Sée The. Arawre Teun A wr) hi bnew * 1.2. Si-raheao Brun. J. et. 
YING > Iq Se. Upvr~ bys. S Spb. 4tcoc4.- Sree 
2S. Qurenca. 
Trisetum. | GRAMINEAE. 171 
it necessary to expunge 13 species of T’risetum that had been, according to his views, 
erroneously placed in Koeleria. The excellent botanist Boissier, in his classic *‘ Flora 
Orientalis,”” described the same species in one part of his work as a Koeleria, and in 
another as a T'risetum/ Personally, I regard the position of T'risetum Cheesemanii as 
very much a matter of taste. Its resemblance to Koeleria is admitted; but its 
equally great resemblance to T'risetum subspicatum must also be taken into account, 
22. AMPHIBROMUS Nees. /% & &. - 
Slender glabrous grasses. Leaves fiat. 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. 
i. A. fluitans 7. 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 2-4 in. long, 
narrow, lax, few-flowered ; branches few, short, capillary, scaberulous, 
the lowermost with 2-3 spikelets, the upper I-spiculate. Spikelets com- 
pressed, pale-green, usually about 4 in. long without the awns, 4—7-flowered. 
T'wo outer glumes unequal, small, the upper not one-half the length of 
the flowering glume above it. Flowering glumes silky at the base, firm ° 
and rather rigid when in fruit, 5-7-nerved, scabrous on the back and sides; 
awn from the middle of the back, long, straight, scabrid, not bent nor 
twisted. Palea hyaline, 2-nerved, strongly ciliate on the nerves. — 
Cheesem. Man. N.Z. Fl. (1906) 882. 
Nort Istanp: Auckland—Marshes near Waiuku, H. Carse / Lakes Whangape 
and Waikare, 7. F.C. ; Lake Waihi, T. Kirk! Taranaki—Swamps near New Plymouth, 
PES oslang dake Tek wpe Wh. = Ae Allon Tings 6S RABE 
Distinguished from the Australian A. Neesii by the weak decumbent habit, smaller 
panicle, narrower spikelets, shorter outer glumes, and straight awn. | 
- 
al 
23. DANTHONIA D.C. (°°% 
Perennial or rarely annual grasses. Leaves very variable. Spikelets 
3- to many-flowered, laterally compressed, arranged in a lax or dense 
panicle, rarely in a simple raceme; rhachilla disarticulating above the 
2 outer glumes and between the flowering glumes, produced beyond the 
uppermost flower. Two outer glumes persistent, empty, equal or more 
or less unequal, keeled, acute or acuminate, 3-7-nerved, as long as the 
whole spikelet or slightly shorter. Flowering glumes 2 or more, rounded 
on the back, usually ciliate on the margins, 5-9-nerved, hairy, the hairs 
often collected into variously arranged tufts, 2-lobed at the tip, the 
lobes often produced into short awn-like bristles; awn from the sinus 
between the lobes, usually long and rigid and twisted, rarely reduced to 
