CONVOLVULACEAE 965 
8. JACQUEMONTIA Choisy. 
Annual or usually perennial trailing or twining vines, or upright herbs or shrubs. 
Leaves alternate: blades entire or rarely toothed or lobed. Flowers usually in loose or 
congested cymes, these sometimes conspicuous on account of densely pubescent bracts. 
Sepals nearly equal, or the outer much broader than the inner. Corolla white, blue or 
violet, companulate: limb plaited, 5-angled or 5-lobed. Stamens 5, not surpassing the 
corolla. Filaments filiform or dilated at the base, adnate to the base of the corolla-tube. 
Ovary 2-celled. Styles united to the stigmas. Ovules 4, 2 in each cavity. Capsule sub- 
globose, 4-valved. Seeds glabrous. The plants flower mainly from spring to fall. 
Bracts and calyx glabrous, at least not conspicuously pubescent. 
Leaf-blades acuminate or cuneate at the base: flowers solitary or 2 together, 1. J. Curtissii. 
Leaf-blades abruptly narrowed or truncate at the base: flowers several together. 2. J. pentantha. 
Bracts and calyx conspicuous on account of the dense spreading pubescence. 3. J. tamnifolia. 
1. Jacquemontia Curtissii Peter. Perennial, glabrous, or slightly cobwebby-pubes- 
cent. Stems prostrate or spreading, branching, 2-9 dm. long: leaves alternate; blades 
leathery, oblong to oblong-spatulate, varying to slightly broadest below the middle, 1-2 
em. long, obtuse or abruptly pointed, entire, slightly revolute, short-petioled : peduncles 
usually shorter than the leaves, 1-2-flowered : pedicels commonly longer than the peduncle : 
sepals orbicular-ovate to oval, becoming 6-8 mm. long: corolla violet or whitish, 2.5-3 
cm. broad, the lobes rounded : capsules 8-9 mm. long. 
In rocky or caleareous soil, southern peninsular Florida. 
2. Jacquemontia pentántha (Jacq.) G. Don. Annual or biennial, minutely 
pubescent or glabrate. Stems more or less diffusely branched, the branches 3-10 dm. long : 
leaf-blades ovate to oblong or ovate-lanceolate, 1.5-5 cm. long, acuminate, undulate, ab- 
ruptly contracted or truncate at the base ; petioles 5-30 cm. long : peduncles usually longer 
than the subtending leaves: sepals minutely pubescent at least when young, ovate or 
broadly ovate, 5-6 mm. long, acute or acuminate: corolla about 2 cm. broad, the angular 
lobes acute : capsules oval or oval-ovate, about 5 mm. long. [J. violacea (Vahl. ) Choisy. ] 
In sand, Florida Keys and tropical America. 
3. Jacquemontia tamnifólia (L.) Griseb. Annual, pubescent with tawny hairs. 
Stems erect or twining, branching, 2-12 dm. long: leaf-blades ovate to oblong-ovate, 5-12 
cm. long, acuminate, undulate, rounded or cordate at the base ; petioles shorter than the 
blades: peduncles as long as the subtending leaves or longer: clusters rather dense, con- 
spicuously bracted: sepals rusty-hirsute, linear-subulate, 7-9 mm. long, attenuate : corolla 
violet or blue, 1.5-3 em. wide: capsules spheroidal, 4-5 mm. in diameter. 
In fields and thickets, South Carolina and Arkansas to Florida and tropical America. 
9. CONVOLVULUS L. 
Ann al or perennial, trailing or twining vines, or upright herbs or shrubs. Leaves 
alternate : blades usually hastate or cordate at the base. Flowers solitary or clustered on 
axillary peduncles. Calyx naked or subtended by bracts: sepals 5, rearly equal, or the 
outer larger. Corolla white, pink or purple, funnelform or campanulate: limb plaited, 
entire, or 5-lobed or 5-angled. Stamens 5, included. Filaments filiform or dilated at the 
base. Ovary 1-2-celled. Styles united up to the stigmas. Ovules 4. Capsule globose or 
nearly so, 2-4-valved. Seeds glabrous. Our species are perennials, BINDWEED. 
Calyx enclosed by the 2 large bracts which subtend it. 
Stems trailing or climbing. 
Mature stem and leaves glabrous or glabrate : leaf-blades ovate or hastate. 
Leaf-blades with more or less angular spreading basal lobes. 1. C. Americanus. 
Leaf-blades with rounded or scarcely angular basal lobes which are not : 1 
spreading. 2. C. sepium, 
Mature stem and leaves copiously and softly pubescent : leaf-blades more or $ 
less sagittate. 3. C. repens. 
Stems erect or ascending. 4. C. spithamaeus. 
Calyx without bracts. 
Herbaceous: leaf-blades not leathery. 
Foliage glabrous or nearly so. 
Foliage densely pubescent. 
Sepals auricled at the base. 
Sepals not auricled. 
Shrubby : leaf-blades leathery. 
1. Convolvulus Americànus (Sims) Greene. Stems twining, 1-3 m. long, glabrate, 
more or less twisted : leaf-blades broadly hastate or ovate-hastate, 5-12 cm. long, acumi- 
nate or apiculate, undulate, cordate ; petioles as long as the blades or much shorter : peduncles 
5. C. arvensis. 
2 
. C. hermannioides, 
. C. incanus. 
. €. Havanensis. 
ANA 
