314 PLANTS OF NEW ZEALAND 



Key to Genera. 



1. Umbels simple or irregularly compound, fruit without oil-cavities. 2 

 Umbels usually compound. Oil-cavities in-esent. .5 



2. Fruit compressed laterally, or constricted at the narrow surface of 



junction of the two carpels. '3 



Fruit with broad surface of junction, almost cylindrical. Eryngium, p. 315. 



3. Stems (in the New Zealand species) usually creeping. 4 

 Leaves radical. Actinotus. 



4. Fruits flat. Hydrocotyle.p.SU. 

 Fruits scarcely Ijroader than thick. Azorella, p. 314. 



5. Umbels usually compound, primary ridges only present. 6 

 Umbels compound, secondarj- ridges present, often more strongly 

 developed than the primary. 11 



6. Stems creeping. Umbels simple. Crantzia. 

 Stems erect; sub-erect or climbing. Umbels compound or 



irregularly compressed. 7 



7. Carpels winged. 8 

 Carpels not winged. 10 



8. Stems erect or climbing. Carpels with two bi-oad lateral wings. Angelica, p. 322. 

 Carpels with 3 or 5 wings on each face. 9 



9. Umbels compound. Ligusticum, p. 315. 

 Umbels in erect spikes or panicles. Aciphylla, p. 316. 



10. Ribs 5. Glabrous herbs with lateral or terminal umbels. Apium, )).315. 

 Ribs 5. Usually a hairy plant, umbels borne on a scape. Oreomyrrhis. 



11. Fruit bristly. Daucus. 



Daucus, Oreomyrrhis, Actinotus, and Crantzia are unimportant genera, with 

 inconspicuous flowers, and will not be further noticed here. 



Genus Hydrocotijle. 



A rather large genus of small, creeping herbs, with inconspicuous green 

 flowers. Leaves round or kidney-shaped, often 3-7 lobed. (Name from the 

 Greek, signifying water, and a salver, in allusion to the shape of the leaves in 

 some species). 9 sp. 



Hydrocotyle novae-Zelandiae {TheNeiv Zealand Hydrocotyle) 



Leaves obscurely 5-7-lobed ; umbels 5-12-flovvered. Carpels with one rib. 

 Both islands. Fl. Nov. -March. 



Hydrocotyle asiatica {The Asiatic Hydrocotyle). 



Leaves kidney or heart-shaped, almost entire. Umbels 2-4-flowered, rarely 

 1-flowered. Carpels with 3 ribs. Both islands. Fl. Oct. -March. 



Genus Azorella. 



Tufted herbs, with simple or divided leaves. Umbels simple or irregularly 

 compound. Fruit sub-quadrate, 5-ribbed. A genus of about forty species, of 

 which nine are endemic in New Zealand. 



This is an Antarctic genus of cushion plants. Azorella 

 selago has a typical sub- Antarctic distribution Accena (cf. 

 p. 203), being found in Macquarie Island, Tierra del Fuego, Port 



