86 FLORA OF TASMANIA. [ Cyperacee. 
a. Spikelet terminal. Nut much compressed. Stamens and stigmas two. 
1. Isolepis fluitans (Br. Prodr. 221); culmis flaceidis ramosis foliatis natantibus, foliis lineari- 
setaceis canaliculatis, spiculis ovatis 3-7-floris, squamis ovato-oblongis obtusis 3-andris, nuce elliptica 
compressa, stigmatibus 2.—Xunth, En. ii. 188. Eleogiton fluitans, Zink, Hort. i. 284. Scirpus fluitans, 
Linn. Sp. Pl. i. 71; Eng. Bot. t. 216. (Gunn, 1430.) 
Var. 8; spiculis foliorumque vaginis atro-castaneis. (Gunn, 1429.) 
Var. y. terrestris, F. Mueller; culmis ceespitosis abbreviatis erectis, foliis culmo eequilongis, squama 
inferiore elongata bracteam referente. (Gunn, 1413, 1420.) 
Has. Abundant in rivers and pools throughout the Island. Var. 8. Yorktown rivulet, Gunz. 
Var. y. Western Mountains and Arthur's Lakes, Gunn. 
DisrRis. Extratropical Australia, South Africa, and temperate Europe and Asia. 
In its usual state this forms dense, matted, floating patches of almost capillary culms and leaves.—Spikelefs 
pale, narrow-ovate, 4 inch long. Scales green on the back, ovate-lanceolate or ovate-oblong, blunt; the lower 
empty, and sometimes produced beyond the spikelet. Nut compressed, white, with two styles.—In the var. B the 
spikelets and sheaths of the leaves are a dark chestnut-brown, almost black. The var. y. terrestris so closely agrees 
with Brown's character of Isolepis inundata, that I have doubts whether it may not be a state of that plant. 
2. Isolepis crassiuscula (Hook. fil.) ; culmis cespitosis fluitantibus v. emersis erectis, spiculis 
ovatis castaneis, squamis 12-15 late ovato-oblongis apice rotundatis, apices versus membranaceis 3-andris, 
nuce elliptica valde compressa pallida, stigmatibus 2. (Gunn, 1431.) (Tas. CXLIII. 4.) 
Has. Alpine situations: Arthur's Lakes and Mount Wellington, Guzz.—(Fl. Jan.) 
DisrarB. South Africa ? 
Much larger and stouter than Æ. fluitans, and apparently not floating, some of my specimens being evidently 
terrestrial, though growing in marshes.—Culms 6-10 inches long. Leaves as in E. fluitans, but coarser. Spikelets 
i inch long, ovate, acute, of twelve to fifteen blunt scales, which are chesnut-brown above the middle. Lower 
scale fertile, sometimes with a short mucro.—Apparently identical with a South African species, whose name I 
cannot determine.—PrLATE CXLIII. 4. Fig. 1, spikelet; 2, scale and flower; 3, pistil and stamen; 4, nut :—all 
magnified. 
3. Isolepis lenticularis (Br. Prodr. 222) ; culmis cespitosis setaceis capillaribusve basi unifoliis, 
spicula solitaria terminali ovato-lanceolata compressa, squamis 6-10 ovato-oblongis lanceolatisve superiori- 
bus obtusis vix carinatis diandris, nuce ovali-oblonga lenticulari valde compressa alba levi, stigmatibus 2. 
(Gunn, 1424.) (Tas. CXLV. D.) 
Has. Moist ground near Formosa, Guzz.— (Fl. Dec.) 
Distris. New South Wales. 
I have several good specimens of this plant, but from one locality only, and though from these it certainly 
appears to bea very distinct and well marked species, specimens from different situations may modify this opinion. 
It is a good deal like Z. cartilaginea, and of the same size, habit, and aspect, but the solitary, pale-green spikelet is 
more terminal, larger, more ovate-lanceolate, and apparently compressed ; the scales are not so carinate and nerved, 
more lanceolate, and the white, oval, oblong, very compressed nut is of a totally different form and character. All 
my specimens are diandrous, and have bifid styles. —PrATE CXLV. D. Fig. 1, spikelet; 2, scale and flower; 3, 
nut :—all magnified. 
b. Spikelets lateral or terminal. Stamens one to three. Nut trigonous or triquetrous. 
4. Isolepis alpina (Hook. fil.); densissime cespitosa, 2-pollicaris, robusta, culmis erectis spiculas 
longe superantibus foliis numerosis lineari-subulatis obtusis brevioribus, spicula solitaria laterali (raro ter- 
