Ipomoea haenkeana Choisy in A.P. de Candolle

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

40. Ipomoea haenkeana Choisy in A.P. de Candolle , Prodr. 9: 358. 1845. (Choisy 1845: 358)

Type.

BOLIVIA. “Cochabamba”, T. Haenke (lectotype BR006973261, designated here; isolectotype BR).

Description.

Erect perennial to 2 m, branched towards the apex, stems woody, tomentellous. Leaves subsessile, mostly 3-6 × 2-4 cm, oblong-obovate, apex rounded and apiculate, base rounded to truncate, slightly asymmetric, adaxially dark green and thinly pilose to subglabrous, abaxially grey-tomentose; petioles 0-4 mm. Inflorescence of shortly pedunculate cymes from the uppermost leaf axils forming a terminal panicle of raceme-like branches; peduncles 1-3 cm; bracteoles 9-12 × 1-2 mm, lanceolate, acute, ± persistent; pedicels 2-5 mm (so cymes very dense); sepals subequal, 7-9 × 3-4 mm, oblong-ovate, acuminate to shortly apiculate, grey-sericeous; corolla 3.5-4 cm long, funnel-shaped, pale pink with a darker centre, pubescent outside, the limb 2.5-3.5 cm diam. Capsules and seeds not known.

Illustration.

Figure 17A ; Wood et al. (2015: 40, photo).

Distribution.

Locally common in cerrados in Santa Cruz Department in Bolivia and adjacent areas of Mato Grosso extending sporadically eastwards to Minas Gerais.

BRAZIL. Mato Grosso: Cuaibá, L. Riedel (NY); Serra de Roncador, H.S. Irwin et al. 16026 (NY); Córrego da Palha, D.L. Amaral 175 (LE, RB); Parque Estadual Cristalina, D. Sasaki 11907 (RB). Mato Grosso do Sul: G. Hatschbach 58891 (CTES, MBM, SP). Minas Gerais: Lagoa Santa, E. Warming (NY, P); Ituiutaba, A. Macedo 665 (BM, NY). São Paulo: Fazenda Campininha, O. Handro 448 (UEC).

BOLIVIA. Santa Cruz: Chiquitos, Santiago de Chiquitos, J.R.I. Wood 17972 (K, LPB, USZ); Florida, Laguna Volcánes near Bermejo, A. Fuentes 348 (LPB, NY, USZ); Guarayos, Ascensión de Guarayos, A. Krapovickas & A. Schinini 31838 (CTES, FTG); Ichilo, Buenavista, J. Steinbach 5583 (GH, LPB, NY, F); Ñuflo de Chávez, 40 km S. of Concepción, T.J. Killeen 2345 (LPB, NY, F, MO, USZ). Sara, N.of La Bélgica, M. Nee & M. Sundue 52213, (LPB, NY, USZ); Ángel Sandoval, San Matías, A. Krapovickas & A. Schinini 36185 (G, LIL); Velasco, San Ignacio hacia El Recreo, J.R.I. Wood et al. 24788 (K, LPB, UB, USZ).

Notes.

Ipomoea haenkeana is most likely to be confused with I. cuneifolia which has narrower leaves and a much shorter, more compact, unbranched terminal inflorescence.

The cited type locality of “Cochabamba” must be wrong as this is a plant of lowland cerrado vegetation, not inter-Andean dry valleys.

Figures

Figure 17. Photographs of Ipomoea species. A I. haenkeana B I. morongii C I. malvaeoides D I. hieronymi. A John Wood; B, C Tom Carruthers; D Keith Ferguson.