386 



CONVOLVULACEJE. 



Stamens attached near the hase of the corolla. Ovary superior, 

 commonly 2-celled, with 2 ovules in each cell. Styles 1 or 2. 

 Fruit most frequently a capsule. Embryo with folded cotyledons. 



Ovary 2-parted ; styles 2, distinct or united at base only; creeping herbs . . 



1. DlCHONDRA. 



Ovary entire. 



Style 1, entire or cleft at the apex only; prostrate or twining herbs, one 



species woody.at base 2. Convolvulus. 



Styles 2, distinct. 



Erect non-twining leafy herb 3. Cressa. 



Parasitic leafless twining herbs 4. Cuscuta. 



1. DlCHONDRA Forst. 



Creeping perennial herbs with filiform stems. Leaves reniform or 

 round-cordate, entire. Peduncles short, naked, 1-flowered. Corolla 

 deeply 5-cleft or -parted, the lobes imbricated in the bud. Stamens 

 short. Ovary 2-parted, forming 2- indehiscent or in-egularly burst- 

 ing utricles in fruit. Styles 2, distinct or united at base. Seed 

 solitary. Cotyledons linear, entire. (Greek di, double, and chondra, 

 grain, on account of the deeply parted or twin fruit.) 



1. D. repens Forst. Stems slender, partly subterranean, rooting 

 freely; leaves glabrous or soft-pubescent, | to 1 in. wide, on long 

 petioles; corolla yellow, 1 to 1£ lines long, rather shorter than the 

 obovate to spatulate sepals. 



Introduced: Mt. Tamalpais; Mountain Lake, San Francisco; near 

 Ocean View; Monterey. 



2. CONVOLVULUS L. Bindweed. Morning-glory. 

 Twining or prostrate herbs. Sepals 5. Corolla funnel form to 

 campanulate. Style entire, or cleft at the apex only. Stigmas 2, 

 ovate to linear. Stamens included. Capsule globose with 4 seeds 

 in 2 cells (or hy abortion 1-celled), mostly 2 to 4-valved. (Latin 

 convolvo, to entwine.) 



Flowers showy, 1 to 2 in. long; perennials. 

 Calyx enclosed by a pair of broad bracts; peduncles 1-flowered; perennial 

 herbs. 



Corolla pink, purple, or lavender. 



Leaves reniform, glabrous; slightlv succulent seaside herb 



1. C. Soldanella. 



Leaves ovate-lanceolate, sagittate at base, acuminate at apex, 2 in. 

 long, sparsely hirsute; bracts cordate at base.2. C. scpium. 

 Corolla white or creamish; leaves ovoid or deltoid, sagittate, mostly 1 

 in. long; trailing or often nearly acaulescent. 



Herbage white with a velvety tomentum 3. C. villosus. 



Herbage green 4. C. subacaulis. 



Calyx not enclosed by bracts; peduncles often more than 1-flowered; 

 leaves sagittate. 



Stems climbing over shrubs and trees, woody below; bracts subulate- 

 lanceolate, situated about their own length from the calyx 



5. V. Inteolus. 



Stems herbaceous, prostrate; peduncles with a pair of bracts near the 



middle 6. C. arvensis. 



Flowers small, 3 lines long; leaves not sagittate; annual. 7. C. pentapttaloides. 



1. C. Soldanella L. Shore Morning-glory. Stems prostrate, 



