Poa.] GRAMINEZ. 907 
Soutn Istanp: Nelson—Lake Tennyson, T. F’. C.; near Westport, Town 
son! 
Professor Hackel remarks of this species that it is allied to P. anceps, but 
differs markedly in the stoloniferous rhizome, the rhizome of P. anceps being 
invariably tufted and without stolons. The spikelets are also broader, the two 
outer glumes longer in proportion and smoother, and the flowering glumes 
much more hairy at the base and smoother above. P. dipsacea differs in the 
more flaccid habit, larger spikelets, and in the flowering glumes being scabrous 
above. 
11. P. chathamica, Petrie in Trans. N.Z. Inst. xxxiv. (1902) 
394.—Rhizome long, wiry, creeping and rooting among Sphag- 
num, &. Culms 1-2ft. high, often decumbent and branched 
at the base, erect above, rather rigid, smooth, leafy. Leaves 
usually shorter than the culms, narrow, ;4—+in. broad, erect, 
rather coriaceous, tapering to a stiff acute point, flat or con- 
cave, smooth, striate; sheaths compressed, lax, grooved; ligules a 
transverse band of short stiff white hairs. Panicle 14-3in. long, 
linear-oblong to ovate-oblong, rather dense; branches few, usually 
binate, short, slender, capillary, scabrid-ciliate. Spikelets ovate or 
oblong-ovate, compressed, pale-green or purplish, 4+-in. long, 
4—5-flowered. Two outer glumes slightly unequal, about half the 
length of the spikelet, oblong-lanceolate, acute, 3-nerved, scabrid 
on the keel. Flowering-glumes oblong-ovate, obtuse or subacute, 
prominently 5-nerved, minutely scaberulous on the surfaces and 
nerves, keel usually strongly scabrid, callus and lower part of keel 
and margins with sparse crisped woolly hairs. Palea about as long 
as the glume, bidentate, strongly ciliate on the keels. Anthers long, 
linear. 
CuHatHam Isuanps: Abundant in Sphagnum swamps, Cox and Cockayne ! 
Closely allied to P. anceps, but sufficiently distinct in the creeping rhizome, 
more coriaceous erect leaves, ligule composed of short stiff hairs, and short 
dense panicle with few branches and rather large spikelets. 
12. P. czespitosa, Forst. Prodr. n. 498.—Culms densely tufted, 
forming compact tussocks, pale yellowish-green, slender, erect, 
smooth and polished, 1-3ft. high. Leaves longer or shorter than 
the culms, very narrow, often filiform, usually with the margins 
strongly involute so that the leaf is nearly terete, rarely flat, strict, 
wiry, erect, pungent, smooth and polished; sheaths long, smooth 
and shining; ligules almost obsolete, reduced to a narrow transverse 
rim. Panicle 2—9in. long, broad or narrow, lax; branches few, in 
distant whorls or clusters, or in small specimens binate or solitary, 
sparingly divided, spreading, capillary, scabrid. Spikelets pale- 
green, about +in. long, 3-6-flowered. Two outer glumes unequal, 
about # the length of the flowering glumes above them, ovate- 
lanceolate, acute, membranous, 3-nerved, smooth or scabrid on the 
keel. Flowering glumes oblong-lanceolate to oblong-ovate, sub- 
acute or obtuse, prominently 5-nerved, minutely scaberulous, callus 
