A foundation monograph of Ipomoea (Convolvulaceae) in the New World Author Wood, John R. I. Author Munoz-Rodriguez, Pablo Author Williams, Bethany R. M. Author Scotland, Robert W. text PhytoKeys 2020 143 1 823 http://dx.doi.org/10.3897/phytokeys.143.32821 journal article http://dx.doi.org/10.3897/phytokeys.143.32821 1314-2003-143-1 F6F11A6EE4FF5A1885CEA2B60AE965A5 235. Ipomoea jamaicensis G. Don , Gen. Hist. 4 : 278. 1838. (Don 1838: 278) Convolvulus jamaicensis Spreng. , Syst. Veg. 1 : 595. 1825 [pub. 1824]. (Sprengel 1824: 595), nom. illeg., Convolvulus jamaicensis Jacq. (1768) . Type. JAMAICA. No type cited, neotype icon in Sloane , Voy. Jamaica 1 : t. 98, f. 2 (1707), designated here. Pharbitis jamaicensis (G. Don) Gibert , Enum. Pl. 28 . 1873 (Gibert 1873: 28). Convolvulus tomentosus L. , Sp. Pl. 1 : 156. 1753. Type. Icon in Sloane , Voy. Jamaica 1 : t. 98, f. 2 (1707), designated by Staples and Jarvis (2006: 1022). Pharbitis tomentosa (L.) Choisy in A.P. de Candolle , Prodr. 9 : 342.1845. (Choisy 1845: 342). Ipomoea tomentosa (L.) Urb. , Symb. Antill. 3 (2): 344. 1902. (Urban 1902-3: 344), nom. illeg., non Ipomoea tomentosa Choisy (1838) . Type. Based on Convolvulus jamaicensis Spreng. Description. Liana to 6 m, stems woody, pubescent when young. Leaves petiolate, 3.5-10 x 3.5-11 cm, ovate in outline, 3-lobed to about half way, shortly acuminate, base cordate with rounded auricles, adaxially pubescent, abaxially grey-tomentose, rarely glabrous on both surfaces; petioles 2.5-5 cm, very thinly to densely pubescent. Inflorescence of few-flowered pedunculate cymes; peduncles 1.5-8.5 cm; bracteoles 3-12 mm, ovate, acuminate, pale green, caducous; pedicels 3-12 mm, noticeably more slender and more pubescent than peduncles; sepals subequal but inner slightly narrower, 10-14 x 2-4 mm at anthesis, oblong-lanceolate, shortly acuminate to caudate, pubescent, herbaceous, somewhat accrescent in fruit reaching 15 x 8 mm; corolla 5-7 cm long, glabrous, salver-shaped, the tube 4-5 cm long, subcylindrical and only slightly widened, dark purple, limb 4-5 cm diam., pentagonal, crimson to magenta, stamens exserted; stigma 3-lobed, exserted. Capsules 10 x 9 mm, subglobose, glabrous; seeds 5 x 4 mm, blackish, densely covered in short erect hairs. Illustration. Figure 122 . Figure 122. Ipomoea jamaicensis . A habit B adaxial leaf surface C abaxial leaf surface D outer sepal E inner sepal F corolla opened out to show stamens G ovary and style H fruiting inflorescence with capsule J seed. Drawn by Rosemary Wise A-C from Proctor 17443; D-J from Stearn 208. Distribution. Endemic to Jamaica where it appears to be common in thickets, scrub and in forest relics on limestone hills. JAMAICA. March s.n. (K); Manchester, C.D. Adams 8516 (BM); St Catherine, G.R. Proctor 7253, ibid., 8298, ibid., 17443 (BM); Great Goat Island, W. Harris 9212 (BM); St Andrew, G.R. Proctor 18336 (BM); Clarendon, W. Stearn 208 (BM). Note. This species appears to have evolved as an adaptation of Ipomoea indica for humming bird pollination. It differs in the exserted stamens from a salver-shaped corolla as well as in the leaves, which are always three lobed.