Monographs Details: Palicourea rigida subsp. rigida f. microphylla 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 rigida et ceteris taxis foliis minoribus 6-8 × 2.5-2.8 cm oblanceolatis vel elliptico-oblanceolatis apice subobtusis basi acutis utrinque glabris recedit; pedunculo 10-11 cm longo glabro; inflorescentia dense oblongo-thyrsoidea 6 × 2.5-3 cm, ramis inferioribus medianisque 1.5-2 cm longis.

Discussion:

The Bolivian collection was published as a nomen nudum by Herzog in Meded. Ryks. Herb. 46: 26. 1922, since he does not describe his collection but merely cites the words “Bl. goldgelb” and “strauch” as the descriptive part of his herbarium label.

This form has much smaller and narrower leaves, and much shorter inflorescences than P. rigida subsp rigida f angustior Chod. & Hassl., described originally from Paraguay, but occurring within the range of the species in Venezuela, Bolivia, Brazil, and elsewhere.