778 The American Naturalist. [September, 
flourishes throughout the summer and wellintoautumn. The 
aberrant Drosera is summer-flowering. Rhamnaces, and, 
particularly, the diclinous Lauracez, and the Hamamelidacee, 
belong to spring,—though Hamamelis, oddly enough, blooms 
in October. 
As the typical Hypogyne are characteristic of spring, so the 
several more important orders of Epigyne belong peculiarly 
to summer and early fall:—the great order Onagraces, and 
the Lythracez ; in late summer the strangely organized Passi- 
flora; in hottest July our Cactaceæ, pushed up from the south- 
west; and in fullest sovereignty in July and August, though 
stretching from May to October, the widespread Umbelliferze ; 
the peculiar tropical Cueurbitacez from J uly to October; the 
more generalized Araliaceæ mainly in spring; and the shrabe 
and trees of the Cornacez also early. The anomalous Asarum 
and Aristolochia are scattered from May to July. 
The | Sympetale part naturally into the Hypogyne, isocarpal 
and anisocarpal; and the Epigyne. In Hypogyne typical 
Isocarpe, the more generalized group, are Ericaces, coming 
from earliest spring late into May and early June, and, at the 
same time, the Diapensiaceze and Primulacew, the last rather 
later. Pyrolez, in which there is a reversion to charipetalism, 
extend into July. Polemoniacez, somewhat transitional to the 
Anisocarps, bloom through May, June and J uly. In Aniso- | 
carpe note :—the tree-order Oleacez, early flowering; the par- 
asitic Orobanchaceze, scattered from April to October; Catalpa ` 
and Bignonia in spring, and the brilliant Tecoma radicans in 
July; the Borraginaces, few in spring, reach perfection in 
summer; Convolvulacese and the unique Solanaceæ, from 
mid-summer into autumn ; the aquatic Utriculariacee, entirely 
in summer; the great specialized orders Scrophulariaces and 
Labiate, throughout the seasons but in greatest predominance 
from mid-summer late into autumn ; also then the Verbenaces. 
Apocynacee and the highly specialized-aberrant Asclepiadacese 
come in mid-summer. Characteristic of autumn are the 
Gentianace:, whose relation to the two last named orders gives 
them a high rank. A few species occur much earlier than the 
| typical genus Gentiana. 
