Deyeuxia. | GRAMINEAE. 163 
quadriseta R. Br. Prodr. (1810) 171; Hook. f. Fl. Nov. Zel. i (1853) 296 ; 
Handb. N.Z. Fl. (1864) 330; Buch. N.Z. Grasses (1879) t. 26. Avena 
quadriseta*Labill. Pl. Nov. Holl. 1 (1806) 25, t. 32. 
NortH anp Sout Is~anps, Stewart Istanp: Not uncommon throughout. 
Sea-level to 2500 ft. 
Also abundant in Australia and Tasmania. The rhachilla is seldom produced at 
the back of the palea, so that the plant technically falls into Agrostis. But it is so 
closely allied to D. avenoides, which is an undoubted Deyeuxia, that I have decided 
to leave it in that genus. } 
=> = 
— 2) 
19. DICHELACHNE Endl. »< 2S 
Tall slender grasses. Leaves narrow, flat or convolute. Spikelets 
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 flowering glume 
and palea. ee Sh atts bev Srnncly ye Medcdialorndeon SN . 
The genus is confined to the two following species, both of which extend to 
Australia and Tasmania. 
Panicle dense. Spikelets in. Awn iin., not twisted at the base .. 1. D. crinita. 
Panicle lax. Spikelets ¢ in. — Awn 3-}in., usually twisted at the base 2. D. sciured. 
b_. Bathe p 
1. D. erinita,. Hook. f. Fl. Nov. Zel. 1 (1853) 293.— Annual. Culms 
tufted, tall, slender, erect, 2-3ft. high, leafy at the base. Leaves much 
shorter than the culms, flat or convolute, glabrous or the lower ones some- 
times softly pubescent ; margins smooth or slightly scaberulous; sheaths 
grooved, the upper rather long; ligules short, broad. Panicle very dense 
and spike-like, 3-6 in. long or more, bristling with the numerous awns which 
almost conceal the spikelets, pale-green, shining ; branches numerous, short, 
erect. Spikelets }-+in. long. Two outer glumes more or less unequal, very 
narrow, long-acuminate, membranous or hyaline, keel green and scabrous ; 
8rd 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 4 shorter 
than the flowering glume, linear, 2-nerved.— Hook. f. Handb. N.Z. Fl. 
(1864) 326; FI. Tasm. ii (1860) 111; Benth. Fl. Austral. vu (1878) 574; 
Buch. N.Z. Grasses (1879) t. 16; Cheesem. Man. N.Z. Fl. (1906) 873. 
D. Hookeriana and D. Forsteriana Trin. and Rupr. in Mem. Acad, Petersb. 
Sér. vi, 5 (1842) 3, 4. Agrostis crinita R. Br. Prodr. (1810) 170; A. Rech. 
Fl. Noww. Zel. (1832) 186; A. Cunn. Precur. (1836) n. 246; Raoul Choir 
(1846) 39. Anthoxanthum crinitum Forst. f. Prodr. (1786) n. 18. 
Var. intermedia Hack. MSS.—Rather more slender; panicle narrower and laxer, 
A passage form into D. sciurea. 
Nortu anp SoutH ISLANDS, STEWART ISLAND, CHATHAM ISLANDS: Plentiful in 
dry open situations throughout. Sea-level to 3000 ft. Also abundant in Australia 
and Tasmania, © @~-« ‘eo 
6* 
