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Jacquemontia pentantha (Jacq.) G. Don, Gen. Syst. 4:283. 1838. van Ooststroom in van Steenis, Fl. Males., ser. 1, 4:435.1953, Robertson, A revision of the genus Jacquemontia (Convolvulaceae) in North & Central America & the West Indies, Ph.D. thesis, Washington University, St. Louis, Missouri ,1971, R.R. Stewart, Ann. Catalogue Pl. W. Pak. & Kashm. 577.1972, Austin in Ann. Missouri lot. Gard. 62:172.1975. (Fig. 7, A).
DANIEL F. AUSTIN
Florida Atlantic University, Boca Raton, Florida, USA
Convolvulus pentanthus Jacq.
Climbers, the stems herbaceous, pubescent to glabrate. Leaves ovate to broadly ovate, 3-6 cm long, basally cordate, apically acuminate, glabrate. Flowers in dense cymes, usually with 1-2 flowers opening at any one time. Sepals ovate to lanceolate, acute to acuminate, 4-5 x 2-4 mm, pubescent. Corolla mostly blue, sometimes white, 2 cm long. Fruit capsular, globose, brown, glabrous. Seeds brown, 2.5 mm long, glabrous.
Fl. Per.: June to August.
Type.: Jacquin herb. (lectotype, D’Arcy, Taxon 19:554-560.1970, W.).
D-4 Sind: Karachi, R. Ali 2086 (RAW), Karachi, Gandhi Gardens, 20.11.1965, Saida Qureshi s.n. (KUH). Distribution: An American species, cultivated and occasionally escaped in several Asian countries.
This species and Jacquemontia paniculata (Burm. f.) Hallier f. are often difficult to separate on herbarium specimens. Normally the sepals of Jacquemontia pentantha are only 2-4 mm wide wh ile those of Jacquemontia paniculata are 5-6 mm wide. Corollas of Jacquemontia pentantha are 2 cm long, wh ile those of Jacquemontia paniculata are up to 1 cm long.
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