FLORA OF THE GALAPAGOS ISLANDS. 943 
FAMILIES CONTAINING VASCULAR PLANTS PECULIAR TO THE ISLANDS. 
i, a6 2, #3 3 
Family. EE 53 e% 3 Family. § g be Bi A 3 
62 42 a& & ae af ae 6 
es 3 0 O_ 8 | Sapindaceae ee Sai | Rae: NE | 
Gramineae iS; 1:5 i ace eg tee eee, Pike. 
Cyperaceae 4 1 0 6 | Sterculiaceae | Sle Be ee. 
Bromeliaceae . 1 +O OO 1 | Passifloraceae Oe re: 
Orchidaceae . 1 0 O 1 | Cactaceae iy hake | Sar | a | 
Piperaceae 6 © 0 3 61 Mytases a 8 8 
Urticaceae - 1 0  O - 1+ Melastomaceae . eee ey Dra 
Loranthaceae . . 4 O 0 4 | Umbelliferae . oe see 
Polygonaceae Pik a 1 | Apocynace ae Sales tig sean 
Amarantaceae .29 1 2 82 | Asclepiadaceae Ot ee BE 
Nyctaginaceae - 1 O O-— 1 | Convolvulaceae S..09 0. O28 
Aiz - 4 1 0 6 | Boraginaceae 3 2 8B 
Le ; ne 0 OO 6 | Verbenaceae FE, SE! So ee 
Oxalidaceae . . . 1 0 0 1 | Labiatae 2 0 0 > 
Zygophyllaceae - «2  ¥-° 8° Ss) Solansceas ee eee 
Simarubaceae . 1 8 64 YF Aearieae i oy cee 
Buteetacese .. 1: 0. Oo 1d Ree I eS 
Polygalaceae a 1 0 8 | Cucurbitaceae EO BORN Sete 
Euphorbiaceae . .25 7 ‘7 839 | Compositae . wi 9 = 
Celastraceae . he oe 1 
ABINGDON ISLAND. 
Abingdon is, with the exception of the rather remote islets of Wenman 
and Culpepper, the most northern of the archipelago. It is about 14 km. 
long, and attains a height of 600 m. It was visited by Dr. Baur for a 
few hours, September 8th, 1891, and by Messrs. Snodgrass and Heller in 
June, 1899. Fifty flowering plants and ferns are known to occur on 
the island, and of these four are peculiar to it, namely : Euphorbia 
viminea, var. abingdonensis, Borreria ovalis, forma abingdonensis, Justicia 
galapagana (with close Mexican congener), and Scalesia Hopkinsii. The 
Peculiar element is thus 8 per cent of the flora. Peperomia galioides of . 
Mexico and tropical South America occurs upon Abingdon, but upon no 
other of the Galapagos Islands. The remaining plants are common to 
other islands of the group, and represent in all 22 families, of which 
the Filices, Gramineae, Rubiaceae, Euphorbiaceae, and Compositae have 
the greatest number of species. Although Abingdon lies, as we have 
seen, to the northward of the main archipelago and on the side toward 
‘Yenman and Culpepper, it has, so far as we yet know, only one plant 
in common with the former and none with the latter. A little over half 
