Ipomoea paulistana (Silva Manso) Stellfeld

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

168. Ipomoea paulistana (Silva Manso) Stellfeld , Tribuna Farm., Curitiba 13: 86. 1945. (Stellfeld 1945: 86)

Convolvulus paulistanus Silva Manso , Enum. Subst. Braz. 17. 1836. (Manso 1836: 17).

Ipomoea echioides Choisy , Mém. Soc. Phys. Genève 8 (1): 54 [132]. 1838. (Choisy 1838: 54 [132]). Type. BRAZIL. Mato Grosso, Serra-Nov., Silva Manso & Lhotsky 32 (syntype G 00135526).

Ipomoea echioides var. villosula Meisn. in Martius et al. , Fl. Brasil. 7: 244. 1869. (Meisner 1869: 244). Type. BRAZIL. Mato Grosso, Cuaibá, L. Riedel (NY00319184, lectotype, designated here).

Ipomoea rondoniae Hoehne, Anexos Mem. Inst. Butantan , Bot. 1, fasc. 6: 68, pl. 14. 1922. (Hoehne 1922: 68). Type. BRAZIL. Mato Grosso (extreme NE), nas márgenes do Cautária Grande, Pouso Primeiro de Fevereiro na Rondônia, Kuhlmann 2265 (holotype SP000579?, isotype R).

Ipomoea rondoniae var. breviracemosa Hoehne, Anexos Mem. Inst. Butantan , Bot. 1, fasc. 6: 69, pl. 15. 1922.(Hoehne 1922: 69). Type. BRAZIL. Mato Grosso, Estrada ao Diamantina , perto de Cuaibá, Kuhlmann 2269 (holotype SP?, isotype R).

Type.

BRAZIL. Mato Grosso, Cuyaba, Silva Manso & Lhotsky 32 (G00135526, lectotype, designated by Wood et al. 2015: 74).

Description.

Erect herb to c. 0.75 cm, usually unbranched, stems pubescent, often leafless below, rootstock an elongate tuber. Leaves sessile, numerous, imbricate, 0.5-6(-13) × 0.1-0.5(-1.2) cm, diminishing in size upwards, linear-oblong, base narrowly cuneate, apex acute, mucronate, margins commonly inrolled, both surfaces densely softly pilose or pubescent. Inflorescence terminal, ± racemose in appearance, up to 30 cm long, formed of cymes, which are often reduced to solitary flowers arising in the axils of the leaf-like bracts; peduncles 0-3 cm (often absent), erect; bracteoles 3-10 mm, linear, pilose, deciduous; pedicels 2-6 mm; sepals 5-7 mm, subequal, elliptic, usually truncate, rigid, convex, the outer pubescent, acute, the inner subglabrous; corolla 5-6 cm long, pink, funnel-shaped, glabrous, limb 3-4 cm diam., weakly lobed. Capsules globose, 4-5 mm diam., glabrous, apex shortly rostrate, the dead style remaining till the fruit matures; seeds c. 3 mm, long-pilose.

Distribution.

A characteristic cerrado species of Bolivia and Brazil found from around 200 to 900 m.

BRAZIL Goiás: Mun. Corumbá, A. Macedo 4476 (K); Colinas, A.A. Arbo et al. 3679 (K, CTES); Chapada de Veadeiros, J.R. Pirani et al. 1828 (SPF, K). Maranhão: Carolina, M.F. da Silva 1090 (NY). Mato Grosso: 270 km N. of Xavantina, D.R. Gifford 98 (K); Philcox & Ferreira 4403 (K), 4530, (K), J. Ratter et al. 857 (K); Cuiabá, Malme 1288 (S); Río Yocuara, C.A.M. Lindman 3113 (S). Minas Gerais: Morro do Cachorro, A. Krapovickas & C. Cristóbal 33460 (CTES). Tocantins: R.D. Reeves 2890 (CEN); Guaraí, H. S, Irwin 21518 (NY). Also Mato Grosso do Sul, fide Flora do Brasil (2020).

BOLIVIA. Beni: Vaca Díaz, Pampas de San Lorenzo, P. Maas et al. 8722 (NY, MO). Santa Cruz: Serranía de Santiago de Chiquitos, J.R.I. Wood & D. J. Goyder 16968 (K, LPB, USZ); J.R.I. Wood 18824 (K, LPB); Velasco, P.N. Noel Kempff Mercado, L. Sánchez et al. 253 (ARIZ, FTG, MO); J.R.I. Wood et al. 18213 (K, LPB); Hac. Acuario, R. Guillén et al. 309 (ARIZ, FTG, OXF, MO).

Typification.

In designating a lectotype of Ipomoea echioides var. villosula , we have chosen the NY specimen as it appears to have a label in Meisner’s handwriting annotated as "β villosula nob.".

Note.

Very distinctive because of its imbricate leaves which diminish in size upwards. It is occasionally confused with Ipomoea argentea but the leaves are never silvery-tomentose as in that species.