3. H. dissecta, Hook. f. Fl. Nov. Zel. i. 84.—Small, slender, matted, more or less hispid-pilose. Stems much branched, creeping and rooting, 3–9 in. long. Leaves alternate or in alternate fascicles, ⅓–1 in. diam., orbicular or orbicular-reniform, 3–7-lobed almost to the base; lobes obovate-cuneate, acutely toothed or almost laciniate, hairy on both surfaces; petiole ½–1½ in. long. Peduncles variable in length, ½–2 in. long, longer or shorter than the leaves; umbels 20–40-flowered. Flowers small, sessile. Fruit densely crowded, small, red-brown, glabrous; carpels somewhat turgid, with one obtuse rib on each face; margins acute.—Handb. N.Z. Fl. 86; Kirk, Students' Fl. 188.
North Island: Near Maunganui Bluff, Petrie! Northern Wairoa, T.F.C.; Whangarei, Carse! Petrie! T.F.C.; Matakana, Kirk! Hunua, Kirk! T.F.C.; Lower Waikato, Carse! Hawke's Bay, Colenso. South Island: Marlborough, Macmahon! near Westport, Townson! Otira Valley and Catlin's River, Petrie! Sea-level to 1200 ft. November–February.
A well-marked plant, perhaps more closely allied to H. moschata than to any other, but differing widely in the deeply and sharply lobed leaves. Mr. Carse sends a form with proliferous umbels.
4. H. americana, Linn. Sp. Plant. 234.—Small, very slender, matted, pale-green and glistening, glabrous or with a few loose hairs on the petioles. Stems 3–6 in. long, filiform, much branched. Leaves very delicate and membranous, ¼–¾ in. diam., orbicular-reniform, 5–7-lobed: lobes shallow, crenate; petioles ½–1½ in. long; stipules small. Umbels small, 3–6-flowered, sessile in the axils of the leaves or very shortly peduncled. Flowers sessile or nearly so. Fruit minute, pale yellowish-brown, glabrous, or one or both carpels more or less hispid; carpels wath one rib on each face, margins acute.—Hook. f. Fl. Nov. Zel. i. 82; Handb. N.Z. Fl. 85; Kirk, Students' Fl. 187.
Var. heteromeria, Kirk, l.c. 188.—Rather larger. Leaves ½–1 in. diam.; petioles often 2 in. long. Umbels usually shortly peduncled; peduncles sometimes half the length of the petioles. Fruit as in the type.—H. heteromeria, A. Rich. Hydrocot. 200; A. Cunn. Precur. n. 499; Hook. f Fl. Nov. Zel. i. 82; Handb. N.Z. Fl. 86. H. nitens, Col. in Trans. N.Z. Inst. xxiii. (1891) 386.
North and South Islands, Stewart Island: Not uncommon from the North Cape southwards. Sea-level to 2000 ft. October–February. The typical form is also found in North and South America.
5. H. pterocarpa, F. Muell. in Trans. Vict. Inst. i. (1855) 126.—Smooth, often shining, perfectly glabrous or sparingly pilose. Stems slender, 6–14 in. long, branched, creeping and rooting. Leaves ½–1 in. diam., orbicular-reniform with a narrow or closed sinus, very thin and membranous, obscurely 3–7-lobed; lobes
