i. 82; Handb. N.Z. Fl. 86; Benth. Fl. Austral. iii. 346; Kirk, Students' Fl. 190. H. cordifolia, Hook. f. Ic. Plant. t. 303. H. uniflora, Col. in Trans. N.Z. Inst. xvii. (1885) 239.
North and South Islands, Stewart Island, Chatham Islands: Abundant in moist places from the Three Kings Islands and the North Cape southwards, ascending to 2500 ft. October–March. Also in most tropical and subtropical countries.
2. AZORELLA, Lam.
Perennial herbs, densely tufted or slender and creeping. Leaves simple or 3–5-foliolate, all radical, or fascicled at the nodes of creeping stolons, or cauline and densely imbricated. Umbels few- or many-flowered, simple or irregularly compound; involucral bracts free or connate. Calyx-teeth prominent, usually small, acute. Petals obtuse or acute, imbricate. Disc thick, flat, often confluent with the styles. Fruit but slightly laterally compressed, almost tetragonous, the sides furrowed at the commissure when mature. Carpels subterete or dorsally compressed, with 5 more or less prominent and almost equidistant ribs, the lateral ones not close to the commissure.
A genus comprising about 40 species, found in Andine and extra-tropical South America, Australia and Tasmania, the Antarctic islands, and New Zealand. With the exception of A. Selago, all the New Zealand species are endemic.
| Section I. (Fragosa). Stems closely compacted, forming rounded pulvinate masses. | |
| Leaves all cauline, imbricate; blade 3–5-partite | 1. A. Selago. |
| Section II. (Schizeleima). Stems tufted, often emitting creeping stolons or leafy flowering branches. | |
| * Leaves simple. | |
| Minute, forming tufts ½–2 in. diam. Leaves 16–14 in. diam., entire or crenate | 2. A. exigua. |
| Leaves reniform, ⅓–¾ in. diam. Stipules entire. Umbels 3–8-flowered. Pedicels shorter than the fruits | 3. A. reniformis. |
| Leaves reniform, ⅓–2 in. diam. Stipules ciliate. Umbels many-flowered. Pedicels longer than the fruits | 4. A. Haastii. |
| ** Leaves 3–5-foliolate. | |
| Leaves tufted, coriaceous, ½–1½ in. diam; leaflets 3–5, deeply crenate-toothed or lobed | 5. A. Roughii. |
| Leaves crowded at the nodes of creeping stolons, excessively coriaceous, ¼–⅔ in. diam.; leaflets bluntly lobed or crenate | 6. A. hydrocotyloides. |
| Leaves tufted, pale-green, membranous, ⅓–¾ in. diam.; leaflets 3, toothed at the tips | 7. A. pallida. |
| Small, densely matted. Leaves 16–13 in. diam.; leaflets 3, entire or obscurely toothed | 8. A. nitens. |
| Creeping. Leaves fascicled at the nodes, membranous, ⅓–¾ in. diam.; leaflets 3, stalked, obscurely toothed | 9. A. trifoliolata. |
