168 GRAMINEAE. [ Deschampsia. 
7. D. penicillata 7. Kirk in Trans. N.Z. Inst. xxvii (1895) 354.— 
Culms tufted, slender, glabrous, leafy, 3-6in. high. Leaves shorter than 
the culms, radical and cauline ; blades short, ?-14in. long, narrow, flat or 
involute, striate; sheaths pale, membranous, deeply grooved, the upper- 
most long, enclosing the culm up to the base of the panicle ; ligules long, 
pointed, scarious, broader than the blade at the base. Panicle small, 1-2 in. 
long, few-flowered ; branches few, capillary, the lower ones bearing 2-3 
spikelets, the upper i-spiculate. Spikelets $-g1in. long, pale yellow-green, 
shining, 2-flowered. Two outer glumes almost equalling the flowering 
glumes, subequal, oblong-lanceolate, subacute, hyaline, 3-nerved ; 3rd and 
4th or flowering glumes oblong, very delicate, with white hyaline tips, 
5-nerved, silky at the base, obtuse or almost truncate at the tip and 
irregularly minutely denticulate, awn wanting. Palea_linear-oblong, 
2-nerved, nerves silky. Rhachilla elongated between the flowering glumes 
and produced beyond the upper flower into a bristle bearing a minute 
empty glume at its summit, silky throughout.—Cheesem. Man. N.Z. Fl. 
(1906) 879; Vascl. Fl. Macquarne Is. (1919) 34. 
MacqQuaRiE Istanpd: In swamps, A. Hamilton! 
I regret that I have only seen two small and immature specimens of this curious 
little plant, which is by no means closely related to any other New Zealand species. 
21. TRISETUM Pers. 1305 
Perennial or rarely annual grasses. Leaves flat. Spikelets rather 
small, usually 2-flowered, more rarely 3-6-flowered, arranged in a narrow 
dense or lax panicle; rhachilla disarticulating above the 2 outer glumes, 
more or less produced between the flowering glumes and beyond the upper 
flower into a short bristle. Two outer glumes persistent, empty, equal 
or unequal, acute, keeled, I-3-nerved. Flowering glumes 2-3, rarely 
more, equalling or exceeding the empty glumes, membranous with broad 
hyaline margins, 2-toothed at the apex, the teeth often produced into 
bristles or short awns; dorsal awn from the back below the tip, slender, 
straight or bent, often twisted at the base. Palea strongly 2-nerved, 
2-toothed. Stamens 5. Styles very short, distinct; stigmas plumose. 
Grain enclosed within the flowering glume and palea, free. 
A genus of about 60 species, most plentiful in the North Temperate Zone, but also 
found on the high mountains of the tropics and in South America and Australasia. One 
of the New Zealand species is widely spread, the rest are endemic. 
* Awn at least as long as the glume, inserted on the back a little distance below 
the tip. 
Glabrous or sparsely pubescent, 6-24in. Panicle 2-10in., rather 
Jax. Empty glumes lanceolate, unequal a a .. Ll. LT. antarcticum. 
Pilose, 2-3 ft. Panicle 2-10in., very slender. Empty glumes 
oblong or oblong-obovate, subequal 2. sae .. 2. T. Youngit. 
Puberulous or tomentose, 2-12in. Panicle dense, cylindric, 4-2 in. 3. T. subspicatum. 
** Awn very short, from between the terminal teeth of the glume. 
Puberulous, 6-12 in. Panicle dense, cylindric, 1-3 in. Teeth of 
flowering glumes short Be “ ve .. 4. 7. Cheesemanii. 
\ “son y+ “) 
1. T. antareticum Trin. on Mém. Acad. Petersb. Sér. vi, 1 (1831) 61.— 
Perennial, ver¥ variable in size and degree of robustness. Culms tufted, 
slender, smooth or sparsely pubescent, 6-24 in. high. Leaves usually 
shorter than the culms, narrow, kin. broad, flat or involute, flaccid, 
smooth or the margins finely scaberulous ; sheaths long, narrow, grooved ; 
