Monographs Details: Psychotria glandulicalyx subsp. camaniensis Steyerm.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Rubiaceae
Description:Latin Diagnosis - A subsp glandulicalyx foliorum laminis 4-5-plo longioribus quam latioribus anguste oblanceolatis vel anguste lanceolatis apice longiacuminatis basi longiacuminatis 3-5.5 × 0.6-1.3 cm recedit; floribus plerumque pedicellatis, pedicellis 2-4 mm longis; calycis tubo intus infra sinus loborum 1-glandulifera instructo; corollae tubo intus in medio tan turn pubescenti.

Discussion:

Psychotria glandulicalyx is characterized by the abundantly glandular interior of the calyx, which is minutely toothed and shallow, and by the small inflorescence and small leaves. The subsp camaniensis might at first impress one as being perhaps specifically distinct from the other subspecies and varieties of P. glandulicalyx, but the integradation which is manifest in the width of the leaf blade indicates the existence of transitional populations. For example, the collection of Steyermark & Wurdack 1095 from Chimanta Massif shows variation from leaves ovate and 2-3 times longer than broad to ones narrowly elliptic-lanceolate or even lanceolate and only 0.8-1 cm broad, and also narrowed at base and apex as in the subsp camaniensis, becoming 4 times longer than broad. Steyermark & Wurdack 578 also has mainly narrower leaf shapes than other collections from Chimanta Massif.

There also appears to be variation in the density of pubescence and its occurrence in the interior of the corolla tube. In the subsp camaniensis only the middle part of the corolla tube interior is pubescent. This likewise appears to be the case with the plants from Auyan-tepui plants. But in the collections from Chimanta Massif and Neblina the pubescence of the corolla interior is mainly scattered from the middle to the orifice, or the indument may be shorter and less abundant in the upper part of the pubescent zone. Thus, there does not appear to be stability manifest in the character of pubescence of the corolla interior. In subsp glandulicalyx var densipubens from Meseta de Jaua and Neblina the pubescence in general of stems, inflorescence, and lower midrib of leaf is longer and more hirtellous as contrasted with most of the collections from Chimanta Massif, in which the indument is mainly minute and puberulent.