90 NATURAL HISTORY OF PLANTS. 
It is also of sixty’ American and African Mallows that the genus 
Malvastrum? has been made. In some types of a section Phyllan- 
thophora, there is no epicalyx, and the carpels 
open, or are provided with two dorsal prickles ; 
but in the other species of J/alvastrum these cha- 
= racters disappear, and to distinguish them from 
the Mallows to which they* have been joined as a 
section, there only remains the form of the 
branches of the style, truncate or capitate at the 
apex. It is impossible for us to consider the 
characters above as sufficient to distinguish a 
genus, and therefore we admit four sections in 
the genus J/a/va,’ such as we have just defined it. 
Beside the Mallows are ranged three genera 
in a subseries of umalvee, which differ but 
little from them. ‘These are, first,-the Marsh 
Mallows (Guimauves) (fig. 141), having the same 
flowers and all the same characters of vege- 
tation, but whose involucre is formed of from 
six to nine leaves, united below into a gamo- 
phyllous envelope ; then #Sidalcea and Napea, 
which have no involucre, the former remarkable 
by its androceum, with double column, the 
Fre. 14. outer one being pentadelphous, while the inner 
Floriferous branch. — stamens form a distinct bundle composed of an 
indefinite number of pieces; the latter is 
characterized by its dicecious flowers. 
Sida, having the general characters of the Mallows, forms the 
head of a distinct subseries, Sideæ, because the ovule is descending, 
with the micropyle looking inwards, instead of being ascending, 
Plagianthus divaricatus. 


1 JACQ., Hort, Vindob., t. 156; Ic. Rar, t. 3 A. Gray, Amer. Expl. Exp. Bot., i. 151. 
139.—DC., Prodr., i. 430.—Hoox., Ic., t. 385 —Malvastrum Wevp., Chlor. Andin., ii, 277, 
(Sida); in Bot. Mag., t. 3698.—Harv, et SOND.,  t. 80 (nec A. GRay). 
Fl. Cap., i. 159.—C. Gay, Fl. Chil., i. 295, t. 7. 4 Wepp. loc. cit, 
—Watp., Rep., i. 292; ii. 788; v. 88; Ann. i. 1. Eumalva. 
99; ii, 151. 5 Matva J 2. Callirhoe (Nurt). 
2 DC., Prodr., i. 480.—A. Gray, Pl. Fendler., sect. 4. 3. Malvastrum (DC.). 
21 (1848); Gen. Til., t. 121, 122.—B. H., Gen. 4. Phyllanthophora (A.GRAY). 
202, 982, n. 10 (incl. Malvella JAUB. et SPACH, 
Til. Pl. Or., v. (1853), 47, t. 444.—See p. 140, 
note 4), 
