4. A. Haastii, Benth. and Hook. f. l.c.—Exceedingly variable in size, 1–10 in. high. Rhizome stout, branched, with tufts of radical leaves at the tips, often with prostrate or ascending leafy and flowering branches. Leaves ⅓–2 in. diam., reniform or orbicular with usually an open sinus, glabrous or sparingly setose, coriaceous or almost fleshy, bright-green and glossy, crenate-lobed; lobes broad, shallow, rounded; margins thickened, almost cartilaginous; petioles variable in length, ½–8 in.; stipules broad, usually more or less ciliate at the tips. Umbels peduncled, many-flowered, often 1–3 secondary ones arising from the base of the primary one and far exceeding it; floral leaves cuneate, 3–4-toothed or -lobed; involucral bracts linear-oblong, obtuse. Pedicels usually much longer than the oblong tetragonous fruit; carpels obscurely 5-ribbed.—Kirk, Students' Fl. 192. Pozoa Haastii, Hook. f. Handb. N.Z. Fl. 88. Pozoa elegans, Col. in Trans. N.Z. Inst. xxiii. (1891) 386.
North Island: Ruahine Mountains, A. Hamilton! South Island: Not uncommon in mountain districts from Nelson to Otago, altitude 2000–5000 ft. December–February.
This varies much in most of its characters, and as a species is doubtfully distinct from A. reniformis. Ordinarily, however, it can be separated from that plant by the ciliate stipules, many-flowered umbels, and long fruiting pedicels. But the stipules are sometimes entire, and dwarf specimens frequently have short pedicels. Mr. Colenso's Pozoa elegans (as proved by the type specimens in his herbarium, labelled in his own handwriting) is founded upon the tips of the flowering shoots of A. Haastii. He describes the leaves as "2–3-foliolate," having evidently mistaken the approximate floral leaves for parts of a compound leaf.
5. A. Roughii, Benth. and Hook. f. l.c.—Perfectly glabrous, smooth and shining. Rhizome stout, branched, terminated by numerous radical leaves, and usually with prostrate or ascending leafy flowering branches. Leaves ½–1½in. diam., orbicular or reniform, coriaceous, 3–5-foliolate or -partite; leaflets sessile, broadly obcuneate, deeply crenate-toothed or lobed at the tip; lobes rounded; petioles 1–6 in. long; stipules usually laciniate. Flowering shoots often exceeding the leaves; umbels many-flowered, usually 1–3 secondary ones arising from the base of the primary and overtopping it; involucral bracts linear-oblong, obtuse. Pedicels usually longer than the linear-oblong fruit; carpels rounded at the back, 5-ribbed.—Kirk, Students' Fl. 192. Pozoa Roughii, Hook. f. Handb. N.Z. Fl. 89.
South Island: Mountains of Nelson and Marlborough, from Dun Mountain to the Upper Clarence and Waiau, not uncommon. 2500–5000 ft. December–February.
This has the same habit as A. Haastii, but can always be recognised by the divided leaves. I have seen no specimens from the south of Lake Tennyson and the Upper Waiau.
