Monographs Details: Psychotria boliviana Standl.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Rubiaceae
Description:Distribution and Ecology - Distribution. Amazonian Bolivia, Brazil, Colombia, and southern Venezuela. BOLIVIA. San Carlos, Buchtien 1478, 1502; Mapiri, Buchtien 1473; Rusby 1883; Tipuani to Guanai, Bang 1693. BRAZIL. Amazonas: Parintins, 12 Dec 1935, Ducke 34998 (type collection of P. foetidiflora Standi.); camino entre Rio Tucano afluente del Rio Cauaburi y Cerro de La Neblina, alt 400 m, 18 Apr 1964, Ewel 117. COLOMBIA. Santander: Jordan, cordillera oriental, north side of Cuchillo de Los Micos, 20 km NNW of Velez, 8 km SSE of Landazuri, lat 6° 12' N, long 73° 44' W, alt 1100 m, 17-18 Apr 1944, Fosberg & Fassett 21808. VENEZUELA. Bolívar: along wooded quebrada, Gran Sabana, between waterfall at Rué-merú (tributary of Río Kukenan) and Divina Pastora on Río Kukenan, north of Santa Elena, south of Mount Roraima, alt 1065 m, 3 Oct 1944, Steyermark 59227 (type collection of P. kukenanensis Steyerm.). Amazonas: along Río Yatua, below Cerro Arauicaua, on exposed igneous slopes, alt 100-150 m, 12 Apr 1970, Steyermark & Bunting 102572.

Discussion:

Psychotria foetidiflora Standi., Field Mus. Publ. Bot. 22: 20. 1940.

Psychotria kukenanensis Steyerm., Fieldiana Bot. 28: 601. 1953.

Type. San Carlos, region of Mapiri, Bolivia, alt 850 m, 3 Nov 1926, Otto Buchtien 1489.

In his original description of P. foetidiflora, Standley gives the length of the flower buds as 4-5 mm, but actually the type specimen consists of numerous flowers in full anthesis, the corollas attaining 6 mm in length. The rigid, erect, subulate stipular teeth of P. foetidiflora are 4-4.5 mm in length and match collections of P. boliviana and P. kukenanensis. The same nervation of the leaves as well as the barbate orifice of the corolla is manifest in the three taxa. It is not possible to separate P. kukenanensis from P. boliviana. The original differences, noted in the description of P. kukenanensis, that the inflorescence is more congested with only 3-5 branches, do not hold and may be explained by the earlier state of development with flowers in bud, but as the inflorescence matures, it becomes more expanded and elongated, although still retaining the characteristic glomerules of flowers of both early and mature stages of inflorescence development. Although the original description of P. kukenanensis gave nine as the number of lateral pairs of nerves of the leaf blades, 10 or 11 pairs may be found on some of the leaves of the type collection. Finally, the presumed stipular difference stated for P. kukenanensis, that the apices of the stipules are 4-setose, cannot be maintained, as in both P. boliviana and P. kukenanensis the stipular sheath is 3-4 mm long and subtruncate or rounded and terminated by a 4-toothed or lobate appendage, the teeth themselves 0.5-1 mm long. However, the length of the teeth may attain 4-4.5 mm as in the type collection of P. foetidiflora. The uppermost stipular sheath may be terminated by only one rigid awn, as in the Colombian collection of Fosberg & Fassett 21808, but the same collection has other stipules tipped by shorter tips or by more than 1 awn. The Colombian collection varies from typical P. boliviana in having branched paniculate inflorescences, longer than broad (3-3.5 × 2 cm), with the lower branches 3-4-verticillate, but probably represents a minor variation of inflorescence development. The fruits of the Ewel 117 and 118 collections are both 1- to 2-seeded and bridge the differences in part existing between Coussarea and Psychotria. The Ewel 118 collection was previously cited as Coussarea leptophragma (Mem. N. Y. Bot. Gard. 17: 370. 1967).

Distribution:Bolivia South America| Brazil South America| Colombia South America| Venezuela South America|