GENERA AND SPECIES. 
137 
Sub-Class IV.—Choripetaleae Hypogynae. 
ORDER PRIMULACEAE, 
Calyx free, corolla rotate with a short inflated tube ; 
capsule bursting transversely 
‘Calyx tubular; corolla salver-shaped, with Piles hobaeen 
the lobes ; capsule bursting by valves.. 
Centuneulus. 
Minute; leaves alternate, ovate; flowers axillary, solitary, 
nearly sessile, pale-rose, very small ; stamens 4 
Samolus. 
Flowers white, rather large, in racemes; leaves firm, 
somewhat succulent, lanceolate or obovate ; stamens 
5 with 5 alternating staminodia. Perennial herb, 
erect and stoloniferous 
ORDER CONVOLVULACEAE. 
I. Leafy plants. Sepals distinct. 
Style filiform undivided to the stigmatic lobes; ovary 2- 
celled, usually 2 ovules in each cell; flowers axillary. 
Stigma-lobes 2, globular. Trailing or climbing herbs 
Stigma-lobes 2, SHE GD OPE Trailing or ene 
herbs 
Stigma-lobes 6 to 8; ius 2- called: 1 ae in yee 
Style more or less beeinaliod below the stigmas. Ovary 
2-celled, 2 ovules in each cell. Trailing or twining, 
subshrubby. 
Style-branches 2, stigmas globular 
Style-branches ‘% stigmas linear 
Styles 2. Small prostrate or diffuse perennials. 
Stigmas globular; fruit 1-celled, 1-seeded 
Stigmas globular, ovary of 2 earch each with a 
separate style and ovule 
11. Leafy plants; Oe 5-toothed. 
Style-branches 2, stigmas globular, fruit 1- to 2-seeded. 
Prostrate or diffuse, somewhat shrubby; flowers very 
small, axillary, solitary and sessile 
m1. Leafless parasites with filiform twining stems. 
Styles 2, calyx lobed .. 
Ipomoea. 
Leaves of 3 obovate leaflets; stellately tomentose 
Centuneulus 
Samolus 
minimus 
repens 
Ipomoea 
Convolvulus 
Polymeria 
Breweria 
Evolvulus 
Cressa 
Dichondra 
Wilsonia 
Cuseuta 
Davenporti 
