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CONVOLVULACE 67 
sitic plants, in the former case containing a milky latex; 
chiefly tropical, with no alpine species. 
I. CONVOLVULUS, L. 
Flowers large, axillary, fugacious; corolla twisted in 
bud ; ovary 2-celled, with two seeds in each cell. Prostrate 
or twining herbs, with undivided leaves and a milky 
latex. 
C. sepium, L. (Calystegza sepium, Br.), Larger Bind- 
weed, with very large white flowers ; and C. arvensis, L., 
Smaller Bindweed, with smaller white or pink flowers; 
both very common, the former in hedges, the latter by 
road-sides. 
2; CUSCUTA,  E. 
Leafless parasites, entirely destitute of leaves, with 
very slender red stem, provided with “haustoria” or 
sucking-organs, by which they are attached to the host- 
plant, and dense clusters of small wax-like flowers. The 
species of Dodder are difficult to distinguish, and are best 
recognised by the plants on which they are parasitic, and 
to which they are frequently very destructive. | 
C. europea, L., the species with largest flowers ; occa- 
sional on stinging-nettle, hop, and other plants, especially 
by water-sides. C. epithymum, L., much the commonest 
species; on gorse (in this country), thyme, and other 
plants. C. Trifoliz, Bab., Clover Dodder; on clover and 
lucerne; very destructive. C. Epzlinum, Weihe, Flax 
Dodder; on flax; very destructive. C. suaveolens, Ser. 
(corymbosa, R. and P., racemosa, Mart.), with flowers in 
corymbose panicles; on lucerne. 
