Ipomoea tubulata Sesse & Mocino

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

293. Ipomoea tubulata Sesse & Mocino , Flora Mexicana 42 (Naturaleza (Mexico City) ser. 2, 2, append.: 42. 1893 ( Sessé y Lacasta and Moçiño 1891-97: 39)

Quamoclit tubulosa M. Martens & Galeotti , Bull. Acad. Roy. Sci. Bruxelles 12: 270. 1845. (Martens and Galeotti 1845: 270). Type. MEXICO. Michoacán, Uruapan, H. Galeotti 1393 (holotype BR, isotypes BR, G, P, W).

Ipomoea tubulosa (M. Martens & Galeotti) Hemsl., Biol. Cent.-Amer., Bot. 2: 395. 1882. (Hemsley 1882: 395), non Ipomoea tubulosa Willd. ex Roem. & Schult. (1819) .

Exogonium uhdeanum Fenzl. ex Hallier f., Bot. Jahrb. Syst. 16: 559. 1894 [pub.1893]. (Hallier 1893a: 559), nom. nud.

Ipomoea uhdeana (Hallier f.) D.F. Austin, Ann. Missouri Bot. Gard. 64: 332. 1977 [pub. 1978]. (Austin 1978a: 332), basionym illeg.

Ipomoea urbinei House , Muhlenbergia 3 (3): 41. 1907. (House 1907a: 41). Type. MEXICO. Jalisco, Vulcan de Colima, Barcéna 214 (holotype MEXU†, lectotype, icon of Barcéna 214 in House 1907a: t.2, f.2, designated by McDonald 1987c: 51).

Exogonium woronovii Standl., Publ. Field Mus. Nat. Hist. , Bot. Ser. 11: 171. 1932. (Standley 1932: 171). Type. MEXICO. Michoacán, Rodillo del Diablo near Uruapan, G. Woronow 2906 (holotype F641479).

Ipomoea shinnersii var. woronovii (Standl.) D.F. Austin , Ann. Missouri Bot. Gard. 64: 337. 1977 [pub. 1978]. (Austin 1978a: 337).

Ipomoea woronovii (Standl.) D.F. Austin , Taxon 32: 626. 1983. (Austin 1983: 626).

Type.

MEXICO. [ Michoacán], Uruapan, Sessé & Moçiño 463 (lectotype MA603821, designated here).

Description.

Perennial herb to 2 m, stems glabrous or pubescent, often reddish. Leaves petiolate, 3.5-7 × 3-5.5 cm, ovate, finely acuminate and mucronate, base cordate with rounded auricles, sometimes concealing petiole, adaxially glabrous to thinly pubescent, abaxially paler, minutely pubescent; petioles 1-3 cm, glabrous or pubescent. Inflorescence of usually 1-3-flowered, pedunculate axillary cymes; peduncles 1.4-3.5 cm, glabrous or puberulent; bracteoles 4-5 × 2 mm, oblong-elliptic; secondary peduncles, if present, much shorter than pedicels; pedicels 5-9 mm, glabrous or puberulent; sepals unequal, glabrous with scarious margins, outer 3-4 × 2 mm, ovate-deltoid, acute to obtuse, minutely mucronate, inner 7-9 × 3-4 mm, obtuse to emarginate and mucronate; corolla 3-4.5 cm long, hypocrateriform, red, glabrous, limb c. 1.5 cm diam., deeply lobed, the lobes deltoid, acute, 5-7 mm long, stamens weakly exserted. Capsules 11-12 mm, conical; seeds 6-10 mm, dark brown, puberulent.

Illustration.

McDonald (1987c: 80).

Distribution.

Mexico. Moist hill forest around 1600-2000 m, many records are from around Uruapan.

MEXICO. Sine loc., Schiede s.n. (K). Jalisco: Tuxpan, J. Villa & J. Chávez 572 (IEB, MICH). Michoacán: Coalcomán, Zarzamora, G.B. Hinton 12254 (K, NY, TEX, US); 2.5 km N. de Zirimicuaro, Mun. Ziracuaretiro, S. Zamudio 11263 (FTG, IEB); Tepelcatepec to Coalcomán, V.W. Steinmann et al. 5603 (ARIZ); Puerto de Las Cruces, J. C. Soto Nuñez 10987 (MEXU).

Typification.

Although McVaugh (2000: 200) indicated that Ipomoea tubulata Sesse & Mocino was the oldest available name for this species, it has been ignored until now. We have designated MA603821 as lectotype as it is a good specimen with the original name annotated on the sheet.

Note.

A little-known species somewhat similar to Ipomoea dumosa in habit, corolla shape and colour. It differs in the relatively long pedicels and the lobed corolla with short triangular lobes, a character which also serves to separate it from I. electrina . The stamens are weakly exserted and the cymes 1-3-flowered.