Arachnothryx heteranthera (Brandegee) Borhidi

Rondeletia heteranthera Brand. Univ. Calif. Publ. Bot. 4: 387
1913.
Shrub, the branches slender, terete, grayish, strigillose when young but soon glabrate; stipules triangular, 2-3 mm. long, acuminate, erect, subpersistent, thick, brown, strigillose or glabrate; leaves opposite, the petioles stout, 3-5 mm. long, minutely strigillose or glabrate, the blades ovate, oval-elliptic, or broadly ovate, 6-10 cm. long, 2.5-4.2 cm. wide, rounded or very obtuse at the base, subabruptly acuminate to long-attenuate at the apex, glabrous or obscurely strigillose beneath along the veins, dark-green above or lustrous, slightly paler beneath, the costa slender, prominent, the lateral veins slender, 4-6 on each side, distant, arcuate, ascending at an angle of 45°-60°; inflorescence terminal and axillary, the flowers short-pedicellate, in few-flowered cymes, these short-pedunculate, arranged in narrow thyrsiform panicles 2-4 cm. long; bracts very small, linear; hypanthium strigillose, subglobose; calyx-lobes 4, triangular, unequal, 0.5 mm. long, acute, erect, shorter than the hypanthium; corolla minutely strigillose outside, the tube stout, 2.5-3 mm. long, naked in the throat, the 4 lobes rounded, about 1 mm. long.
Type locality: Bafios del Carrizal, Veracruz. Distribution: Known only from the type locality.