CONVOLVULACK2E. (MORNING GLORY FAMILY.) 87 



2. C. occidentalis, Gr. Mostly smooth; stems twining several feet high; leaves 

 from broadly ovate-triangular with a deep and narrow basal sinus to narrowly lanceolate- 

 hastate; the posterior lobes often 1-2- toothed; peduncle elongated, not rarely 2-flowered 

 Within the bracts; these ovate or rarely oblong, commonly surpassing the enclosed calyx; 

 corolla white or pinkish, 1 to 1| inches broad; stigmas linear. 



3. C. Californicus, Choi. Minutely and rather densely pubescent, a span or less 

 high, or with trailing stems a foot long; leaves from ovate or obovate and obscurely 

 hastate to triangular-hastate, the basal lobes sometimes 1-2-toothed, long-petioled; pe- 

 duncles shorter than the petiole; bracts oblong or oval, about equaling the sepals, or 

 shorter; corolla white, cream-color or flesh-color, 1 \ to 2 inches long. 



4. C. villosus, Gr. Densely silky- villous or woolly; corolla cream colored, an inch 

 long. 



* * No calyx-like bracts; sometimes a pair of leaves close under the flower or a pair of 

 bracts at some distance below it. 



5. C. luteolus, Gr. Stems twining several feet long; leaves triangular-hastate or 

 sagittate, the basal lobes sometimes 2-lobed; peduncles bearing a pair of linear or lan- 

 ceolate entire bracts, a little below the flower; a second flower occasionally from the 

 axil of one of them; corolla pale yellow or purplish, an inch or more in length; stigmas 

 linear. 



2. CRESSA, L. 



Corolla deeply 5-cleft; the oblong or ovate lobes more than half the length of the 

 somewhat campanulate tube. Stamens and the 2 distinct styles exserted. Stigmas 

 capitate. 



1. C. Cretica, L. A span or two high, silky-villous and hoary; leaves very 

 numerous, 2 to 4 lines long, almost sessile; flowers sessile or nearly so in the upper axils; 

 corolla 2 or 3 lines long, white. On saline or alkaline soil. 



3. CUSCUTA, Tourn. DODDER. 



Calyx 5-4-cleft or parted. Corolla campanulate or short-tubular, the spreading limb 

 5-4-parted. Styles in our species 2, distinct. Seeds germinating in the soil, but the 

 thread-like, branching, leafless, yellowish or reddish twining stems becoming parasitic on 

 the bark of herbs or small shrubs; being attached by means of suckers. Flowers small, 

 cymose or densely clustered, white or whitish. 



* Capsule depressed-globose. 



1. C. Californica, Choisy. Flowers pedicelled in loose few-flowered cymes; lobes of 

 the calyx acute; lobes of the corolla lanceolate-subulate, delicate white; no scales below 

 the stamens. 



Var. breviflora, Engel. Flowers scarcely over a line long; calyx lobes equaling the 

 corolla-tube. 



