94 Writings of Edward L. Greene. [ZOE 
smaller seeds of H. imosa, but those of the terrestrial form of 
aquatilis are hardly known. A form of Zimosa was collected in 
May, 1892, in a trench by the side of the railway about a mile 
north of Suisun. The plants formed a matted mass several feet 
in length, and were fruiting abundantly from extremely minute 
cleistogamous flowers—no others were to be found. Mr. 
Greene’s station was not far distant. Both the locality and the 
rarity of this plant show it to be in all probability a recent 
introduction. 
Arctostaphylos insularis,* patula & media Greene are like 
nearly all the recent species proposed, mere variations of the 
older ones of which several are maintained with difficulty. 
Rhododendron Sonomense Greene is R. occidentalis Gray. 
Pholisma depressum Greene tf is P. arenarium Nutt. 
Dodecatheon Clevelandi, Cusickiz, cruciatum, patulum and 
pauciflorum, are forms of D. Meadia I,. If the circumscissile 
dehiscence of the capsule prevailing in most of the western forms 
of Dodecatheon be made a specific distinction, it was already 
named before Mr. Greene began, but it has been shown that this 
form of dehiscence grades into the ordinary one. 
Gentiana superba: Greene is credited at Harvard to G. lanceo- _ 
lata Griseb. 
Collomia diverstfolia Greene is a stout form of C. hetero- 
phylla. The type was collected by the writer. 
Gilia parvula Greene is G. viscidula Gray. 
Navarretia microcarpa Greene is Gila filicaulis Torr. 
Navarretia prolifera Greene is a large-flowered form of Gzléa 
divaricata, 
Navarretia nigelleformis Greene is a yellow-flowered form of 
Gilia cotulefolia. It is common about Antioch and in Lake 
County, and has been collected at San Luis Obispo by Miss 
M. M. Miles. 
Navarretia subuligera, leptantha foliacea, & hamata Greene 
are forms of Gi/ia atractylo‘des, some of them connecting rather 
closely with G. v¢sczdula. 
* Bull. Cal. Acad. ii, 494. 
t Bull. Cal. Acad. i, 198. 
} Zoe i, r9. 
