882 GRAMINE,. [Trisetum. 
4. T. Cheesemanii, Hack. in Trans. N.Z. Inst. xxxv. (1903) 
381.—Culms rather stout, erect, 3-12in. high, naked and puberu- 
lous above, leafy below, 2-noded, the upper node in the lower + of 
the culm. Leaves crowded at the base of the culms, flat, 4,4 in. 
broad, firm, erect, glaucous, finely scaberulous on the veins and 
margins ; sheaths rather lax, subcompressed, minutely puberulous ; 
ligules short, truncate, denticulate. Panicle very dense, cylindrical, 
1-24 in. long, 4in. broad; rhachis tomentose ; branches densely 
imbricate, short, binate or ternate. Spikelets elliptic-lanceolate, 
compressed, whitish-yellow, shining, 2-flowered, about +in. long. 
Two outer glumes slightly unequal, lanceolate, acute, scabrid on the 
keel, minutely rough on the sides, the lower 1l-nerved, the 2nd 
3-nerved. Flowering glumes lanceolate, very shortly 2-cuspidate, 
slightly hairy at the base, minutely rough, faintly 5-nerved; awn 
very short indeed, from between the terminal teeth or just below 
them. Palea + shorter than the glume, scabrid along the nerves. 
Rhachilla produced between the flowering glumes and beyond the 
upper flower, silky. 
NorrH Istanp: Mount Hikurangi, Petrie! Sourn Isntanp: Canterbury— 
Craigieburn Mountains, Petrie! Cockayne! Hooker Glacier, T. 7. C. Otago— 
Petrie! 3000-5000 ft. 
This has much of the habit and appearance of T. subspicatwm, but differs 
from it, and from all the other species, in the very shortly bidentate flowering 
glume, with the intermediate awn springing almost from between the teeth, not 
from the back some distance below the teeth, as is usual in the genus. 
22. AMPHIBROMUS, Nees. 
Slender glabrous grasses. Leaves flat. Spikelets 5-10-flowered, 
arranged in a lax panicle; rhachilla slender, hairy, jointed between 
the flowers. Two outer glumes persistent, empty, acute, keeled, 
5-nerved at the base, with scarious margins, awnless. Flowering 
glumes more rigid, rounded on the back, prominently 5-nerved, 
often split at the tip with the lobes produced into short awns; 
dorsal awn from about the middle of the back, straight or bent, 
often twisted. Palea thin, 2-toothed. Stamens 3. Styles short, 
distinct ; stigmas plumose. Lodicules 2. Grain oblong, glabrous, 
enclosed within the flowering glume and palea. 
A small genus of 2 species, the present one and another endemic in 
Australia. 
1. A. fluitans, T. Kirk in Trans. N.Z. Inst. xvi. (1884) 374, t. 
28.—Culms weak, branched, creeping and rooting at the base, erect 
or floating above, glabrous, 12-18in. long. Leaves numerous, 
sheathing the culm up to the base of the panicle, narrow, flat, 
minutely scabrid on the margins and veins; sheaths rather broad 
and lax, compressed, grooved, longer than the internodes ; ligules 
long, pointed, hyaline. Panicle 2-4in. long, narrow, lax, few- 
