Ipomoea hirsutissima Gardner

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

29. Ipomoea hirsutissima Gardner , Icon. Pl. sub t. 471. 1842. (Gardner 1842a: t. 471)

Ipomoea chrysotricha Meisn. in Martius et al. , Fl. Brasil. 7: 243. 1869. (Meisner 1869: 243). Type. BRAZIL. São Paulo, "in campis R. Pardo," L. Riedel 610 (lectotype LE, sheet with Convolvulus crossed out and replaced with " Ipomoea chrysotricha Meissn. n. sp. ", designated by Wood and Scotland 2017a: 18), isolectotype NY).

Ipomoea chrysotricha Meisn. var. ovata Meisn. in Martius et al. , Fl. Brasil. 7: 243. 1869. (Meisner 1869: 243). Type. BRAZIL. Serra de Christaes, J.B. Pohl s.n. (BR0000530689, possible isotype).

Ipomoea chrysotricha Meisn. var. boliviana Meisn. in Martius et al. , Fl. Brasil. 7: 243. 1869. (Meisner 1869: 243). Type. BOLIVIA. Santiago de Chiquitos, A. D’Orbigny 928 (lectotype P03878901, designated by Wood et al. 2015: 38).

Ipomoea punicea var. rariflora Meisn. in Martius et al. , Fl. Brasil. 7: 242. 1869. (Meisner 1869: 242). Type. BRAZIL. Minas Gerais, L. Riedel s.n. (lectotype LE01025979, designated here).

Ipomoea hirsutissima var. integrifolia Chodat & Hassl. , Bull. Herb. Boiss. Ser. 2: 5: 688. 1905. (Chodat and Hassler 1905: 688). Type. PARAGUAY. Canindeyú, Ipe Hú, Sierra de Maracayú, E. Hassler 5007 (lectotype G00174906, designated by Wood and Scotland 2017a: 18, isolectotypes F, G, K, P, S, UC).

Ipomoea hirsutissima var. repens Glaz. Bull. Soc. Bot. France 57, mém. 3e: 481. 1910. (Glaziou 1910: 481). Type. BRAZIL. A.F.M. Glaziou 21791 (holotype P03536444, isotypes BR, G, K).

Type.

BRAZIL. Goiás, Mision of Duro, Oct. 1839, G. Gardner 3355 (lectotype K000612806, designated by Wood and Scotland 2017a: 18, isolectotypes BM, F, GH, K, NY, P, SP).

Description.

Erect herb to about 40 cm with a large woody tuberous root, the whole plant densely pilose with rather stiff white hairs swollen at the base. Leaves subsessile, 3-8 × 1-3.5 cm, oblong-obcuneate, obtuse, base cuneate, both surfaces pilose, green; petioles 0-2 mm. Inflorescence of solitary (rarely paired), pedunculate axillary flowers arising from the upper leaf axils; peduncles 1-4 cm; bracteoles 10-25 × 1-1.5 mm, linear-lanceolate, finely acuminate, caducous; pedicels 3-6 mm; sepals slightly unequal, narrowly ovate, acuminate, pilose, 13-16 × 4 mm, inner sepals similar but with broad, glabrous margins; corolla 6-7 cm long, funnel-shaped, gradually widened from base, pink, pilose, the hairs with dark bases, limb c. 5 cm diam., shallowly lobed. Capsules 12 × 5 mm, narrowly ovoid, glabrous; seeds 7 × 2-3 mm, dark brown, glabrous except for shortly pilose angles.

Illustration.

Figures 4D , 25 ; Wood et al. (2015: 40).

Distribution.

Widely distributed in the cerrados of Brazil, Paraguay and Bolivia but nowhere very frequent.

PARAGUAY. Alto Paraná: G. Caballero s.n. (G). Canindeyú: type of Ipomoea hirsutissima var. integrifolia .

BRAZIL. Dist. Fed.: Brasilia, E. Pereira 4854 (RB). Goiás: A.F.M. Glaziou 21791a (K); Serra dos Pireneus, H.S. Irwin et al. 10815 (MO, NY); Alto Paraíso, da Silva et al. 2428 (IBGE, K); c. 5 km de Niquelândia, M.L. Fonseca et al. 1234 (IBGE, K); Mimosa de Goiás, M. Mendoza 4365 (CEN); Minacú, B.M.T. Walter 793 (CEN); Mun. Água Fria, G. Hatschbach et al. 58314 (MBM). Mato Grosso do Sul: A. Pott 15189 (UFMA). Minas Gerais: Serra da Anta, c. 2 km N of Paracatú, H.S. Irwin 26055 (NY). Pernambuco: Petrolândia, E.P. Heringer et al. 12822 (NY). São Paulo: type of Ipomoea chrysotricha .

BOLIVIA. Santa Cruz: Santiago de Chiquitos, J.R.I. Wood & E. Guzmán 17405 (K, LPB, USZ); Germán Busch, Cerro Mutún, I.G. Vargas et al. 3240 (F, NY).

Note.

A very distinct species because of its erect habit, subsessile leaves and stiff spreading hairs, which cover almost all parts of the plant including the corolla.

Figures

Figure 4. Sepals of Ipomoea species. A I. racemosa B I. rosea C I. alba D I. hirsutissima E I. barbatisepala F I. ampullacea G I. gigantea H I. longeramosa. Photographs of A (R. A. & E. S. Howard 8863) E (Gonzalez Ortega 874) and F (Lott & Wendt 2192) by John Wood; B (Harley et al. 54830); C (Fendler 589) and H (Pickersgill et al. RU 72 - 400) by John Baker; D (Mendoza 4365) and G (Mendoza 4645) by Moises Mendoza.

Figure 25. Ipomoea hirsutissima. A habit (lower stem) B habit (stem apex) C stem base D stem indumentum E outer sepals F middle sepal G inner sepals H corolla opened out J ovary and style. Drawn by Rosemary Wise from Wood & Guzman 17405.