Mirabilis pringlei Weatherby

Mirabilis pringlei Weatherby, Proc. Am. Acad. 45: 424. 1910
Plants erect, about 1 meter high, much branched, the branches slender, finely viscidpuberulent; petioles slender, 3-15 mm. long; leaf-blades suborbicular to rounded-deltoid or deltoid-ovate, 3.5-10 cm. long, 2-9 cm. wide, unequally subcordate at the base, acute to attenuate at the apex, thin, bright-green, glabrous, ciliolate; inflorescence of terminal manyflowered cymes, bracteate, the bracts minute; peduncles 1-6 mm. long, densely shortvillous ; ' involucre campanulate, 5-8 mm. long, glandular-puberulent, the lobes as long as the tube, oval-ovate, acute or obtuse; perianth tubular, 2.5—3 cm. long, sparsely glandular-puberulent, white tinged with pink, 4-5 mm. in diameter, slightly dilated below, the shallowly 5-lobed limb scarcely broader than the tube; stamens 5, the filaments nearly twice as long as the perianth, much coiled and twisted; fruit broadly obovoid, 6-7 mm. long, 4-5 mm. in diameter, constricted at both ends, sharply 5 -angled, slightly tuberculate, dark-brown, glabrous.
Type locality : Under limestone cliffs, Iguala Canyon, Guerrero, at an altitude of 915 meters. Distribution: Known only from the type locality.