218 PHANEROGAMOUS PLANTS. 



extending to California. For Nuttall's P. Californica is the very 

 same. — Plant about a foot high, somewhat succulent. Flowers an 

 inch and a half in diameter. Petals roundish, somewhat leathery. 

 This is interesting as being the only Pceonia of the New World. 



Grossosoma, Nutt., a most remarkable Californian genus, which, in 

 the Botany of Whipple's Expedition (where a good figure is given), 

 was considered to be most allied to Pceonia, may rather more con- 

 fidently be referred to that tribe now that ripe seeds are known, and 

 the embryo, is found to be fully half the length of a fleshy albumen. 

 Although the arillus would technically refer the plant to the Dilleni- 

 acece, where it would be without any known relative whatever, this is 

 counterbalanced by the fleshy perigynous disk which has its counter- 

 part only in Pceonia. 



Oed.2. berberidacea 



1. BERBERIS, Linn. 



1. Berberis Aquifolium, Pursh. 



Hab. From Puget Sound to the Valley of the Sacramento, and, if 

 we include B. pinnata, Lagasca (Mahonia fascicular is, DC), into which 

 it gradually passes, along the whole coast of California. 



2. Berberis nervosa, Pursh. 



Hab. Deep woods around Puget Sound, and in similar stations 

 down to California. — Rarely more than one or two feet high. 



