eae aA 
Polemonium. LI, POLEMONIACEA. 305 
Or 
and America, extending also in the mountain-regions of central Europe, 
and Asia. In Britain it is found apparently indigenous in several parts 
of the north of England, but has been so long cultivated in cottage 
gardens, and seeds so readily, that it cannot be pronounced with cer- 
tainty to be truly indigenous. 7. summer. 
LII, CONVOLVULACEA. CONVOLVULUS FAMILY. 
Herbs usually twining or prostrate (rarely, in some exotic 
species, erect or shrubby), with alternate leaves, or leafless 
and parasitical; the flowers, often very showy, growing singly 
or several together on axillary peduncles. Calyx of 4 or 5 
distinct sepals, often very unequal. Corolla usually cam- 
panulate (but varying in form in exotic species), plaited in the 
bud, with 4 or 5 lobes, or nearly entire. Stamens 4 or 5, 
attached ‘Sa the base of the corolla. Ovary and capsule 
containing 2, 4, or 6 seeds, and often divided into 2, 3, or 4 
cells, the partitions very thin, and remaining attached to the 
central column, and not to the valves, when the capsule bursts. 
Style simple, with 2 or rarely 3 stigmatic lobes, or 2 distinct 
styles. 
An Order rather numerous in species, and widely spread over the 
warmer and temperate parts of the globe. The exotic genus Jpomeaa, 
including Pharbitis and Quamoclit, often separated from it, supplies 
some of our most beautiful greenhouse and hothouse climbers. 
Stem leafy. Corollacampanulate . 1. CONVOLVULUS. 
Stem thread-like, without leaves, parasitical on | other plants. 
Corolla nearly globular ' ; ‘ 20 Cuscura. 
I CONVOLVULUS. CONVOLVULUS, Bindweed. 
Twining or prostrate herbs (or in some exotic species erect), with 
alternate leaves. Sepals 5. Corolla campanulate. Style single, with 
2 oblong or linear stigmatic lobes. Capsule with 4 seeds in 1 or 2 
cells, 
A large genus, having the geographical range of the family, but 
more especially abounding in the Mediterranean region. 
Bracts small, and placed on the peduncle at some distance from 
the flower. Stigma narrow-linear ; - Ll. C. arvensis. 
Bracts large, close under the calyx. Stigma ovate or oblong. 
Stem climbing. Leaves angular at the base . : : ‘ - 2 Cy sepium. 
Stem prostrate. Leaves thick, rounded : : 3 . 3. C. Soldanella. 
The common blue Convolvulus minor of our etd (C. tricolor of 
botanists) is a south European species ; the so-called Convolvulus major 
is the Jpomea or Pharbitis purpurea, a widely-spread species over the 
hotter parts of the world, probably of American origin. 
1.C. arvensis, Linn. (fig. 686). Lesser Bindweed.—Rootstock 
slender, creeping underground to a great extent. Stems twining, 
U 
