ESCHSCHOLZIA. 213 
dissimilarity between the youngest buds and those more near 
full growth except as to size. But the availibility of the calyx 
for diagnostic and taxonomic purposes lies in the fact that, at its 
full development itis always the same, whether in the young and 
subacaulescent or in the later and freely branching stages of the 
plant’s career. I therefore always describe it only as it appears 
Within a day’s time of the expansion of the flower. 
The size, form, and even the texture of the pods are matters 
of equal constancy within specific limits. ‘That formed on the 
early scapiform peduncle is found to be neither larger, nor 
otherwise different from those of months later on the most 
diffuse branches, this holding, even where the corolla differs as 
to size and color in young plants and old. 
That the species are so numerous, one might well regret ; 
especially the monographer; for half the number would have 
involved perhaps but half the time and toil in their diagnosis 
and arrangement. But nature has yielded them; doubtless 
even more of them than are here enumerated. And that there 
should be 112 Eschscholtzias ought to surprise no one who is 
acquainted with the strong development of other phanerogamic 
genera upon exactly the same territory which this genus 
occupies. 
On the Pacific side of our continent Ceanothus, a genus of 
rather large shrubs, is almost exactly coextensive in its general 
range with these poppy-like herbs, where it exhibits about 60 
Species. But this important fact is to be noted, that whereas 
Ceanothus is confined to the hillsides and mountain slopes, 
Eschscholtzia grows both there, and also most copiously upon 
the different levels of all the valleys and upon the lowest and 
broadest expanses of the plains, where never a ceanothus appears 
at all. From the point of view of this one circumstance it 
would be perfectly reasonable to expect the papaveraceous herb- 
genus to present twice 60 species; and if to this are added the 
consideration of how vastly the herbaceous genus exceeds 
the shrubby one in the number of individuals, and otherwise 
multiplies its own chances of the evolution of new types, none 
