Plant: annual herb; from a fibrous root system; stems twining

Leaves: simple, cordate, acuminate, 2-6 cm long, 1.4-3.8 cm wide, glabrous, the petioles 0.5-6.5 cm long

INFLORESCENCE: cymose, 1-2-flowered; peduncles 1.5-4.5 cm long; bracts scale-like, caducous

Flowers: on pedicels 10-18 mm long, reflexing in fruit; sepals triangular, glabrous, 6 mm long, 3-4 mm wide, acute, rugose along the midvein, scarious-margined, the inner sepals somewhat wider than outer ones; corollas funnelform, 2.6-2.7 cm long, blue (drying purple or pinkish), glabrous, the limb 3-3.5 cm wide; stamens 10-13 mm long, included, the anthers 1-2 mm long; ovary conic, 2-2.5 mm long, 2-locular, glabrous; style 11 mm long, green

Fruit: FRUITS ovoid, 10-12 mm long, tan to brown, the apiculum to 4 mm long. SEEDS 1-4, 5-6 mm long, ovoid, brown, finely appressed-tomentose

Misc: Desertscrub; 1150 m (3700 ft); Sep

REFERENCES: Austin, Daniel F. 1998. J. Ariz. - Nev. Acad. Sci. Convolvulaceae 30(2): 61.

REFERENCES: Austin, Daniel F. 1998. J. Ariz. - Nev. Acad. Sci. Convolvulaceae 30(2): 61.

Duration: Annual

Nativity: Native

Lifeform: Vine

General: Annual herbs with twining stems, branching, smooth or with small warts, glabrous.

Leaves: Blades 2.4-5.5 cm long, 3.2-6.7 cm wide, ovate, entire, apically acuminate, attenuate, membranous, basally cordate, with petioles 1.2-10.3 cm long.

Flowers: Pedicels 10-18 mm long, reflexing in fruit; sepals 4-6 mm long, 1.5-2 mm wide, equal, ovate-lanceolate, acute, with a thick, muricate, raised midrib, margins hyaline; corollas 2-3 cm long, funnelform, dark blue, the throat white, the interior yellow, glabrous.

Fruits: Capsules 6-12 mm long, ovoid, tan brown when dry, glabrous. Seeds 4, 4-6 mm long, ellipsoid, dark brownblack, puberulent.

Ecology: Found in desertscrub; below 3700 ft (1150 m); flowers August-November.

Distribution: se AZ, sw NM, sw TX; south to s MEX.

Notes: Distinguished from other regional Ipomoea by being hairless on the entire plants; entire, heart-shaped leaves (hence the species name); hairless sepals which wrap tightly around the immature ovary; and blue corollas with yellow throats.

Ethnobotany: Unknown

Etymology: Ipomoea comes from Greek ips, a worm and homoios, like, referring to plant-s habit, while -cardio- refers to heart and -phylla- means leaf, referring to the heart-shaped leaves.

Synonyms: Ipomoea aristolochiifolia

Editor: FSCoburn 2015