658 ARBORETUM ET FRUTICETUM BRITANNICUM. 
Varieties. 
Calycine segments linear-lanceolate, bluntish. 
Segments of corolla broadish at top, Flow- 
ering stems usually erect. Flowers void of 
scent. Corolla blue, with white throat, 
varying to purple and white; of a smaller 
size than that of V. major. (Don’s Mill.) 
A trailing evergreen undershrub. Europe ; 
in many places in Britain, in hedges and 
woods, in rather damp situations. Flowers 
blue; March till September. 
& V. m. 2 foliis argénteis Lodd. Cat.— 
Leaves variegated with white. 
s V. m. 3 foliis atireis Lodd. Cat.—Leaves 
veriegated with yellow. 
2, V.m. 4flore albo Lodd. Cat. —Flowers 
white. 
2, V.m. 5 flore pléno Lodd, Cat —Flowers 
double. 
2 V. m. 6 jfidre puniceo Lodd. Cat.— 
Flowers red. 
t V.m. 7 acutifiora Bert.—Leaves ovate 
acute at both ends; margins glabrous. i330; PSaS 
Segments of corolla oblique; ovate- 
acuminate. South of Europe. Flowers blue; March and April. 
Orver LI. ASCLEPIADA CE. 
Orv. CuaR. Calyx 5-cleft, persistent. Corolla 5-lobed ; zstivation usually 
imbricate. Stamens 5, epipetalous. Pollen masses equal in number to the 
cells of the anthers, which are 2 or 4, and fixed to fine processes of the 
stigma. Ovarium twin. Styles 2, crowned by one stigma. Fruit of 2 
follicles. Seeds numerous, imbricate, furnished with a tuft of hair at the 
umbilicus. Albumen thin. —The pollen being combined into a definite 
number of waxy masses separates this order from all other dicotyledonous 
orders. (G. Don.) 
Leaves simple, opposite, exstipulate, deciduous; shining, entire. Flowers 
subumbellate. — Twining shrubs ; natives of South Europe and Asia. 
Genus I. 
q | 
3 
PERI/PLOCA L. Tut Pertpioca. Lin. Syst. Pentandria Digynia. 
Identification. R. Br. in Mém. Wern. Soc., 1. p. 57.; Don’s Mill. 4. p. 163. 
Synonymes. Periploca Fr. ; Schlinge, Ger.; Periploca, Ital. 
Derivation. From peripleko, to wrap about ; in allusion te the twining stems. 
Gen. Char., $c. Corolla rotate. Throat furnished with 5 awned scales, which 
alternate with the segments of the corolla. Filaments distinct. Anther 
cohering, bearded on the back. Pollen masses applied to the dilated tops 
of the corpuscles of the stigma, solitary, or composed of 4 confluent ones. 
Stigma almost mutic. Follicles cylindrical, much divaricate, smooth. Seeds 
comose. (Don’s Afill.) 
Leaves as in the Order. Flowcexs subcorymbose, interpetiolar. — Shrubs, 
