Monographs Details: Adelobotrys monticola subsp. occidentalis Wurdack
Authority: Maguire, Bassett. 1969. The botany of the Guayana Highland-part VIII. Mem. New York Bot. Gard. 18: 1-290.

subsp monticola foliorum subtus pilis omnibus malpigheis differt.

Type Collection: N. T. Silva & U. Brazao 60878 (holotype N Y ; isotypes N Y , U S ) , collected near Marker BR-1 of the Comissao de Limites, Serra Pirapucu, Amazonas, Brazil, elev 1250 m , 24 Jan 1966. "Climbing epiphyte; calyx green; corolla white."

The typical subspecies, known from eastern Guayana (including Suriname) has the lower (and usually, at least in young leaves, the upper) leaf surfaces sparsely setose with simple hairs as well as the usual sparse malpighian trichomes. The essentially truncate calyx limb with infra-marginal external teeth, distant simple hairs on the leaf margins, and the bluntly and shortly lobed ascending tooth of the stamen connectives are the salient species features. The western subspecies vegetatively somewhat resembles Adelobotrys adscendens (Sw.) Triana, which however has caudateacuminate lobes on the dorsal appendage of the stamen connectives. Both subspecies have very obscure unisetose external teeth on the calyx, while A. spruceana Cogn. has rather prominent teeth projecting 1-1.5 m m beyond the calyx margin. Adelobotrys rotundifolia Triana differs at least in the denser foliar pubescence and slightly projecting cal5rx teeth; Haught 2548 (Villavicencio, Meta, Colombia) and/or Bang 1702 (Bolivia), with blunt and only slightly divided ascending appendages on the connective, m a y represent this obscure species, known only from the fruiting type collection. Steyermark 58006 (sterile) and Tate 911 (fruiting), both collections from the slopes of Cerro Duida, Amazonas, Venezuela, are probably referable to A. monticola subsp occidentalis.