Monographs Details:
Authority:
Maguire, Bassett. 1978. The botany of the Guayana Highland--part X. Mem. New York Bot. Gard. 29: 1-288.
Maguire, Bassett. 1978. The botany of the Guayana Highland--part X. Mem. New York Bot. Gard. 29: 1-288.
Family:
Ericaceae
Ericaceae
Description:
Latin Diagnosis - Frutex; fohis petiolatis, petiolis 3-4 mm longis glabris; laminis coriaceis ovatis vel elliptico-ovatis apice abrupte longe acuminatis, acumine obtuso 3-12 mm longo, basi rotundatis vel obtusis 4.5-6.5 x 2-3.7 cmutrinque glabris, costa media subtus elevata supra sulcata, nervis lateralibus utroque latere 6-7 supra impressis prominuhsque subtus obsolescentibus paribus infimis exceptis, venuHs tertiariis supra paullo prominulis laxe reticulatisque subtus immersis obscuris; inflorscentia axillari, floribus solitariis; pedicellis 12-15 mm longis glabris; bracteolis duobus prope basin vel supra basin 2-3 mm suboppositis suborbicularibus rotundatis 0.8-0.9 x 1 mm extus glabris, marginibus ciliolato-glandulosis; calyce late campanulato apice truncato utrinque glabro, tubo 3 x 5.5-6 mm; corolia 23 mm longa basi 9 mm lato superne 5 mm lato glabro, lobis suborbiculari-ovatis rotundatis 2.5 x 2.5 mm; staminibus pauho inaequalibus; antheris alternatim 6.5 et 7.5 mm longis, thecis 3.5-4 mm longis granulosis, tubulis 3 mm longis apice rotundatis per poros oblique eUipticos 1.5-2.5 mm longos dehiscentibus, filamentis liberis ligulatis alternatim 5 mm et 6 mm longis glabris; fructu 1 cm diam.
Latin Diagnosis - Frutex; fohis petiolatis, petiolis 3-4 mm longis glabris; laminis coriaceis ovatis vel elliptico-ovatis apice abrupte longe acuminatis, acumine obtuso 3-12 mm longo, basi rotundatis vel obtusis 4.5-6.5 x 2-3.7 cmutrinque glabris, costa media subtus elevata supra sulcata, nervis lateralibus utroque latere 6-7 supra impressis prominuhsque subtus obsolescentibus paribus infimis exceptis, venuHs tertiariis supra paullo prominulis laxe reticulatisque subtus immersis obscuris; inflorscentia axillari, floribus solitariis; pedicellis 12-15 mm longis glabris; bracteolis duobus prope basin vel supra basin 2-3 mm suboppositis suborbicularibus rotundatis 0.8-0.9 x 1 mm extus glabris, marginibus ciliolato-glandulosis; calyce late campanulato apice truncato utrinque glabro, tubo 3 x 5.5-6 mm; corolia 23 mm longa basi 9 mm lato superne 5 mm lato glabro, lobis suborbiculari-ovatis rotundatis 2.5 x 2.5 mm; staminibus pauho inaequalibus; antheris alternatim 6.5 et 7.5 mm longis, thecis 3.5-4 mm longis granulosis, tubulis 3 mm longis apice rotundatis per poros oblique eUipticos 1.5-2.5 mm longos dehiscentibus, filamentis liberis ligulatis alternatim 5 mm et 6 mm longis glabris; fructu 1 cm diam.
Discussion:
Type. GUYANA. Merume Mountains, Upper Mazaruni River Basin, first falls of Partang River, about 6 mi above mouth, 520 m alt, 12 Jul 1960, Tillett, Tillett & Boyan 44867 (holotype NY). Paratype. GUYANA. Merume Mountains, Upper Mazaruni River Basin, edge of river, 2nd falls of Partang River, about 12 mi above mouth, 580 m alt, 23 Jun 1960, Tillett, Tillett & Boyan 43906. This taxon differs from O. apophysata in the longer pores of the anthers, larger anther sacs and tubules, and larger calyx with little or no indication of an apophysate base.
Type. GUYANA. Merume Mountains, Upper Mazaruni River Basin, first falls of Partang River, about 6 mi above mouth, 520 m alt, 12 Jul 1960, Tillett, Tillett & Boyan 44867 (holotype NY). Paratype. GUYANA. Merume Mountains, Upper Mazaruni River Basin, edge of river, 2nd falls of Partang River, about 12 mi above mouth, 580 m alt, 23 Jun 1960, Tillett, Tillett & Boyan 43906. This taxon differs from O. apophysata in the longer pores of the anthers, larger anther sacs and tubules, and larger calyx with little or no indication of an apophysate base.