Pagamea uniflora Steyerm.

• Authority

  Maguire, Bassett. 1965. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 12 (3): 1-285.

• Family

  Rubiaceae

• Scientific Name

  Pagamea uniflora Steyerm.

• Type

  Type. Shrub 3-4 m tall; corolla white; leaves erect, coriaceous, deep green and shining above, pale green below; Bonnetia forest, northwestern part of summit of Abacapa-tepui, Chimanta Massif, Estado Bolivar, Venezuela, at alt. 2125- 2300 m, 13 Apr 1953, Julian A. Steyermark 74877.

• Description

  Latin Diagnosis - Frutex 3-4-metralis, ramis terminalibus vel juvenilibus minute denseque puberulentibus; stipularum vaginis 3.5 mm longis minute puberulentibus apice 4-8 dentibus inaequalibus lateralibus brevioribus 0.5-1.5 mm longis inferne pubescentibus instructis; foliis petiolatis, petiolis 3-4.5 mm longis utrinque minute puberulentibus; laminis oblanceolatis vel oblanceolato-ellipticis revolutis apice aeutis vel acutate obtusis 1.5-2.5 cm longis 0.5-1 cm latis, supra glabris costa media sulcata, subtus costa media minute puberulenti atciue axillis nervorum lateralium plerumque 2 barbatis ceterum glabris, marginibus dense hispidulociliolatis; nervis lateralibus obsoletis vel nullis; inflorescentia uniflora, pedunculo in anthesi 3-4 mm longo in fructu 5-8 mm longo minute hispidulo-pulverulenti; floris bractea ovata carinata 1 mm longa ciliolata; calyce turbinato-subcylindrico 4-5 mm longo apice 3 mm lato basi 1 mm lato inferne carinato extus glabro, lobis 4 inaequalibus ovatis vel ovato-lanceolatis subacutis vel acutate obtusis 0.5-2.25 mm longis 0.5-1 mm latis intus glabris marginibus ciliolatis; corolla breviter hypocrateriformi vel subrotata 5.75 mm longa, tubo 2.25 mm longo basi 1.5 mm lato fauce 2 mm lato, extus glabro intus fauce villosulo ceterum glabro, lobis 4 anguste lineari-oblongis apice obtusis cum appendice supra medium leviter puberulis; antheris 4 paullo exsertis 0.7-0.8 mm longis, filamentis 0.5 mm longis glabris; ovario glabro; stylo 3 mm longo glabro, stigmatibus rhomboideo-obovoideis apice rotundatis 0.75 mm longis; fructu obovoideo rubro 7-8 mm longo 4-5 mm lato.

• Discussion

  This species is noteworthy for its solitary corolla, corolla-tube longer than in most of the species of its alliance, and the two tufts of axillary hairs along the midrib of the lower leaf surface.