PLe^ppr. 29. VINC^. lOJ.Vinca. 34S 



Woods and coppices ; perennial ; May. 

 Siem upright ; leaves rough ; jiowers blue ; follicles 

 shining. 



Fam. XIII. 30. CONVOLVULACE^. De Candolle. 



Convolvuli, Jussieu. 

 Calyx 5-lobed, persisting; corolla 1 -petal, hypogynous, 

 deciduous, limb 5-lobed ; lobes regular ; stamens 5, in- 

 serted at the base of the corolla and alternate with the 

 lobes; ovary simple, 2 or 4-celled, rarely 1 -celled or 2 

 or 4-parted, few-seeded, girt at the base with an an- 

 nular gland; ovules definite; style i, simple or divided; 

 stigma obtuse or acute ; capsule 2 .or 4-celled, mostly 

 valvular, rarely valveless or opening transversely; edge of 

 the valves opposite to the dissepiments : seeds bony, affixed 

 at the base of the inner angles of the dissepiments; pe- 

 risperni mucilaginous; corculum curved; cotyledons cor- 

 rugated ; radicle below. — Stem herbaceous, rarely shrubby, 

 mostly twining, milky, bald or simply pubescent; leaves 

 alternate, mostly undivided, rarely 0; stipules 0; inflo- 

 rescence axillary or terminal : peduncles 1 or many-flowered ; 

 IractecB usually 2 to each flower. 



Corolla bellshap'e ; calyx 5-parted ; 

 bractecB 2, leaflike, embracing the calyx. Calystegia. 102. 



Cor-olla bellshape ; calyx 5-parted ; 

 IractecE 0, or very small, distant .... Convolvulus. 103. 



Corolla bellshape, tube naked ; 

 plant leafless, parasitic Cassytha. 105. 



Corolla funnelshape, tube 4 or 5-scaled ; 

 plant leafless, parasitic Cuscuta. 104. 



A. Convolvuli. Ovary 1 ; capsule mostly valvate ; cotyle- 

 dons wrinkled ; plant leafy. 



I. 102. CALYSTEGIA. R. Brown. Bindweed. 



Calyx 5-parted, inclosed in a 2-leaved bractea; corolla 

 bellshape, 5-plaited, 5- angled ; stamens 5, nearly equal, 

 shorter than the limb ; ovarij half 2-celled, 4-seeded ; style 

 undivided ; stigmata 2, blunt, round or globular ; capsule 

 1 -celled. — Herb milky, bald, twiBing or prostrate; peduncles 

 solitary, 1 -flowered. 



