MALVACE A. 105 
the very nearly related genus Ochroma,; while in the genera Cava- 
nillesia, Hampea, and Scleronema,the anthers bearing filaments are free, 
pentadelphous or polyadelphous. All these plants are American. 
In Asia and tropical Oceania the series is on the contrary 
represented by a subseries with exceptional characters having for : 
type the genus Durio (fig. 173). The plants which constitute it have 
simple, entire leaves ; but they are penninerved, thick and covered 
like the inflorescence and most of the organs with scaly hairs, some- 
times very abundant. The flowers are enveloped by a gamophyl- 
lous involucre representing a valvate calyx irregularly torn at an- 
thesis. In Durio it is also detached from the pedicel at its base. 
The calyx is a valvate sac. Within are seen five petals and very 
numerous stamens, monadelphous at the base, then divided into five 
bundles. The anthers are adnate to the connective and anfractuous. 
The fruit is woody, muricate, indehiscent, having seeds surrounded 
by a fleshy pulp and an embryo with thick cotyledons often confer- 
ruminate. Cu/lenia, related to Durio, has a long cylindical calyx 
and is destitute of corolla.  Veesia has nearly the same perianth as 
Durio ; but the stamens are free or 
united at the base into four or 
five bundles; and the apex of each , 
filament is surmounted by one or | 
two globose anthers, dehiscing by 
a sort of central pore and inserted 
upon a slightdilatation of this apex. 
Boschia (figs. 174, 175) has similar 
anthers isolated or approaching 
each other by twos, threes, or even 
more at the apex of each filament. 
A variable number of exterior sta- 
Boschia excelsa, 

; Fie, 174. Fie. 175. 
mens are represented by petaloid Flower (3). gene (©) 
tongues similar to the real pieces of 
the corolla which are exterior to them. Finally, Cæw/ostegia is a plant 
altogether abnormal inasmuch as its small flowers, really constructed 
like those of Meesia or Boschia, have a concave receptacle in the form 
of a reversed cone. The ovary is implanted at the bottom of the 
cavity, but the perianth and androceum inserted upon its edges 
become very distinctly perigynous. 
