Ipomoea lineolata Urb.

Wood, John R. I., Munoz-Rodriguez, Pablo, Williams, Bethany R. M. & Scotland, Robert W., 2020, A foundation monograph of Ipomoea (Convolvulaceae) in the New World, PhytoKeys 143, pp. 1-823 : 1

210. Ipomoea lineolata Urb. , Symb. Antill. 3 (3): 355. 1903. (Urban 1902-1903: 355)

Ipomoea grisebachii Urb. (1903: 353) , nom. illeg., non Ipomoea grisebachii Prain (1894) . Type. JAMAICA. Guy’s Hill, Moneague, Alexander s.n. (lectotype K000612811, designated by Wood and Scotland 2017c: 14).

Ipomoea rubella House , Bot. Gaz. 43: 414. 1907. (House 1907b: 414). Type. Based on I. grisebachii Urb.

Ipomoea carmesina Proctor, J. Arnold Arbor. 63(3): 292. 1982. (Proctor 1982: 292). Type. JAMAICA. [Trelawny], near Crown Lands road extension 4.5-5 miles NW of Troy, 7 Sept. 1974, G.R. Proctor 34169 (holotype IJ!).

Type.

JAMAICA. Wilson "1126 aut 1155" (probably destroyed at B in 1943, no duplicate found at NY, neotype G.R. Proctor 10429 (BM001122860), from Dolphin Head, Jamaica, designated by Wood and Scotland 2017c: 14).

Description.

Liana climbing over scrub to 5 m; stems woody, glabrous, reddish-brown. Leaves petiolate, palmately divided into 3-5(-7) petiolate leaflets, the terminal leaflet larger, leaflets 2.3-12 × 1.5-5 cm, lanceolate to oblanceolate, obovate or elliptic, acuminate-caudate, mucronate, narrowed at base into a petiole 5-10 mm long, glabrous, abaxially paler with numerous lateral veins; petioles 1.6-6 cm. Inflorescence of pedunculate, axillary cymes with 3 to many flowers, primary peduncles 2-11 cm, stout, sometimes forming a rachis of a raceme; bracteoles caducous, not seen; pedicels 0.7-3.5 cm, thickened upwards; sepals subequal coriaceous, glabrous, suborbicular-elliptic, acute, obtuse or rounded, outer 5-10 mm, inner 10-12 mm; corolla 5-6 cm long, funnel-shaped, glabrous, pink; limb 3-4.5 cm diam. Capsules ovoid, shortly rostrate, glabrous; seeds long-pilose with hairs to 12 mm.

Illustration.

Figure 107B-E .

Distribution.

Endemic to Jamaica where it gows in mountain woodland.

JAMAICA. Clarendon, G.L. Webster & G.R. Proctor 5413 (BM); Hanover, G.R. Proctor 10429 (BM); Manchester, Purdie s.n. (K); Portland, H.A. Osmaston 5101 (BM); St Andrew, T.G. Yuncker 17184 (BM); St Ann, G.L. Webster & G.R. Proctor 5639 (A, BM, MICH); St Catherine, G.R. Proctor 34186 (BM); St James, W. Stearn 31 (BM); St Thomas, C.D. Adams 7262 (BM); Trelawny, G.R. Proctor 21374 (BM).

Notes.

This is the Jamaica counterpart of Ipomoea furcyensis and I. carolina . It is distinguished by its (usually) broadly elliptic, ovate to obovate leaflets and slightly larger corolla.

Ipomoea lineolata is quite variable, particularly in the number of leaflets (3-7) and in their shape (lanceolate to oblanceolate, obovate or elliptic), the leaflets narrowed to a petiolar base. The corolla varies somewhat in length but is usually 5-6 cm long and the anthers are held at the mouth of the corolla and are not clearly exserted. The inflorescence is much branched in most plants (and also in the type of I. carmesina ) but specimens with 3-5-flowered cymes are not uncommon. It should be noted that all these populations have leaves divided into distinct leaflets with a petiolar base including the oldest specimen of wild provenance we have seen (Purdie s.n.) collected in November 1843.

Figures

Figure 107. Ipomoea horsfalliae A habit showing lobed leaves found in some cultivated forms. B-E I. lineolata B habit C outer sepal D inner sepal E corolla opened out to show stamens. Drawn by Rosemary Wise A from Jack 4278; B-E from Fosberg 42712.