soley. Tans 73 2 234, meres Dedsache a Deyenam 
162 GRAMINEAE. [ Deyeuara. 
Norra anp Sours Istanps, Stewart Isuanp: Var. brachyantha common through- 
out, ranging from sea-level to 3500 ft., the typical state apparently confined to 
mountain districts in the South Island, through which it appears to be generally 
distributed. Nelson—Wairau Gorge, 7. F. C. Canterbury—Craigieburn Mountains, 
Petrie! Rangitata Valley, Sinclair and Haast; Tasman Valley, 7. F. C. Otago— 
Not uncommon in upland districts, Hector and Buchanan ! Petrie! Cockayne ! 
The typical state is well characterized by its large spikelets, which no doubt 
induced Hooker to give it the name of avenoides ; but the var. brachyantha is an 
exceedingly puzzling form. Professor Hackel has no hesitation in placing it under 
D. avenoides, but most New Zealand botanists, including myself, have been accustomed 
to regard it as a state of D. quadriseta, to which it seems to show a very near approach, 
principally differing in the rather larger spikelets, with the rhachilla always produced 
at the back of the palea. It appears to me to be very much a matter of taste whether 
it should be placed under D. avenoides or D. qguadriseta. 
t 
6. D. Youngii Buch. N.Z. Grasses (1880) 6, t. 25.—A tall perennial 
species. Culms erect, terete, glabrous, 1-4 ft. high, 3-noded, the upper- 
most node near the middle of the culm. Leaves much shorter than 
the culms, 4-}in. broad, flat, smooth and glabrous or scaberulous on the 
upper surface, rather flaccid ; sheaths long, close, terete, minutely scabe- 
rulous; ligules oblong, obtuse. Panicle 3-6 in. long, narrow, sometimes 
dense and cylindric, but frequently open below ; rhachis smooth ; branches 
short, erect, binate or ternate, sparingly divided ; pedicels shorter than the 
spikelets, smooth. Spikelets } in. long, pale-green. Two outer glumes sub- 
equal, narrow-lanceolate, acute, rigidly membranous, 1-nerved, scabrid on 
the keel; 3rd or flowering glume about % shorter, lanceolate, acute, denti- 
culate at the tip, scabro-punctate on the back, callus with silky hairs 4 as 
long as the glume; awn short, almost terminal. Palea nearly as long as 
the glume. Rhachilla produced into a hairy bristle behind the palea, about 
1 its length —Cheesem. Man. N.Z. Fl. (1906) 871. Agrostis Youngii Hook. j. 
Handb. N.Z. Fl. (1864) 330; Buch. N.Z. Grasses (1879) t. 25. 
Var. Petriei Petrie in Trans. N.Z. Inst. xlvii (1915) 57.—Awn arising from the 
middle of the back of the flowering glume, not terminal. Other characters as in the 
type.—D. Petriei Cheesem. Man. N.Z. Fl. (1906) 872. Calamagrostis Petriei Hack. i 
Trans. N.Z. Inst. xxxv (1903) 380. 
Sourn Isnanp: Canterbury—Dry hillsides at the sources of the Waitaki River, 
Haast ; Hooker Valley, Mount Cook district, Petrie! Mount Peel, 7. H. Allan! Var. 
Petriei: Slopes of Mount Herbert, A. Wall! Otago—Swampy Hill, near Dunedin, 
Petrie! A. Wall! Mount Pisa, Petrie. 1500-3500 ft. 
a 
7. D. quadriseta patty Fl. Austral. vii (1878) 581—Culms tufted, 
erect, stout or slender, smooth or rather rough, 1-3 ft. high. Leaves much 
shorter than the culms, variable in width, sometimes $in. broad and quite 
flat, at other times very narrow and setaceous or filiform, often involute, 
glabrous or minutely scaberulous; sheaths smooth or rough, grooved ; 
ligules oblong, membranous. Panicle 13-6 in. long, very narrow and spike- 
like, dense, cylindric, rarely broader and obscurely lobed, pale-green or 
brownish-green, shining; branches numerous, short, erect, branched from 
the base. Spikelets small, about } in. long, shortly pedicelled. ‘Two outer 
glumes subequal, lanceolate, acuminate, keeled, keel minutely scabrid, 
slightly hairy at the base, tip minutely but distinctly 4-awned ; dorsal 
awn attached below the middle, sometimes almost basal, usually not much 
longer than the outer glumes. Palea almost as long as the flowering glume, 
narrow, 2-nerved. Rhachilla either not at all produced at the back of the 
palea or very obscurely so.—Cheesem. Man. N.Z. Fl. (1906) 872. Agrostis 
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