Ipomoea lacunosa L. Sp. Pl.

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

224. Ipomoea lacunosa L. Sp. Pl. 1: 161. 1753. (Linnaeus 1753: 161)

Ipomoea triloba forma lacunosa (L.) Nishyama, Bot.Mag. Tokyo 84: 385. 1971. (Nishiyama 1971: 385).

Convolvulus ciliolatus Michx., Fl. Bor.-Amer. 1: 137. 1803. (Michaux 1803: 183). Type. UNITED STATES. Tennessee, Nashville, collector and whereabouts unknown.

Ipomoea ciliolata (Michx.) Pers. , Syn. Pl. 1: 180. 1805. (Persoon 1805: 180).

Ipomoea ciliosa Pursh , Fl. Amer. Sept. 1: 146. 1813. (Pursh 1813: 146). Type. Based on Convolvulus ciliolatus Michx.

Ipomoea verrucipes Ten. ex C.A. Mey., Index Seminum (St Petersburg) 1843: 76. 1843. (Meyer 1843: 76). Type. Not cited, but reported by Choisy to have been grown from seeds from Mexico.

Type.

UNITED STATES. Carolina, lectotype, Dillenius, Hort. Eltham. 1: 103. t. 87, f. 102 [103] designated by Staples in Staples and Jarvis in Taxon 55: 1022. 2006.

Description.

Slender twining annual herb, stems glabrous to thinly pilose. Leaves petiolate, 3-8 × 2-7 cm. usually ovate, acuminate and base cordate with rounded auricles but sometimes 3- or 5-lobed with shortly acuminate lateral lobes, subglabrous or more commonly with scattered long hairs; petioles 1-9 cm. Inflorescence of shortly pedunculate 1-3-flowered cymes; peduncles 0.6-6.5 cm, very variable in length, usually pubescent; bracteoles 2-4 mm long, filiform; pedicels 2-8 mm; sepals subequal, 10-14 × 2-4 mm, somewhat accrescent in fruit, narrowly to broadly ovate, acuminate to a long fine aristate tip, ciliate on margins and often also pilose; corolla 1.8-2 cm long, funnel-shaped, white or pale pink, glabrous, limb c. 1 cm diam., shortly lobed, the lobes mucronate. Capsules subglobose, 10-15 mm long and wide, pilose; seeds 5-6 mm long, dark brown, ellipsoid, glabrous.

Illustration.

Figures 110B , 115 ; Haddock et al. (2015: 234).

Distribution.

A weedy species of the south eastern United States extending north to Pennsylvania, Illinois and Indiana and west to Texas and Missouri. Perhaps occurring as an ephemeral weed outside the United States, for example in Jamaica (Adams 1972), but all records in the New World from outside the eastern United States require confirmation. Outside the Americas it is reported as an adventive in Europe (Sell and Murrell 2009: 348) and East Asia (Fang and Staples 1997: 301).

UNITED STATES. Alabama: S.B. Buckley s.n. (OXF); C.T. Bryson & K. Reddy 20432 (ARIZ). Arkansas: R.A. Thompson et al. 1004 (K); T. Nuttall s.n. (OXF). Delaware: W.D. Longbottom 16023 (NY). Florida: Jacksonville, Drummond (K); D.H. Williams 2635 (SEL). Georgia: W.S.B. Jones et al. 1554 (BM); R.M. Harper 520 (BM, E, K); T. Nuttall (OXF). Illinois: F.E. McDonald s.n. [9/1913] (S). Indiana: R.F. Schulenberg 75-1363 (MOR). Kansas: R.L. McGregor 266 (S). Kentucky: C.W. Short s.n. (K). Louisiana: Monroe, Dale Thomas 21174 (BM); E.J. Palmer 8823 (K). Maryland & D.C.: E.S. Steele s.n. (E). Missouri: J. Steyermark 76626 (BM); R.T. Ovrebo & C.M. Sladewski 1003 (K). Mississippi: C. T. Bryson & K. Reddy 20353 (ARIZ). North Carolina: Biltmore 2575a (S); J.H. Horton 321 (BM). Ohio: J.F. James 2158 (BM); 2163 (K). Pennsylvania: J. Ebert s.n. [8/10/2006] (MOAR). South Carolina: T. Nuttall s.n. (OXF); R.D. Porcher 2132 (CLEMS). Tennessee: A. Ruth s.n. [9/1895] (S); Rugel s.n. (OXF). Texas: D.S. & H.B. Correll 32046 (LL). Virginia: Bedford Co., A.H. Curtiss s.n. (E); K.K. Mackenzie 1778 (E); E.K. Balls 7792 p.p. (BM). West Virginia: R. Hall et al. 52 (MUHW).

Note.

Distinguished by the small white corolla and relatively large capsule (> 10 mm wide, not less than 9 mm).

Figures

Figure 110. Photographs of Ipomoea species. A I. grandifolia B I. lacunosa C I. littoralis D I. cryptica E, F I. batatas. A, D-F John Wood B Steven Turner C Rick Miller.

Figure 115. Ipomoea lacunosa. A habit B simple leaf C outer sepal D inner sepal E capsule with calyx F seed. Drawn by Rosemary Wise A from McCarthy s. n.; B from Mackenzie s. n.; C-F from Harper 520.