Monographs Details: Pagamea capitata subsp. thibaudiifolia (Wernham) Steyerm.
Authority: Maguire, Bassett. 1965. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 12 (3): 1-285.
Family:Rubiaceae
Description:Distribution and Ecology - Distribution. White sand savannas and scrub forest at low elevations above sea level, Suriname and British Guiana. SURINAME. Ilostmann 801 (lectotype of Cephaelis thihaueliaefolia); Jodensavanna, near ruin, Lanjouw & Lindeman 2979. BRITISH GUIANA. Wariim-Ituni, along the Berbice-Rupununi Cattle trail, Abraham 126; 3 miles E of Atkinson Field, Irwin 395; savannas, E of Ituni, 35 miles S of Mackenzie, Cowan 39253; Upper Mazaruni River Long about 60° 10' W , Dc La Cruz 2214; Kamakusa, Upper Mazaruni River, Long. about 59° 50' W , Dc La Cruz 2862; Malali, Demerara River, Lat. about 5° 35' N, De La Cruz 2659; Atkinson Field, Harrison 1737.

Discussion:An examination of the two specimens {Ilostmann 801 and Jenman 867) upon which Wernham based his description of Cephaelis thibaudiaefolia, examined through the kind courtesy extended by the Director of Kew Herbarium, reveal that actually two taxa are represented as variations of the Pagamea capiteita complex. The Hostmann 801, selected as the lectotype in the present treatment, represents the part of the description by Wernham pertaining to leaf-blades "lanceolatis" and ''basi brevissime acuminatis"; it represents the variation encountered on the "muri" sands and scrub growth of loAvland altitudes in British Guiana and Suriname [i.e., P. capiteita subsp. thibenidiaefola]. On the other hand, the Jenman 867 specimen from Potaro River, Kaieteur Savannah, represents that part of the description by Wernham pertaining to leaf-blades "ovatis" and "basi subrotundatis" and represents Bentham's typical Pagamea capitata [subsp. capiteita] of the savannas of the higher altitudes (Tafelberg of Surinam, Kaieteur Plateau of British Guiana, and Gran Sabana, Venezuela).
Distribution:Suriname South America| Guyana South America|