.314 PLANTS OF NEW ZEALAND 



Key to Genera. 



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

 Umbels usually compound. Oil-cavities present. 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. 314. 

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



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

 Umbels compound, secondary 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 broad 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, p. 315. 

 Bibs 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 Hydrocotyle. 



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 (The New Zealand Hydrocotyle) 



Leaves obscurely 5-7-lobed ; umbels 5-12-flowered. 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 (cf. Ac&na 

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



