Arachnothryx pansamalana (Standl.) Borhidi

Rondeletia pansamalana Standley, sp. nov
Shrub, the branches slender, terete, strigillose when young; stipules triangular-subulate, 4-6 mm. long, erect, persistent, thick, brown, strigillose; leaves opposite, the petioles slender, 3-15 mm. long, strigillose, the blades elliptic or ovate-elliptic, 9-15 cm. long, 3-4.5 cm. wide, abruptly acute to attenuate at the base, subabruptly attenuate or long-attenuate at the apex, green above and glabrous, paler beneath, strigillose along the veins, the costa slender, prominent, the lateral veins slender, 5-10 on each side, arcuate, ascending at an angle of 45°-60°; inflorescence terminal, slender-pedunculate, the flowers short-pedicellate, in loose few-flowered pedunculate cymes, these arranged in a narrow thyrsiform panicle about 10 cm. long; bracts small, linear; hypanthium finely strigillose, pyriform-globose; calyx-lobes 4, very unequal, 3 of them small, lance-linear, attenuate, the fourth elliptic-oblong, 2.5-3 mm. long, foliaceous, green, obtuse or acutish; corolla thinly strigillose outside, the tube rather stout, 5-6 mm. long, the 4 lobes rounded, 1.5 mm. long, spreading, the throat naked; anthers and style included.
Type collected at Pansamala, Alta Verapaz, Guatemala, altitude 1140 meters, April, 1886, H. von Tuerckheim 897 (U. S. Nat. Herb. no. 49065).