From Asa Gray   30 March 1877

Herbarium of Harvard University, | Botanic Garden, Cambridge, Mass.

March 30 1877

My Dear Darwin

The Lithospermums of S Batschia are dimorphic—as is well known. But one of them, L. longiflorum (Pentalophus A. Dl.) turns out to bear, later in season (and in some plants from the first?) smaller and smaller flowers,—of which some must be cleistogenous.2 Now of this a long series of the long-flowered state in the herbm. shows only one form of stamens & style, i.e. is not dimorphic, that I can see.

It is the only one that is cleistogenous. Curious, that it should take to this instead of dimorphism

Yours ever | A. Gray

Summary

Lithospermum longiflorum has cleistogamous flowers and, unlike other species of genus, it is not dimorphic.

Letter details

Letter no.
DCP-LETT-10918
From
Asa Gray
To
Charles Robert Darwin
Sent from
Herbarium of Harvard
Source of text
DAR 165: 195
Physical description
2pp