Jacquemontia agrestis (Mart. ex Choisy) Meisn.
Family: Convolvulaceae
(english: midnightblue clustervine, midnight-blue clustervine)
[Jacquemontia evolvuloides var. longepedunculata ,  more]
Jacquemontia agrestis image
Montañez, M.P.  
PLANT: vines with stems with glandular and/or stellate trichomes, annual (rarely perennial farther south in range). LEAVES: lanceolate to broadly or narrowly ovate, 1-6 cm. long, 0.5-3.5 cm. wide, basally cordate to subtruncate, apically acute to acuminate or rarely obtuse. INFLORESCENCE: monochasial. FLOWERS: (1-)2-6; on peduncles 1-8 cm long, the pedicels 3-15 mm long, erect in fruit; bracts linear, inconspicuous; sepals subequal or the inner shorter, ovate, narrowly ovate or lanceolate, 3.5-6.5 mm. long, with long attenuate apices, with only stellate trichomes or stellate and glandular indumentum; corollas subrotate to campanulate, 6-12 mm long, blue, glabrous; stamens unequal, 3.5-7 mm long, included; anthers 1 mm long; ovary subglobose, 1 mm long, 2-locular, glabrous; styles 3-5.5 mm long. FRUITS: capsular, subglobose, 4-5 mm. wide; seeds 1-4, 2-3 mm long, trigonous, semicircular in longitudinal section, minutely areolate and strongly verrucose, minutely winged on the outer 2 margins. NOTES: Cultivated fields, disturbed margins, desertscrub; Pima Co.; 1100-1200 m. (3500-4000 ft.); Sep-Mar; Baja C., Son., Sin., Dgo., Nay., Jal., Ver., s to Arg.; also in Cuba. The species is easily identified when glandular trichomes are present. When lacking glandular trichomes, it still can be distinguished from the other species in nearby Sonora by its clustered few-flowered cymes and lanceolate sepals. REFERENCES: Austin, Daniel F. Southwestern 2006. Convolvulaceae. CANOTIA 2 (3): 79-106.
Austin 1998, Kearney and Peebles 1969
Duration: Annual Nativity: Non-Native Lifeform: Vine General: Herbaceous vining annuals, stems generally herbaceous throughout, surfaces pubescent with forked or stellate hairs. Leaves: Alternate, lanceolate to broadly or narrowly ovate, 1-6 cm long, 0.5-3.5 cm wide, bases rounded to subcordate, the tips acute to acuminate or rarely obtuse, blades petiolate. Flowers: Deep blue or purple, sometimes with white striping, narrowly funnelform, 6-12 mm long, glabrous, sepals nearly all alike, (rarely subequal or the inner shorter), lanceolate to lance-ovate, 3.5-6.5 mm long, with long attenuate apices, stamens included, unequal, 3.5-7 mm long, anthers 1 mm long, ovary subglobose, 1 mm long, 2-locular, glabrous, styles 3-5.5 mm long, flowers with inconspicuous, linear subtending bracts, borne in groups of 1-6 on peduncles 1-8 cm long, the pedicels 3-15 mm long, erect in fruit. Fruits: Capsules, subglobose, 4-5 mm. wide. Seeds 1-4, 2-3 mm long, trigonous, semicircular in longitudinal section, minutely areolate and strongly warty (verrucose), minutely winged on the outer 2 margins. Ecology: Found in cultivated fields, disturbed margins, and desertscrub communities, from 3,500-4,000 ft (1067-1372 m); flowering September-March. Distribution: Arizona; Mexico. Notes: The purple, funnelform flowers (sometimes with white stripes), the round capsules of the fruits, and the lanceolate to broadly ovate leaves are good indicators for this species. Good keys for this species are the annual duration, forked or stellate hairs of the pubescence, petioled leaves with round or subcordate bases, flowers on long peduncles with solitary or in small, loose inflorescences, deep blue to lavender, narrowly funnelform corollas, and the stems which are herbaceous throughout and loosely soft-pilose. Also look to the sepals which are nearly alike in size and shape and lanceolate to lance-ovate with acuminate tips. Ethnobotany: Unknown, but other species in the genus have uses. Etymology: Jacquemontia is named for Victor Jacquemont a 19th century French botanist, while agrestis means growing in the fields. Synonyms: Convolvulus agrestis, Jacquemontia palmeri Editor: LCrumbacher2012
Jacquemontia agrestis image
José Jesús Sánchez-Escalante  
Jacquemontia agrestis image
José Jesús Sánchez-Escalante  
Jacquemontia agrestis image
Jacquemontia agrestis image
Jacquemontia agrestis image
Jacquemontia agrestis image
Jacquemontia agrestis image
Jacquemontia agrestis image
Jacquemontia agrestis image
José Jesús Sánchez-Escalante  
Jacquemontia agrestis image
Jacquemontia agrestis image