Page:Manual of the New Zealand Flora.djvu/198

158

1. C. antarctica, ''Engelm. ex Hegelm. in Verh. Bot. Ver. Brandenb.'' ix. (1867) 20.—Stems creeping and rooting, rather stout, succulent, densely matted, 2–6 in. long. Leaves fleshy, $1⁄5$–$1⁄2$ in. long, narrow obovate-spathulate or oblong-spathulate, rounded at the tip, narrowed into a rather long petiole. Fruit sessile, broadly oblong or almost orbicular, somewhat turgid, not winged, the edges subacute or almost obtuse, separated by a shallow groove, so that each pair of lobes is united by almost three-quarters of their faces.—''Kidder in Bull. U.S. Nat. Mus.'' iii. 23; Kirk, Students Fl. 156. C. verna, ''var. b terrestris, Hook. f. Fl. Antarct.'' i. 11.

2. C. verna, Linn. Fl. Suec. ii. n. 3.—Usually floating in still water. Stems slender, sparingly branched, 3–12 in. long. Leaves ½–¾ in. long, linear-spathulate or oblong-spathulate or obovate, rounded or retuse at the tip, very thin and membranous. Fruit sessile, rather longer than broad, subcordate, somewhat convex, edges shortly and acutely keeled, groove between the lobes rather shallow.—''Hook. f. Fl. Nov. Zel. i. 64; Handb. N.Z. Fl. 68 (in part); Kirk, Students Fl.'' 156.

3. C. Muelleri, Sond. in Linnæa xxviii. (1886) 229.—Stems filiform, 2–9 in. long, much branched and interlaced, forming broad matted patches on damp soil. Leaves obovate-rhomboid or broadly obovate-spathulate, cuneate at the base, suddenly narrowed into a distinct petiole. Fruit orbicular-obcordate, often broader than long, flattened, margins expanded into a broad pale wing, groove between the lobes deep.—Kirk, Students' Fl. 156. C. verna var. b, ''Hook. f. Fl. Nov. Zel'' i. 64. C. macropteryx, ''Hegelm. Monog. Callit.'' 59, t. iv. f. 2. C. microphylla, ''Col. in Trans. N.Z. Inst.'' xx. (1888) 190.

Common from the North Cape southwards. Sea-level to 2500 ft. Also in Australia.