Ipomoea aurifolia Dammer

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

30. Ipomoea aurifolia Dammer , Bot. Jahrb. 23, Beibl. 57: 39. 1897. (Dammer 1897: 39)

Ipomoea stenophylla var. aurifolia (Dammer) Hallier f., Jahrb. Hamburg. Wiss. Anst. 16, beiheft 3: 54. 1899. (Hallier 1899a: 54).

Type.

BRAZIL. Goiás, Rasgão, Corumbá [de Goiás], A.F.M. Glaziou 21798 (holotype B†, photo F, isotypes BR, G, R).

Description.

Erect, usually branched perennial from woody xylopodium 20-40 cm high, stem asperous-pilose especially when young. Leaves subsessile, 3-6.5 × 0.5-2 cm, lanceolate to narrowly oblong-ovate, obtuse and mucronate, cuneate at base, densely adpressed asperous pilose on both surfaces. Flowers 1-3 (often solitary) in shortly pedunculate, dense axillary cymes from the uppermost leaf axils, all parts densely hirsute; peduncles 0.5-2 cm; bracteoles linear-lanceolate, acuminate 8-20 × 2-3.5 mm, persistent; pedicels 0-2 mm; sepals subequal, 8-10 mm, ovate, obtuse, densely pilose with stiff golden hairs, inner more obtuse, the margins glabrous, scarious; corolla 5-5.5 cm long, funnel-shaped, pink, densely stiffly adpressed pilose; limb c. 2.5 cm diam. Capsules and seeds not seen.

Illustration.

Figure 26 .

Distribution.

Endemic to Brazil, growing in cerrado in and around the Distrito Federal and neighbouring parts of Goiás.

BRAZIL. Dist. Fed./ Goiás: 12 km E of Brazlândia on road to Brasilia, 1225 m, 22 Nov. 1965, H.S. Irwin et al.10585 (NY, MO); Pereira 861 (RB); Luzuânia, E.P. Heringer 14887 (UB); IBGE Reserva Ecológica, E.P. Heringer et al. 5912 (IBGE, K); Faz. Água Limpa, G. Kirkbride 1573 (F).

Note.

Similar in general facies to Ipomoea hirsutissima with which it may intergrade but often more slender in habit, the indumentum appressed, rather than spreading, leaves lanceolate, flowers mostly in the uppermost leaf axils the sepals rounded to obtuse (never acuminate to a fine point) and densely covered in golden hairs.

Figures

Figure 26. Ipomoea aurifolia. A habit with xylopodium B habit and inflorescence C abaxial leaf surface D bracteole E outer sepal F middle sepal G inner sepal. Drawn by Rosemary Wise from Heringer et al. 5912.