FLORA OF THE GALAPAGOS ISLANDS, 251 
about 50 km. away. Tower rises only 65 m. above sea level. It 
has been visited by Dr. Baur, 2 September, 1891, and by Messrs. Snod- 
grass and Heller, June, 1899, who have together secured only 19 dif- 
ferent kinds of plants upon it. Of these, 5 are Huphorbiaceae, and 3, 
Oonvolvulaceae. There are no ferns, and what is more remarkable, no 
Amarantaceae, Leguminosae, Rubiaceae, or Compositae, all of which 
are families exceptionally well represented upon most of the other 
islands. The only plant peculiar to the island is Huphorbia viminea, 
forma castellana, merely a well marked leaf-form of this polymorphous 
species. It is worthy of note, however, that in the size, shape, and 
thickness of its leaves, this form on Tower represents the opposite 
extreme from the variety of the same species found on the adjacent 
island of Abingdon. Eleven of the 19 plants observed on Tower are 
confined to the Galapagos Islands. 
WENMAN ISLAND. 
Wenman is a rocky islet, which, like Culpepper (43 km. distant), lies 
considerably to the northward of the other islands. For botanical pur- 
poses it has been visited only by Messrs. Snodgrass and Heller, who 
remained there from the 12th to the 18th of December, 1898. Mr. 
Heller’s field notes, so far as they relate to plants, are as follows: 
“The main part of the island is largely inaccessible, but, like Culpepper, 
covered with a fair growth of vegetation. ‘Through a glass the larger 
plants appeared to be Croton, Opuntia, and on the north side a cluster 
of leafless trees, each about a foot in diameter and twenty to thirty feet 
high, with a smooth brownish bark. In an inaccessible cave a Polypo- 
dium was seen. Our collecting was confined chiefly to a low detached 
islet north of the main island. Its vegetation consisted of a low Opuntia 
[Heller], which grew in thick beds near the edges of the cliffs. Many 
of these were covered with greenish-yellow flowers and others with dry 
and prickly fruit. The central part of the islet was covered by a heavy 
growth of Croton [ Scouleri, var. brevifolius] bushes. These were largely 
leafless, although a few were in flower. In habit they resembled sap- 
lings, with straight trunks ten feet high and an inch or two thick. An 
Lpomoea [Kinbergi] was common, twining among the Croton bushes. 
This had large white flowers. A Telanthera [ Helleri, var. obtusior] 
was also common about the cliffs and near the Opuntia thickets. Dried 
stalks of a Cyperus were noted. On a talus slope of the main island the 
following species were collected: Scalesia [Snodgrassii], bushes two or 
