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26 membranous. Petals 5–8, spathulate, with a single gland near the middle. Achenes forming a small rounded head ⅓ in. diam., turgid, glabrous; style short, subulate, straight or nearly so.—''A. Cunn. Precur. n. 631; Raoul, Choix de Plantes, 47; Hook. f. Fl. Antarct. i. 4, t. 2; Fl. Nov. Zel. i. 11; Handb. N.Z. Fl. 8; A. Gray, Bot. U.S. Exped. 7; Kirk, Students' Fl.'' 18. R. stenopetalus. ''Hook. Ic. Plant.'' t. 677.

35. R. crassipes, Hook. f. Fl. Antarct. ii. 224, t. 81.—Smooth, glabrous, succulent, stems creeping and rooting at the nodes. Leaves on petioles 1–4 in. long; blade cordate-reniform in outline, ⅓–1 in. diam. or more, 3-lobed or 3-partite; segments variable in shape, broad or narrow, cuneate at the base, deeply and irregularly toothed. Peduncles axillary, stout, erect, shorter than the leaves. Flowers small, ¼–⅓ in. diam. Sepals 4–5, ovate, obtuse, membranous. Petals the same number, slightly longer than the sepals, obovate-spathulate, with a gland a little below the middle. Achenes forming a rounded head ⅓ in. diam., broadly ovate, turgid; style short, straight.—Kirk, Students' Fl. 17.

36. R. Limosella, ''F. Muell. ex Kirk in Trans. N.Z. Inst.'' iii. (1871) 177.—Small, slender, perfectly glabrous. Stems filiform, creeping and rooting at the nodes, often forming matted patches. Leaves solitary or in tufts of 2–3 at the nodes, ½-3 in. long, very narrow linear, usually dilated at the tip and subspathulate, obtuse, nerveless. Peduncles filiform, axillary, solitary, much shorter than the leaves. Flowers minute, $1⁄5$ in. diam. Sepals 4, rounded-ovate, membranous. Petals 4, much longer than the sepals, narrow-linear, revolute at the tip; gland some little distance above the base. Achenes 8–12, rounded, somewhat turgid; style long, slender, recurved.—Kirk, Students' Fl. 19. R. limoselloides, ''F. Muell. ex Hook. f. Ic. Plant.'' t. 1081.


 * Auckland—Lakes in the middle Waikato, Kirk! T. F. C. Taranaki—Between Opunake and Normanby, Kirk. : Canterbury—Swamps and lakes in the middle Waimakariri district, Kirk! Enys!