Ipomoea mauritiana Jacq.

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

157. Ipomoea mauritiana Jacq. , Collectanea 4: 216. 1790 [pub.1791]: 216 (Jacquin 1791: 216)

Ipomoea paniculata var. mauritiana (Jacq.) Kuntze , Rev. Gen. 2: 445 (Kuntze 1891: 445).

Convolvulus paniculatus L., Sp. Pl., ed. 1, 156. 1753. (Linnaeus 1753: 156). Type. Icon in Rheede, Hort. Malab. 11, t. 49 (1692), lectotype designated by Verdcourt (1963: 135).

Ipomoea paniculata (L.) R. Br., Prodr. 486.1810. (Brown, R. 1810: 486), nom. illeg., non Ipomoea paniculata Burm. f. (1768).

Batatas paniculata (L.) Choisy, Mém. Soc. Phys. Genève 6: 436 (54). 1834. (Choisy 1834: 436 [54]).

Modesta paniculata (L.) Raf., Fl. Tellur. 4: 75. 1836 [pub. 1838]. (Rafinesque 1838a: 75).

Ipomoea gossypifolia Willd, Enum. Pl. 208.1809. (Willdenow 1809: 208). Type. Plant of unknown origin (holotype B-W03761).

Convolvulus insignis Andrews , Bot. Reposit 10: t. 636. 1811. (Andrews 1810-15: t. 636). Type. Cultivated plant of unknown origin, lectotype Icon, t. 636 in Bot. Reposit. 10, designated here.

Ipomoea insignis (Andrews) Spreng., Syst. Veg. , ed. 16, 1: 592. 1825 [pub.1824]. (Sprengel 1824: 592).

Modesta insignis (Andrews) Raf. , Fl. Tellur. 4: 76. 1836 [pub. 1838]. (Rafinesque 1838a: 76).

Ipomoea ennealoba P. Beauv., Flore d'Oware 2: 69. 1819. (Beauvois 1808-20: 69). Type. “Chama” (lectotype Plate 101 in Beauvois (1808-20), designated here).

Ipomoea eriosperma P. Beauv., Flore d'Oware 2: 73. 1819. (Beauvois 1808-20: 73). Type. "le long de la mer depuis Chama jusqu’a la rivière Formose" (lectotype Plate 105 in Beauvois (1808-20), designated here).

Ipomoea bignonioides Sims , Bot. Mag. 53: t. 2645. 1826. (Sims 1826: t. 2645). Type. Icon, t. 2645 in Bot. Mag., epitype, Schomburgk 701 (K000768180), designated by Wood and Scotland 2017a: 6).

Convolvulus bignonioides (Sims) Spreng., Syst. Veg. , ed. 16, 4(2, Cur. Post.): 60. 1827. (Sprengel 1827: 60).

Apopleumon bignonioides (Sims) Raf. , Fl. Tellur. 4: 72. 1836 [pub. 1838]. (Rafinesque 1838a: 72).

Batatas bignonioides (Sims) G. Don , Gen. Hist. 4: 261. 1838. (Don 1838: 261).

Ipomoea pedata G. Don , Gen. Hist. 4: 281. 1838. (Don 1838: 281). Type. ECUADOR. Guayaquil, Ruiz & Pavón (lectotype MA 814670, designated by Wood et al. (2015: 83), isolectotype MA 814671).

Ipomoea pavonii Choisy in A.P. de Candolle , Prodr. 9: 390. 1845. (Choisy 1845: 390). Type. ECUADOR. Guayaquil, J.A. Pavón (lectotype G00227879, designated here).

Batatas edulis var. platanifolia Choisy in A.P. de Candolle , Prodr. 9: 339. 1845. (Choisy 1845: 339). Type. GUYANA. R. Schomburgk 701 (isotype BM, BR, K, OXF).

Ipomoea digitata var. quinquefida Meisn. in Martius et al. , Fl. Brasil. 7: 278. 1869. (Meisner 1869: 278). Type. GUYANA. R. Schomburgk 701 (lectotype BR0000530737, chosen by Wood and Scotland 2017a: 6).

Ipomoea digitata var. septemfida Meisn. in Martius et al. , Fl. Brasil. 7: 279. 1869. (Meisner 1869: 279). Type. INDIA. N. Wallich 1350 (lectotype K001112845, designated here).

Ipomoea digitata var. septempartita Meisn. in Martius et al. , Fl. Brasil. 7: 279. 1869. (Meisner 1869: 279), p.p. quoad Burchell 9924 (BR).

Ipomoea supersticiosa Barb. Rodr., Vellosia 1885 -6, 1: 61, t. 17. (Barbosa Rodrigues 1885-6: 61). Type. BRAZIL. Amazonas, Ríos Negro & Yauapery, J. Barbosa Rodrigues in Mus. Bot. Amaz. 634 (whereabouts unknown, lectotype t. 17 in Barbosa Rodrigues 1885-6, designated here).

Ipomoea paniculata var. heterophylla Kuntze , Rev. Gen. 2: 445. 1891. (Kuntze 1891: 445). Type. ECUADOR. Guayas, Guayaquil, Sinclair s.n. (K ex Herb Bentham, lectotype designated here).

Ipomoea digitata auct. mult.

Type.

Plant, reputedly from Maurice (Mauritius) cultivated in Vienna, probably not preserved; possible type tab. 200 in Hort. Schoenb. (Jacquin 1797).

Description.

Vigorous creeping or climbing perennial, stems somewhat woody, sometimes winged when old, glabrous. Leaves petiolate, 5-14 × 6-16 cm, 5-lobed to about two thirds, base shallowly cordate to truncate and cuneate onto the petiole, lobes elliptic, narrowed at both ends, apex obtuse, both surfaces glabrous, abaxially paler; petioles 2-6 cm, usually glabrous. Inflorescence of pedunculate axillary, occasionally compound cymes; peduncles 3-13 cm, glabrous or puberulent; bracteoles c. 6 mm long, linear, caducous; secondary peduncles (if present) 5-15 mm; pedicels 5-22 mm, puberulent; calyx subglobose in outline, the sepals slightly unequal, elliptic, convex, coriaceous with a very narrow scarious margin, glabrous or puberulent near base, 7-10 × 5-6 mm, the outer obtuse, the inner rounded; corolla 5-6 cm long, inflated above a narrow basal tube, pink, glabrous, limb c. 3 cm diam. Capsules 10-15 × 6-10 mm, ovoid, glabrous; seeds 6 mm long, lanate.

Illustration.

Figure 84C ; Austin (1998: 403); Bosser and Heine (2000: 37); Deroin (2001: 215).

Distribution.

Pantropical in distribution but preferring equatorial regions. Scattered and rather uncommon in the neotropics, perhaps more common in the Guianas than elsewhere in the New World.

BRAZIL. Amazonas: B.A. Krukoff 6510 (K, S). Maranhão: Froes in Krukoff 11650 (S). Rio de Janeiro: A. Glaziou 11262 (P). Rio Grande do Norte: M.T. Dawe (K). Pará: G.M. Pies & G.A. Black 1620 (P). Pernambuco: Fernando do Noronha, Ridley et al. 91 (BM, P). Also reported from Amapá in Flora do Brasil 2020 under construction.

GUYANA. A.S. Hitchcock 17513 (NY, S); Jansen-Jacobs et al. 4327 (K, U), 4759 (K, U); P. Maas et al. 7390 (K, U); N. Sandwith 158 (K).

SURINAM. Sterringa 12432 (K); Berthoud-Coulon 508 (BM).

FRENCH GUIANA: Rothery 177 (K); O. Tostain 232(P); M.F. Prevost 697 (P).

BOLIVIA. Beni: Iténez, D. Ibañez 295 (LPB). Pando: Manuripi, Conquista, E. de la Sota 976 (LIL); F. Fernández Casas & A. Susana 8598 (LPB, NY, MO). Santa Cruz: Germán Busch, Puerto Suárez, M. Mendoza et al. 2548 (USZ, K).

PERU. Loreto: Asplund 14512 (S); J. Ruiz 1168 (K); R. Vásquez et al. 3693 (K, MO, USM). Madre de Dios: Tambopata, Pampas del Heath, M. Aguilar & D. Castro 453 (MO, OXF).

ECUADOR. Guayas: Sinclair s.n. (K); K.T. Hartweg s.n. (K); L. Fraser s.n. (BM). Manabí: 50 km N of Pedernales, D. Neill et al. 11712A (MO, OXF, QCNE).

COLOMBIA. Amazonas: J.M. Duque 2439 (COL). Antioquia: E. Forero 1999 (COL). Casanare: C. Camargo 033 (COL).

VENEZUELA. Amazonas: Wessels Boer 1928 (K); Chaffanjon s.n. (P)

PANAMA. H. Pittier 4392 (US); Duchassaing s.n. (P)

COSTA RICA. Cahuita National Park, P. Wilkin & S.B. Jennings 119 (BM, MO); Limon, Puerto Viejo, A. Cascante & M. Zamora 388 (K).

NICARAGUA. P. Moreno 12360 (MO).

HONDURAS. La Mosquitia, C. Ashe 56 (BM); J. Hjalmarson 16/7/1852 (S).

BELIZE. Sittee River, W.A.Schipp 636 (BM, K, MO, S).

JAMAICA. G.R. Proctor 29322 (BM).

DOMINICAN REPUBLIC. E. Ekman H15635 (S), H12303 (S).

PUERTO RICO. Sine data (P)

LESSER ANTILLES. Guadeloupe: Stehlés.n. (P). Martinique: M. Belanger s.n. (P).

St. Vincent: L. Guilding s.n. (K). Barbados: E.G.B. Gooding 680 (BM).

TRINIDAD. B.O. Williams 12038 (K).

Typification.

Ipomoea pavonii Choisy is based on I. pedata G. Don as exemplified by the specimen at Geneva (G00227879). Hallier based Calonyction pavonii on the Tafalla specimen at G (00016027), which is Ipomoea setosa .

Ipomoea paniculata var. " eriocarpa (Beauv.) Kuntze " appears to be a mistake for var. eriosperma .

There are several syntypes of Ipomoea paniculata in the Wallich Herbarium, which could be selected as a lectotype of Ipomoea digitata var. septemfida. As there seems no suitable specimen in Martius’ herbarium, we have rather arbitrarly selected one of the Wallich specimens with 7-fid leaves as lectotype.

Note.

Ipomoea mauritana is a very variable plant, particularly in the Old World where forms with unlobed leaves are reported. It is somewhat unsatisfactorily distinguished from Ipomoea cheirophylla and similar species, and records in floras, checklists and data bases are often unreliable. It is a plant of humid tropical lowlands and the leaves are larger than in related species and the inflorescence is commonly compound. Sinclair s.n. from Guayaquil illustrates this well; some leaves are entire, some have prominent lateral teeth, some are 3-lobed to over half way and some are 5-lobed almost to base, the lobes oblong to ovate.

Figures

Figure 84. Photographs of Ipomoea species. A I. batatoides B I. horsfalliae C I. mauritiana D I. exserta E, F I. platensis. A Guillaume Leotard B Royal Botanic Gardens, Kew C S. SANT / Parc Amazonien de Guyane D John Wood E, F Mario Giorgetti.