Hydrocotyle.| UMBELLIFERS. 199 
i. 82; Handb. N.Z. Fl. 86; Benth. Fl. Austral. iii. 346; Kirk, Stu- 
dents’ Fl. 190. H. cordifolia, Hook. f. Ic. Plant. t. 303. H. uni- 
flora, Col. in Trans. N.Z. Inst. xvii. (1885) 239. 
NorrH AnD Sout Isztanps, Stewart IstaANpD, CHaTHAmM IsLANDS: Abun- 
dant in moist places from the Three Kings Islands and the North Cape south- 
wards, ascending to 2500ft. 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 creep- 
ing 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 Zea- 
land. With the exception of A. Selago, all the New Zealand species are 
endemic. 
Section I. (Fragosa). Stems closely compucted, 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 
jlowermg branches. 
* Leaves simple. 
Minute, forming tufts 4-2in. diam. Leaves ze in. diam., 
entire orcrenate .. 2. A. exigua. 
Leaves reniform, 4—#in. diam. Stipules entire. Umbels 
3-8-flowered. Pedicels shorter than the fruits .. 3. A. reniformis. 
Leaves reniform, 4-2in. diam. Stipules ciliate. Umbels 
many-flowered. Pedicels longer than the fruits .. 4. A. Haasti. 
** Leaves 3-5-foliolate. 
Leaves tufted, coriaceous, 4-1din. diam; leaflets 3-5, 
deeply crenate-toothed or lobed ; 5. A. Roughit. 
Leaves crowded at the nodes of ogee stolons, ‘excessively 
coriaceous, #-%in. diam.; leaflets bluntly lobed or 
crenate .. 6. A. hydrocoty- 
Leaves tufted, pale- -green, membranous, 4-3in. diam. ; loides. 
leaflets 3, toothed at the tips 7. A. pallida. 
Small, densely matted. Leaves 4-4in. "diam. ; ‘leaflets 3, 
entire or obscurely toothed . .. 8. A. nitens. 
Creeping. Leaves fascicled at the nodes, membranous, 
4-2 in. diam. ; leaflets 3, stalked, obscurely toothed 9. A. trifoliolata. 
