289 
** Ovary entire: leafy plants, mostly twiners. 
+ Corolla plicate at sinuses and the plaits convolute. 
2. Ipomeea. Style undivided, with stigma capitate or 2 or 3-globose. 
3. Jacquemontia. Style undivided, with 2 ovate or oblong thick but somewhat 
flattened stigmas. 
4, Convolvulus. Style undivided or 2-cleft only at apex; stigmas 2, linear-fili- 
form to subulate or ovate, when broad sometimes flattish. 
5. Breweria. Style 2-cleft or 2-parted; divisions simple; stigmas capitate. 
6. Evolvulus. Styles 2, each 2-cleft; stigmas linear-filiform: not twining. 
+ + Corolla not plicate, but 5-cleft. 
7. Cressa. Styles 2, distinct, entire; stigmas capitate: not twining. 
** * Ovary entire: leafless parasitic twining herbs, never green, 
8. Cuscuta. The only genus. 
1. DICHONDRA Forst. 
Small and creeping pubescent perennial herbs, with kidney-shaped 
entire leaves, axillary bractless peduncles bearing a small yellowish or 
white flower, 5-parted calyx, broadly bell-shaped 5-cleft corolla, included 
stamens, and 2 distinct styles, ovaries, and utricular 1 or 2-seeded 
pods, 
1. D. repens Forst. Soft-pubescent or slightly sericeous, but green or greenish: 
leaves mostly with deep sinus: corolla-lobes nearly glabrous.—Wet ground, near the 
coast and throughout southern Texas. 
2. D. argentea Willd. Canescently sericeous and silvery: leaves mostly with 
shallow sinus or even truncate: corolla lobes villous outside.—Southern and western 
borders of Texas. 
2. IPOMGA L. (MORNING GLORY.) 
Mainly twining herbs (some prostrate, diffuse, or even erect), with 
calyx not bracteate at base (but outer sepals commonly larger), salver- 
form or funnelform to nearly campanulate corolla with entire or slightly 
lobed limb, undivided style terminated by a single capitate or 2 or 3- 
globose stigma, and a globular 4 to 6-seeded 2 to 4-valved pod. 
* Corolla salverform, or with somewhat funnelform but narrow tube: stamens and style 
exserted : flowers red. 
1. I. coccinea L. Rather tall-climbing: leaves cordate, acuminate, entire or 
angled: sepals awn-pointed: corolla light scarlet, 2.5 cm. long. (Quamoclit coccinea 
Meench. )—-River banks, ete, naturalized in Middle and Southern Atlantic States; 
probably indigenous in western borders of Texas and westward. In western Texas 
there also occurs Var, HEDERIFOLIA Gray, with leaves from angulate to 3-lobed or 
even 3-parted, or sometimes pedately 5-parted. 
** Corolla funnelform or nearly campanulate: stamens and style not exserted. 
+ Lobes of stigma and cells 3: sepals long and narrow, attenuate upward, mostly hirsute 
below: corolla purple, blue, and white. 
2. I. Mexicana Gray. Root annual: leaves deeply 3-lobed and deeply cordate; 
lobes ovate or ovate-lanceolate, middle one broadest (sometimes narrowed) at base: 
peduncles 1 to 7.5 em, long, 1 to 3-flowered: fruiting pedicels as long as calyx: sepals 
lanceolate, 12 mm. long: corolia violet-purple, 2.5 cm. long.—In the mountains west 
of the Pecos. 
