VOLs i. | _ Naturalized Plants. 263 
inches long.* It has also been collected by Mrs. Brandegee on the 
Mojave Desert. 
This plant is an annual, with diffuse stems and thick spatulate 
leaves, both of which, as well as the calyces, glister with crystalline 
papillae. The flowers are showy and of ared color. The European 
habitat of the species is Greece and the Canary Islands. 
_ The remaining species, JZ nodtflorum Linn., is the least known 
and apparently most restricted of the three. It has been collected 
on the two adjacent islands of Santa Catalinat and San Clemente,$ 
and on the continent at San Diego, on sandy ridges along the 
shores of both bay and ocean.|| Mr. Cleveland collected it as long 
ago as 1876, and reports that it was as abundant then as now. It 
seems, however, not to have been known by the authors of the 
Botany of the Geological Survey, and is not mentioned in that or 
any other American flora with which I am acquainted. In the old 
world it is known from Egypt, Morocco, Corsica and Naples.** It 
is an annual, like the last species, and has a similar crystalline herb- 
age, but is very much smaller, the stems seldom exceeding an inch 
or two in length. The leaves are narrowly spatulate, and the flow- 
ers small and greenish-white. 
So far as writers have referred to the origin of these American 
ice-plants, they have dismissed them as “ probably introduced,” 
until recently Prof. Greene}thas asserted the claims of 47. crystalli- 
num to be considered an indigenous.plant. These claims if admit- 
ted are equally conclusive as to the two remaining species. 
In considering this question the geographical distribution of the 
species is very significant. At San Francisco, its northern limit, 
the genus is represented by a sinple species, littoral there, but be- 
coming also insular at the Channel Islands, and extending at least 
_as far south as San Diego. At Santa Barbara the second species is 
_ *D, Cleveland, who states that while this plant is abundantly nectariferous, 
the honey made from it has a disagreeable taste, so that it is regarded as a pest by — 
_apiarists. 5 ‘ 
~ tDC. Prod., iii, 448. : 
_-[Brandegee, Zoe i, 113. §Lyon, I. c. 
—{/D. Cleveland in lit. 
**DC. 1c. 447. 
— ttPitt,, i, 82. 
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