MORNING-GLORY FAMILY. 325 



2 (rarely 1) -celled, with 2 ovules in each cell. Styles 1 or 2. Fruit most fre- 

 quent ly a capsule, 1 to 4 (or (>) -seeded. Embryo with folded cotyledons. 



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



imbricate in the bud 1. Dichondra. 



Ovary entire. 



Style 1, entire or cleft at the apex only; corolla plicate and twisted in the bud; pros- 

 trate or twining herbs, one species woody 2. Convolvulus. 



Style 2. distinct; corolla-lobes imbricate in the bud. 



Erect non-twining leafy herb 3. CRESSA. 



Leafless twining parasites 4. Cusci i \. 



1. DICHONDRA Forst. 



Perennial herbs with slender creeping stems and very small obscure flowers 

 near the surface of the ground. Leaves reniform, entire, with very short 1- 

 flowered peduncles in the axils. Calyx 5-parted. Corolla 5-cleft, the lobes im- 

 bricated in the bud. Stamens short. Ovary 2-lobed, separating when ripe into 

 2 one-seeded utricles which sometimes break open irregularly. Cotyledons 

 linear, entire. (Greek, di, double, and chondra, grain, on account of the 

 deeply parted and twin fruit.) 



1. D. repens Forst. Stems whitish pubescent, rooting freely; leaves green 

 and mostly glabrous, % to 1% in. wide, on long peduncles with 2 small bracts 

 at base; calyx thinnish, 1 to 1% lines long; corolla purple, edged with white, 

 of about the same length; ovary densely white hairy; styles united at base. 



Mt. Tamalpais; San Francisco; Monterey. Introduced from the southward 

 or from the tropics. Also at San Diego. Apr. 



2. CONVOLVULUS L. Bindweed. Morning-glory. 

 Twining or prostrate herbs, ours perennial except one. Corolla funnelform 

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

 linear. Stamens included. Capsule globose with 4 seeds in 2 cells (or by 

 abortion 1-celled), mostly 2 to 4-valved. (Latin convolvo, to entwine.) 



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



Calyx subtended by a pair of bracts; peduncles 1 -flowered. 



Corolla pink, purple, or lavender; calyx enclosed by the broad bracts. 



Leaves reniform, glabrous; slightly 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. septum. 



Corolla white or creamish; calyx embraced by the smallish bracts; 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 with the narrow bracts more or less distant; peduncles often more than 1-flowered; 

 leaves sagittate. 

 Stems climbing over shrubs and trees, woody below; bracts situated about their own 



length from the calyx 5. C. hit coins. 



Stems herbaceous, prostrate; bracts near the middle of the peduncle 6. C. orvensis. 



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



1. C, soldanella L. Shore Morning-glory. Stems prostrate, % to 1% ft. 

 long; herbage glabrous and slightly succulent; leaves thick, reniform, deep 

 green and shining, 1 to 2 in. broad, mostly broader than long, on stout petioles ; 

 corolla short and rather broadly funnelform, 1% to 2 in. broad, pinkish or pale 

 purple; capsule becoming 1-celled. 



Sandy beaches of the seashore: San Francisco and north and south along the 

 coast. Apr.-June. 



2. C. sepium L. Hedge Bindweed. Stems from a slender horizontal root- 

 stock, often several ft. long, climbing on herbaceous plants or trailing; herb- 

 age nearly glabrous; leaves ovate-lanceolate, acuminate at apex, hastate at base, 



