Ipomoea eggersiana A. Peter Die Natuerlichen Pflanzenfamilien

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

202. Ipomoea eggersiana A. Peter Die Natuerlichen Pflanzenfamilien 4 (3a): 30. 1897 [pub. 1891]. (Peter 1891: 30)

Exogonium eggersii House , Bull. Torrey Bot. Club 35: 104. 1908. (House 1908a: 104). Type. U.S. VIRGIN ISLANDS, St Thomas, Feb. 1887, H.F.A. von Eggers s.n. (holotype NY00111063, isotypes G, L).

Ipomoea eggersii (House) D.F. Austin , Ann. Missouri Bot. Gard. 64: 335. 1978. (Austin 1978a: 335)

Type.

U.S. VIRGIN ISLANDS, St Thomas, H.F.A. von Eggers 252 (lectotype GOET005714, designated by Staples et al. 2012: 674, isolectotypes G, K, NY, P).

Description.

Twining herb; stems somewhat woody, glabrous, roots tuberous, turnip-like, white latex abundant. Leaves clustered on brachyblasts, petiolate, very small, 0.5-0.9 × 0.3-0.7 cm, reniform, bilobed or digitately 3-lobed with the apical lobe bilobed, base truncate, lobes obtuse, glabrous, abaxially paler; petioles 0.3-09 cm. Inflorescence of solitary flowers or several in a raceme-like inflorescence up to 2.5 cm long; peduncles 2-3 mm; bracteoles minute, caducous; pedicels 5-7 mm; sepals glabrous, slightly unequal, outer 4-5 mm, oblong-ovate, rounded, scarious-margined, inner similar but 5-6 mm; corolla 3.5-4 cm long, broadly funnel-shaped, glabrous, tube greenish, limb lilac or pink, 2.5-4 cm diam. Capsules 11-13 × 6-7 mm, ellipsoid, the style persistent as a mucro, glabrous; seeds 5 × 2.5 mm, pilose with long marginal hairs up to 10 mm.

Illustration.

Acevedo-Rodríguez (2005: 168) (as Ipomoea eggersii ); Figures 11D , 105A-G .

Distribution.

Virgin Islands south east to Barbuda, in scrub near the shore.

LESSER ANTILLES. U.S. Virgin Islands: St Croix: Belleview Estate, R.A. Howard 15278 (BM); Ogdon & Wilson s.n. [18 Jan 1980] (BM); Lang’s Peak, F.R. Fosberg 60856 (MO); St Thomas: Lehmann 210 (K); N.L. Britton et al. 50 (K); Water Island, R.A. Woodbury WI-81 (MO, NY), H.F.A. von Eggers 529 (P). U.K. Virgin Islands: Norman Island: D.S. & H.B. Correll 50480 (NY). Netherlands Antilles: St Martin: R.A. Howard 18373 (A, NY). Anguilla: W. Urote 35 (BM); G.R. Proctor 18542 (BM). Barbuda: Gregory 1899 (BM).

Note.

Ipomoea eggersiana forms a species pair with I. steudelii , the two species differing only in their corolla shape, colour (crimson in I. steudelii , pink in I. eggersiana ) and distribution. The corolla of I. eggersiana is funnel-shaped, whereas that of I. steudelii is hypocrateriform with exserted stamens.

Figures

Figure 11. Seeds of Ipomoea A I. peteri B I. murucoides C I. carolina D I. eggersiana E I. longibarbis (with and without marginal hairs) F I. clavata G I. violacea H I. acanthocarpa J I. parvibracteolata K I. meyeri L I. jujuyensis M I. cholulensis N I. minutiflora P I. tiliacea. A from Wallnoefer & Tut-Tesucun 9662; B from Pringle 6066; C from Gillis 12906; D from Urote 35; E from Killeen et al. 4199; F from Fuentes & Miranda 10895; G from Stearn 322; H from Wurdack & Monachino 39830; J from Silva et al. 18; K from Smith 1573; L from Rose et al. 23251; M from Hinton 11166; N from Stevens & Montiel 26592; P from Curtiss 249. Drawn by Rosemary Wise.

Figure 105. A-G Ipomoea eggersiana. A habit B outer sepal C inner sepal D corolla opened out to show stamens E style F fruiting inflorescence with capsules G seed. Ipomoea steudelii. H corolla. Drawn by Rosemary Wise A from von Rohr s. n.; B-G from Urote 35; H from Drucker 138.