Taxon Details: Plutarchia angulata A.C.Sm.
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Narratives:
Family:
Ericaceae (Magnoliophyta)
Ericaceae (Magnoliophyta)
Scientific Name:
Plutarchia angulata A.C.Sm.
Plutarchia angulata A.C.Sm.
Primary Citation:
J. Arnold Arbor. 24: 466. 1943
J. Arnold Arbor. 24: 466. 1943
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Description:
Description: Terrestrial shrub; stem terete, striate, ribbed, glabrous; bark grayish, exfoliating in thin strips; twigs subterete, bluntly angled, striate, densely short-pilose with white hairs. Leaves subopposite, coriaceous, ± clasping, broadly ovate to suborbicular, 1.5-3.6 x 1.6-4 cm, base truncate to rounded, cordate, apex obtuse or rounded, rarely slightly retuse, glabrous but glandular-fimbriate beneath; 5(-9)-plinerved, midrib and lateral nerves (except outer pair) slightly impressed above, obscure and raised beneath, reticulate veinlets obscure above and slightly raised to obscure beneath; petiole inconspicuous, complanate, flat above, rugose, 1-3 mm long, glabrous or pilose with white hairs. Inflorescence axillary, short-racemose, sometimes two separate rachises per axis, 2-5-flowered, flowers in pairs along rachis; rachis subterete, strongly angled, rugose, ca. 4-5 mm long, densely strigose to short-pilose with white or cinereous hairs; floral bract ovate to linear-narrowly ovate, acute, 1.6-6 mm long, densely strigose to short-pilose; pedicel subterete, ribbed, 8-32 mm long, moderately short-pilose with white hairs; bracteoles near base of pedicel, ovate, acuminate, 1.5-3 mm long, short-pilose. Flowers 4-merous, with calyx 12-21 mm long, essentially glabrous or weakly ciliate along wing edges and lobes; hypanthium obconic, winged from base to sinuses, rugose, striate, 4-9 mm long; limb erect to spreading, 8-12 mm long; lobes triangular, acuminate, 5-10 mm long, tips pilose; sinuses acute; corolla tubular, terete or 4-angled, 17-25 mm long, white, densely tomentose without with white hairs, the lobes oblong-deltate, subacute, ca. 2 mm long; stamen 8, ca. 15-18 mm long; filaments 2-3 mm long, glabrous; anthers 12-17 mm long; thecae 4-7 mm long; tubules distinct to base, 7-10 mm long, dehiscing through clefts ca. 3 mm long; style equalling corolla. Berry immature.
Distribution: Extreme S Colombia and N Ecuador; montane cloud forest, subpáramo to páramo, at 2600-3250 m altitude. Rare.
Type: Colombia. Putumayo: Río Putumayo, between El Encano and Sibundoy, Páramo de San Antonio del Bordoncillo, 3250 m, 4 Jan 1941 (fl), Cuatrecasas 11733 (holotype, US; isotype, COL).
Description: Terrestrial shrub; stem terete, striate, ribbed, glabrous; bark grayish, exfoliating in thin strips; twigs subterete, bluntly angled, striate, densely short-pilose with white hairs. Leaves subopposite, coriaceous, ± clasping, broadly ovate to suborbicular, 1.5-3.6 x 1.6-4 cm, base truncate to rounded, cordate, apex obtuse or rounded, rarely slightly retuse, glabrous but glandular-fimbriate beneath; 5(-9)-plinerved, midrib and lateral nerves (except outer pair) slightly impressed above, obscure and raised beneath, reticulate veinlets obscure above and slightly raised to obscure beneath; petiole inconspicuous, complanate, flat above, rugose, 1-3 mm long, glabrous or pilose with white hairs. Inflorescence axillary, short-racemose, sometimes two separate rachises per axis, 2-5-flowered, flowers in pairs along rachis; rachis subterete, strongly angled, rugose, ca. 4-5 mm long, densely strigose to short-pilose with white or cinereous hairs; floral bract ovate to linear-narrowly ovate, acute, 1.6-6 mm long, densely strigose to short-pilose; pedicel subterete, ribbed, 8-32 mm long, moderately short-pilose with white hairs; bracteoles near base of pedicel, ovate, acuminate, 1.5-3 mm long, short-pilose. Flowers 4-merous, with calyx 12-21 mm long, essentially glabrous or weakly ciliate along wing edges and lobes; hypanthium obconic, winged from base to sinuses, rugose, striate, 4-9 mm long; limb erect to spreading, 8-12 mm long; lobes triangular, acuminate, 5-10 mm long, tips pilose; sinuses acute; corolla tubular, terete or 4-angled, 17-25 mm long, white, densely tomentose without with white hairs, the lobes oblong-deltate, subacute, ca. 2 mm long; stamen 8, ca. 15-18 mm long; filaments 2-3 mm long, glabrous; anthers 12-17 mm long; thecae 4-7 mm long; tubules distinct to base, 7-10 mm long, dehiscing through clefts ca. 3 mm long; style equalling corolla. Berry immature.
Distribution: Extreme S Colombia and N Ecuador; montane cloud forest, subpáramo to páramo, at 2600-3250 m altitude. Rare.
Type: Colombia. Putumayo: Río Putumayo, between El Encano and Sibundoy, Páramo de San Antonio del Bordoncillo, 3250 m, 4 Jan 1941 (fl), Cuatrecasas 11733 (holotype, US; isotype, COL).
Flora and Monograph Treatment(s):
Plutarchia angulata A.C.Sm.: [Article] 1943. J. Arnold Arbor. 24: 466.
Plutarchia angulata A.C.Sm.: [Article] 1943. J. Arnold Arbor. 24: 466.