270 C. SKOTTSBKRG 



b. luidcmic species of non-endemic genera, some of wider distribution (14): 

 Chaetotropis imberbis. Chusquea fernandeziana, Hesperogreigia Berteroi, Urtica 

 Masafiierae, Dysopsis hirsuta. Colletia spartioidcs, Azara fernandeziana, Ugni Sel- 

 kirkii, Myrceugenia Schulzei, Rhaphithamnus venustus, Solanum fernandezianum, 

 robinsonianum and masafiieranum, Xicotiana cordifolia. 



c. Sj)ecies also found on the continent (13): Stipa neesiana and laevissima, 

 Piptochaetium bicolor, Chaetotropis chilensis. Cyperus eragrostis and reflexus, Eleo- 

 charis fuscopurj)urea, Peperomia fernandeziana, Parietaria humifusa, Myrteola num- 

 mularia, Minnilus ghibratus, Phuitago truncata, Hedyotis thesiifolia. 



2. luidemic genera or endemic sections of wide-ranging genera without relatives 

 in the present continental flora but supposed to descend from extinct neotropical 

 ancestors. — 23 sp. 



a. Ik'longing to endemic genera (16): Podophorus bromoides, Megalachne ber- 

 teroniana and masafuerana, Centaurodendron dracaenoides, Yunquea Tenzii, Den- 

 droseris macrophylla, macrantha, marginata and litoralis, Rea neriifolia, micrantha 

 and j)ruinata, IMioenicoseris j^nnata, berteriana and regia, Hesperoseris gigantea. 



h. Ik'longing to endemic sections (7): Urtica fernandeziana, Chenopodium 

 Sanctae Clarae, crusoeanum and nesodendron, Eryngium bupleuroides, inaccessum 

 and sarc()j)h\'llum. 



III. Arcto-tertiary element. — 23 sp. (15.6%). 



Cicncra essentially boreal but extending south along the Andes or reappearing in S. 



America. 



a. luidemic species of wide-ranging genera (13): Agrostis masafuerana, Sper- 

 gularia confertiflora (also Desventuradas) and masafuerana, Berberis corymbosa 

 and masafuerana, Cardamine Kruesselii, Galium masafueranum, Erigeron fruticosus, 

 luteoviridis, Ingae, Innocentium, turricola and rupicola. 



b. Species also fountl on the continent (lo): Trisetum chromostachyum, Carex 

 Banksii, Paronychia chilensis, Cardamine chenopodiifolia and flaccida, Rubus geo- 

 ides, Callitriche Lechleri, P^mpetrum rubrum, Calystegia tuguriorum(.?), Gnaphalium 

 s{)ici forme. 



IV. Palaeotropic element. — 2 sp. (1.4%). 



Plndemic genus: Cuminia fernandezia and eriantha. 



V. Austral element of wide-ranging seaside species. — 6 sj). (4,1 %). 



Scirpus nodosus and ccrnuus, Salicornia fruticosa (peruviana), Tetragonia ex- 

 [)ansa. Dichondra repens. Lobelia alata. 



I'Acn if Antarctica is recognized as an important source of evolution of both 

 plants and animals and as a centre from where large-scale migration took place, 

 a percentage of 42 may seem surprisingly high, and I admit that some genera 

 or species have been referred to group I with considerable hesitation. This does 

 not, with very few cxceptif)ns, aj)i)ly to I. i, 22.4% of the total or 53.2% of I. 

 Luzula and Jiiucus were [)laced here because the family was regarded as Antarctic, 

 but even if this be true it is po.ssible that the sections including our species are 



