DERIVATION OF THE FLORA AND FAUNA 21 7 



Peperomia fernandeziana, Parietaria humifusa, Paronychia chilensis, Cardamine 

 flaccida, Callitriche Lechleri, Centella triflora, Dichondra repens, Calystegia tugu- 

 riorum, Mimulus glabratus, Plantago truncata, Hedyotis thesiifolia, Lobelia alata. 



c. Also known from San Ambrosio: Spergularia confertiflora. 



d. S. American, but not reported from Chile: Cardamine chenopodiifolia. 



II. Subantarctic-Magellanian element. — 15 (10.2 %). 



a. Endemic (4): Agrostis masafuerana, Drimys confertifolia, Acaena masafue- 

 rana, Abrotanella crassipes. 



b. Not endemic, in several cases extending north along the Andes (11): Oreo- 

 bolus obtusangulus, Uncinia brevicauli? and tenuis, Carex Banksii, Rubus geoides, 

 Acaena ovalifolia, Myrteola nummularia, Empetrum rubrum, Nertera granadensis, 

 Lagenophora Harioti, Gnaphalium spiciforme. 



III. Neotropical element. — 19 (12.9 %). 



a. Belonging to endemic genera without or with only distant relations to the 

 present Andean flora but presumably of neotropical ancestry (5): Megalachne 

 berteroniana and masafuerana, Podophorus bromoides (only tentatively referred here), 

 Centaurodendron dracaenoides, Yunquea Tenzii. 



b. Belonging to endemic genera of undoubted neotropical affinity (2): Juania 

 australis, Selkirkia Berteroi. 



c. Endemic species belonging to widespread genera and presumably of neo- 

 tropical ancestry (7): Urtica fernandeziana, Chenopodium Sanctae Clarae, crusoe- 

 anum and nesodendron, Eryngium bupleuroides, inaccessum and sarcophyllum. 



d. Endemic species of unquestionably neotropical parentage (5): Urtica Masa- 

 fuerae, Berberis corymbosa and masafuerana, Ugni Selkirkii, Nicotiana cordifolia. 



IV. Pacific element. — 26 (17.7 %). 



Affinities along the route New Zealand-Australia— Melanesia-Polynesia-Hawaii; 

 all endemic, 



a. The genus endemic (9): Cuminia fernandezia and eriantha, Robinsonia 

 gayana, thurifera, evenia, Masafuerae and gracilis, Symphyochaeta macrocephala, 

 Rhetinodendron Berterii. 



b. Only the species endemic (17): Cladium scirpoideum, Carex berteroniana, 

 Peperomia margaritifera and Skottsbergii, Boehmeria excelsa, Santalum fernande- 

 zianum, Ranunculus caprarum, Fagara mayu and externa, Gunnera bracteata, 

 Halorrhagis asperrima, masatierrana and masafuerana, Euphrasia formosissima, 

 Plantago fernandezia, Coprosma Hookeri and pyrifolia. 



V. Atlantic - S. African element. — 6 (4.1 %). Endemic. 



Peperomia berteroana, Wahlenbergia Larrainii, fernandeziana, Grahamae, Masa- 

 fuerae and Berteroi. 



VI. Eu-Fernandezian element. — i 2 (8.2 %). 



Isolated endemics of unknown parentage, the Cicoriaceous genera forming a 

 natural group. 



