Monographs Details: Posoqueria trinitatis DC.
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Family:Rubiaceae
Description:Distribution and Ecology - Trinidad and the Guianas. TRINIDAD. 12¼ mile Toca Road, Salibya, P. O. Williams 12886, York, House Gardens, Mc Lean s.n.:Botanical Garden, Broadway s.n.; Port-of-Spain, Mell s.n. BRITISH GUIANA. Tinamu Falls, Cuyuni River, Bartlett 8409; Jenman 4917; Mora Landing, Monika River, Pomeroon District, De La Cruz 969; Moruca River, Jenman 7884; Upper Rupu-nuni River, near Dadanawa, lat 2°45'N, De La Cruz 1550; Wanama River, Northwest District, lat 7°45'N, long 60°15'W, De La Cruz 4058; Waramuri Mission, Moruka River, Pomeroon District, De La Cruz 2497; Penal Settlement, Hitchcock 17090; Assakatta, Northwest District, lat 7°45'N, long 59°5'W, De La Cruz 4345; Waini River, Northwest District, lat 8°20/N, long 59°40'W, De La Cruz 3766; Massaruni, Bartlett s.n.; above San Victor, Amacuro River, Northwest District, Anderson 47; Mazaruni Station, Field Vo. Fanshawe 6O4. SURINAME. Paramaribo, Wullschlagel 2551, Hostniann A' Kappler 699; regioni-bus int( lioribus ad Juden-Savanne, A. Kappler 1723 (type of Posoqueria intermedia). FRENCH GUIANA. Maroni, Melinon 55.

Discussion:

Posoqueria intermedia Miq., Linnaea 19: 135. 1847.

Type. Trinidad, Sieber 215.

This species has been confused by various authors with both Posoqueria latifolia and P. longiflora. It may be distinguished at once from either of those species by the papillate-puberulent interior of the corolla-tube.

On the type specimen of P. intermedia the stamens are barely exserted, the filaments being much shorter than the anthers. This condition sometimes exists in collections in which the stamens have not completed their full development, and is well described by Hutchinson (Gard. Chron. III. 57: 306, fig. 101. 1915) in his description of P densiflora. Here he has illustrations showing earlier and later stages of the development of the stamens, and states that “the anthers are inserted at the mouth of the corolla-tube, and when the limb opens they protrude from it obliquely in the form of a cone, recalling the anthers of the Lobeliaceae. This cone, when ripe, at the slightest disturbance bursts open with considerable force.” He then describes the bending back and forth of the anthers during anthe-sis. This would account for differences in filament length shown in various collections of P. intermedia and P. trinitatis. As the interior of the corolla in the type collection of P. intermedia has basal and upper portions papillate-puberulent as in P. trinitatis, and in all other respects resembles that species, it is evident that this is conspecific with P. trinitatis.

Distribution:Trinidad and Tobago South America| Guyana South America| French Guiana South America| Suriname South America|