160 GRAMINEAE. | Deyeuxra. 
D. Forsteri is one of the most generally diffused plants in New Zealand, and is 
certainly one of the most variable. In attempting to characterize its chief forms I 
have mainly followed the grouping suggested to me by Professor Hackel, who has 
kindly examined sets of all the varieties contained in my herbarium. ‘The species is 
as plentiful in Australia and Tasmania as in New Zealand. As the earliest name of 
this plant is undoubtedly Forster’s Avena filiformis, Dr. Cockayne, in his florula of 
Stewart Island (p. 49), has changed the specific name to filiformis. But this is 
inadmissible, as a valid earlier name of filiformis has already been used in both 
Calamagrostis and Deyeuxia. (Calamagrostis filiformis Griseb. in Goett. Nachr. (1868) 
78; Deyeuxia filiformis Hook. ft. Fl. British India, vii (1897) 268.) 
2. D. glabra Petrie in Trans. N.Z. Inst. xlvi (1914) 36.—Smooth, slender, 
laxly tufted, sparingly branched from the base. Culms 6-12in. long, 
slender, weak, sparingly leafy. Leaves remote, the upper ones the longest, the 
lower gradually reduced in size ; smooth, flat, striate, bright-green. Sheaths 
long, grooved; ligules long, narrow, membranous, lacerate at the tip. 
Panicle usually lax and spreading when mature, contracted in the young 
state: branches in distant whorls or clusters, finely capillary, minutely 
scaberulous. Spikelets few, on very slender pedicels, small, 7-3’; 1m. long, 
pale-green. Two outer glumes subequal, lanceolate, acute, membranous, 
faintly 1-nerved, finely scabrid or ciliate on the keel; 3rd or flowering 
glume 4-4 shorter, oblong, truncate and denticulate at the tip, quite 
glabrous, membranous, faintly 3-nerved ; awn short, slender, barely equalling 
the tip of the outer glumes. Palea narrow-linear, bifid at the apex. 
Rhachilla short, sparingly pilose. 
Sourn Isutanp: Moist places near the sea at Bluff and Fortrose, Southland, 
Petrie / 
Mr. Petrie states that this can be ‘“‘ readily distinguished from D. Forsteri by the 
glabrous flowering glumes, the short delicate awn, and the absence of a tuft of hairs 
at the base of the flowering glume.’’ But I think there can be little doubt that it is 
only a variety of D. Forsteri in which the hairs at the base of the flowering glume 
are absent. There are no other points of difference of any importance, and it is well 
known that the a the OAS glume of Deyeuxia form a very variable character. 
\ &. 9%. ) 
3. D. Billardieri, Kunth Rev. Gram. i (1829) 77.—Culms tufted, usually 
rather stout, erect or*decumbent at the base, 9-18in. high, leafy 
throughout. Leaves shorter than the culms, }-4in. broad, flat, striate, 
usually scabrid on the margins and veins; sheaths rather narrow, rough, 
the uppermost very long, usually enclosing the culm up to the base of 
the panicle ; +ligules long, membranous, lacerate. Panicle 4-12 in. long, 
very broad and lax, often as broad as long when fully expanded ; branches 
numerous, in regular whorls, long, capillary, scabrid, trichotomously divided ; 
pedicels thickened at the tips. Spikelets 4Lin. long, green or purplish. 
Two outer glumes slightly unequal, narrow-lanceolate, acuminate, 1-nerved 
or 3-nerved with the lateral veins very short, scabrid on the keel and 
sides; 3rd or flowering glume 4-4 shorter, oblong, truncate, silky at the 
base, 5-nerved, the 2 lateral nerves produced on each side into short awns, 
the 2 outer of which are longer than the 2 inner; dorsal awn from below 
the middle, straight or bent, usually exceeding the spikelet. Palea about 
% as long as the flowering glume, linear, 2-nerved. Rhachilla produced 
into a silky bristle almost as long as the palea.—Hook. f. Fl. Nov. Zel. 1 
(1853) 298; Benth. Fl. Austral. vii (1878) 580; Buch. N.Z. Grasses (1880) 
6 ; Cheesem. Man. N.Z. Fl. (1906) 869; Ill. N.Z. Fl. ii (1914) t. Jytey 
Agrostis Billardieri R. Br. Prodr. (1810) 171; <A. Rich. Fl. Now. Zel. 
(1852) 130; A. Cunn. Precur. (1836) n. 252; Raoul Choix (1846) 39; 
Hook. f. Handb. N.Z. Fl. (1864) 329; Buch. N.Z. Grasses (1879) t. 28. 
Calamagrostis Billardieri Cockayne in Bot. Stewart Is. (1909) 49. 
