Ipomoea silvicola House

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

410. Ipomoea silvicola House , Bot. Gaz 43: 411. 1907. (House 1907b: 411)

Type.

GUATEMALA. Santa Rosa , Río de Las Cañas, Heyde & Lux in Donnell Smith 4022 (holotype US00111471, isotypes BM, GH, K, NY).

Description.

Twining perennial herb, stems glabrous or puberulent. Leaves petiolate, 3-12 × 3-11 cm, broadly ovate, cordate with broad sinus, acuminate, adaxially glabrous or shortly adpressed pilose, abaxially densely adpressed pilose; petioles 1-8 cm. Inflorescence of pedunculate 2-flowered cymes, borne on short branchlets 0.5-1.5 cm long with reduced leaves; peduncles 0-4 mm, tomentose; bracteoles 5-6 mm, filiform, caducous; secondary peduncles (if present), 2-6 mm; pedicels 20-40 mm; sepals unequal, outer 30-35 × 4-5 mmlanceolate, acuminate, covered in soft spines but apically spineless, pilose throughout with white hairs, inner 20-23 × 5-6 mm, margins broad, scarious, the spines restricted to the midrib area; corolla 7-8 cm long, pink, glabrous outside, limb 4-5 cm, unlobed. Capsules and seeds not seen.

Distribution.

Woodland borders at around 1000-1500 m in Central America, apparently common in Honduras and Guatemala.

HONDURAS. Ocotepeque, A. Molina 22264 (F, MO); ibid., 22151 (BM).

GUATEMALA. Capertillo, Valle del Fuego, O. Salvin (K); Sacatepéquez, T. Croat 41947 (MO).

MEXICO. Chiapas: Solusuchiapa, D.E. Breedlove 19938 (DUKE, MO); Yajalón, Los Pinos, A. Shilom Ton 4941 (MO). Oaxaca: Santa María Chimalapa, H. Hernández 554 (MEXU, MO); Totontepec, J. Rivera Reyes 1303 (MEXU, MO). Veracruz: fide McDonald (1994). Yucatán: F.C. Cabrera 1413 (MO).

Notes.

The plate accompanying the protologue is incorrect and is of Ipomoea lozanii . The correct plate is Figure 4 , labelled Ipomoea collina .

Very similar to Ipomoea echinocalyx but differing in the more densely pubescent to subtomentose leaves, especially the whitish abaxial surface. Most distinct are the long, lanceolate finely acuminate outer sepals which can reach 35 mm in length and which are naked of spines in the upper half but are pilose throughout. The cymes are usually 2-flowered, borne on short branchlets 0.5-1.5 cm long with reduced leaves, the pilose pedicels 2-4 cm long.

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.