ae “ ne -. L. D. crinita. 
Panicle lax. Spikelets }in. Awn 4-#in., usually twisted 
at the base are ie 3: Sr 2. D. sciwrea. 
1. D. crinita, Hook. f. Fl. Nov. Zel. i. 293.—Annual. Culms 
tufted, tall, slender, erect, 2-3 ft. high, leafy at the base. Leaves 
much shorter than the culms, flat or convolute, glabrous or the 
lower ones sometimes softly pubescent; margins smooth or slightly 
scaberulous; sheaths grooved, the upper rather long; ligules short, 
broad. Panicle very dense and spike-like, 3-6in. long or more, 
bristling with the numerous awns which almost conceal the spike- 
lets, pale-green, shining; branches numerous, short, erect. Spike- 
lets +4 in. long. Two outer glumes more or less unequal, very 
narrow, long-acuminate, membranous or hyaline, keel green and 
scabrous; 3rd or flowering glume distinctly shorter, convolute, 
smooth or slightly rough, produced into a hyaline entire or 2-fid 
tip; awn very long, about lin., straight or flexuous, not twisted 
at the base. Palea about + shorter than the flowering glume, 
linear, 2-nerved.—Handb. N.Z. Fil. 326; Fl. Tasm. ii. 111; Benth. 
