5. Jacquemontia agrestis (Martius ex Choisy) Meisner in C. F. P. von Martius et al., Fl. Bras. 7: 306. 1869.
Midnight blue clustervine
Convolvulus agrestis Martius ex Choisy in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 9: 405. 1845; Jacquemontia palmeri S. Watson
Herbs or weak vines, rarely perennial, often delicate, 0.4–1.2 m. Herbage hairy, hairs of 2 types: 1) stellate and 3-armed, 2) simple, stalked-glandular, the latter sometimes absent. Stems slender, erect, prostrate, or scandent. Leaf blades broadly to narrowly ovate, 10–55 × 5–35 mm, base cordate to truncate, apex acuminate. Inflorescences lax, 1–6-flowered; bracts linear, inconspicuous. Flowers: sepals subequal or outers longer than inners, lanceolate to lance-ovate, 3–5 mm; corolla blue, narrowly funnelform to subrotate, 6–12 mm, limb 5-angled. Capsules subglobose, 4–5 mm. Seeds 2–3 mm, outer 2 margins narrowly winged.
Flowering Sep–Mar. Canyons; 1000–1300 m; Ariz.; Mexico (Baja California, Baja California Sur, Sonora); Central America; South America.
Jacquemontia agrestis reaches its northern limit of distribution in Pima County, Arizona.
