Nautilocalyx cordatus

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Nautilocalyx cordatus


Terrestrial herb, <10 cm tall. Stem sappy, creeping, hirsute at apex, glabrescent below. Leaves subequal to strongly unequal in a pair; petiole 0.7-13 cm long, more or less hirsute; blade chartaceous when dry, often obliquely oblong-elliptic, variable in shape and size, blade of the larger leaf in a pair 2-15 x 1.3-8 cm, margin irregularly crenate-serrate (larger leaves often bicrenate), apex acute, obtuse or rounded, base subcordate or rounded, above hirsute, below hirsute, especially on veins. Flowers 2-6, in epedunculate fascicles; pedicel 1-5 cm long, hirsute. Calyx green or purplish, lobes free, 4erect, subequal, lanceolate, 0.6-1.5 x 0.12-0.5 cm, margin serrate, apex acuminate, outside and inside hirsute, dorsal one curved around spur, somewhat shorter and narrower; corolla oblique in calyx, white outside, inside whitish with lavender lobes, 4.7-7 cm long, tube trumpet-shaped, 3.3-5 cm long, base spurred, 0.25-0.5 cm wide, middle dorsally slightly ventricose, slightly bent downwards, throat contracted, 1-1.5 cm wide, outside villous, inside glabrous, limb 1.5-4.2 cm wide, lobes subequal, spreading, rounded, 0.6-1.7 x 0.6-1.7 cm, margin crenate-serrate; stamens included, inserted on base of corolla; ovary ovoid, 0.3-0.4 x 0.15-0.2 cm, softly hirsute, style ca. 3 cm long, glabrous or nearly so, stigma obscurely 2-lobed. Mature capsule light brown, globose, 0.7-0.8 x 0.7-0.8 cm.


Amaprá present, Guyana present, Parrá present, Southern America: Brazil North (Amazonas present, Roraima present); Venezuela (Venezuela present), Suriname present, northern Brazil present
Venezuela, Guyana, Suriname, and northern Brazil (Amaprá, Amazonas, Parrá, Roraima); 55 collections studied (GU: 40; SU: 5).


Collected in flower , 1 collection recorded in fruit, in .