314 PLANTS OF NEW ZEALAND 



Key to Genera. 



1. Umbels siiiiple or irregularly cornijound, fruit witliont 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 cari)els. 3 



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



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

 Leaves radical. Actinotus. 



4. Fruits flat. Hydrocotyle,p.314. 

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



5. Umbels usually compound, i>rimary ridges only present, 6 

 Umbels compound, secondary ridges present, often more stronglj' 

 developed than the primary. 11 



6. Stems creeping. Umbels simple. Crantzia. 

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



irregularly" compressed. 7 



7. Car]3els winged. 8 

 Carpels not winged. 10 



8. Stems erect or climbing. Cariiels with two broad lateral wings. Angelica, p. 3'2'2. 

 Carpels with 3 or 5 wings on each face. 



9. Umbels compound. Ligusticum, p. 315. 

 Umbels in erect s])ikes or |)anicles. Aciphylla, p. 316. 



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

 Ribs 5. Usually a hairy iilant, umbels borne on a scape. Oreomyrrhls. 



11. Fruit bristly. Daucus. 



Daucus, Oreonnjrrlns, Actinotus, and Crantzia are unimportant genera., with 

 inconspicuous fiowers, and will not be further noticed here. 



Genus Hydrocotyle. 



A rather hirge 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. 



HydPOCOtyle novae-Zelandiae (The New Zealand Hydrocotyle) 



Leaves obscurely 6-7-lobcd ; 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, ra.rely 

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



(jremts 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 arc endemic in New Zealand. 



This is an Antarctic genus of cushion plants. Apsorella 

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

 p. '208), being found in Macquarie Island, Tierra del Fuego, Port 



