Monographs Details:
Authority:
Pedraza-Peñalosa, Paola. 2010. (Ericaceae, Vaccinieae). Fl. Neotrop. Monogr. 108: 1-126. (Published by NYBG Press)
Pedraza-Peñalosa, Paola. 2010.
Family:
Ericaceae
Ericaceae
Description:
Latin Diagnosis - Species nova foliis ovatis, ad margines ciliatis, ciliis deciduis longis crispis eglandulosis, floribus axillaribus solitariis, 4-meris, bracteolis apicalibus tubum calycis omnino obtegentibus, superficie longitudinaliter striata, limbo calycis abaxialiter dense pubescenti, lobis ad margines ciliatis, ciliis longis crispis eglandulosis, sinubus anguste rotundatis, corolla alba tubulari adaxialiter glabra, bacca alba distincta.
Species Description - Epiphytic shrubs. Young branchlets ridged, ± smooth, villous, the hairs eglandular, brown, the indumentum of the mature branches similar but glabrate or villous. Leaves 4–7 per cm, spirally arranged, ascending; petiole 0.6–0.8 mm long, glabrate, the hairs eglandular or glandular; lamina ovate, (0.6–)0.8–1.1 × (0.3–)0.4–0.5 cm, basally obtuse or cuneate, marginally entire, ciliate with hairs deciduous, long (0.5–1 mm), curly and eglandular, apically blunt-acute, adaxially glabrous or glabrate with hairs eglandular, abaxially glabrate with glandular hairs, the venation adaxially and abaxially obscure. Axillary solitary flowers; bracts 4, chartaceous, ovate, 1–1.5 × 0.8–1.6 mm, marginally ciliolate with eglandular hairs, apically obtuse or acute, abaxially glabrous; pedicel 0.8–1 mm long, reduced and hidden by overlapping bracts, glabrate with eglandular and glandular hairs; differentiated apical bracteoles 2, distinct, chartaceous, enveloping entire calyx tube, covering 50–62% of calyx, ovate, 2.1–3 × 2.5–3 mm, marginally ciliate with hairs curly and eglandular, apically obtuse or very rarely subacute, the surface longitudinally striate, adaxially and abaxially glabrous. Flowers 4-merous. Calyx aestivation unknown, campanulate, 3.5–3.6 mm long; tube angled when dry, 1.5 mm long, abaxially glabrate with eglandular and glandular hairs; limb 2–2.1 mm long, abaxially densely pubescent with eglandular and glandular hairs, adaxially glabrous; lobes triangular, 1.8–2 × 1 mm, marginally ciliate with hairs long (0.5–1 mm long) and eglandular, apically acute; sinuses narrowly rounded (U-shaped). Corolla white (fide collectoris), thin-fleshy, bistratose, tubular in herbarium specimens, 8–11.5 mm long when dry, 4 mm diam. when dry, 3 mm wide at throat when dry, abaxially glabrate or puberulous with eglandular and glandular hairs (especially distally), adaxially glabrous; lobes 1.2–1.4 × 1.1–1.2 mm, apically acute, adaxially rugose. Stamens 8, 7.2–8.3 mm long, included; filaments distinct, straight, ± linear with parallel sides, 4–5 mm long, abaxially and adaxially glabrate; anthers distinct, papillae on both thecae and tubules; thecae 1.5–1.6 mm long, with or without basal appendages; tubules 2, distinct, 2.2–2.6 mm long, dehiscing introrsely by longitudinal slits, 0.8–1 mm long. Ovary 4-locular; style 7–11.1 mm long, exserted. Berry white (fide collectoris), the persistent calyx lobes erect or spreading; embryo color unknown.
Distribution and Ecology - Disterigma baguense is only known from the vic. La Peca, Prov. Bagua, in northern Peru (Amazonas) (Fig. 14). This species grows in cloud forests at 1700–2450 m, and its fruits are eaten by the shiny grassgreen tananger (Barbour 4102). Flowering in Jun and Oct; fruiting in Oct.
Local Names and Uses - Birds have been reported to eat the berries.
Latin Diagnosis - Species nova foliis ovatis, ad margines ciliatis, ciliis deciduis longis crispis eglandulosis, floribus axillaribus solitariis, 4-meris, bracteolis apicalibus tubum calycis omnino obtegentibus, superficie longitudinaliter striata, limbo calycis abaxialiter dense pubescenti, lobis ad margines ciliatis, ciliis longis crispis eglandulosis, sinubus anguste rotundatis, corolla alba tubulari adaxialiter glabra, bacca alba distincta.
Species Description - Epiphytic shrubs. Young branchlets ridged, ± smooth, villous, the hairs eglandular, brown, the indumentum of the mature branches similar but glabrate or villous. Leaves 4–7 per cm, spirally arranged, ascending; petiole 0.6–0.8 mm long, glabrate, the hairs eglandular or glandular; lamina ovate, (0.6–)0.8–1.1 × (0.3–)0.4–0.5 cm, basally obtuse or cuneate, marginally entire, ciliate with hairs deciduous, long (0.5–1 mm), curly and eglandular, apically blunt-acute, adaxially glabrous or glabrate with hairs eglandular, abaxially glabrate with glandular hairs, the venation adaxially and abaxially obscure. Axillary solitary flowers; bracts 4, chartaceous, ovate, 1–1.5 × 0.8–1.6 mm, marginally ciliolate with eglandular hairs, apically obtuse or acute, abaxially glabrous; pedicel 0.8–1 mm long, reduced and hidden by overlapping bracts, glabrate with eglandular and glandular hairs; differentiated apical bracteoles 2, distinct, chartaceous, enveloping entire calyx tube, covering 50–62% of calyx, ovate, 2.1–3 × 2.5–3 mm, marginally ciliate with hairs curly and eglandular, apically obtuse or very rarely subacute, the surface longitudinally striate, adaxially and abaxially glabrous. Flowers 4-merous. Calyx aestivation unknown, campanulate, 3.5–3.6 mm long; tube angled when dry, 1.5 mm long, abaxially glabrate with eglandular and glandular hairs; limb 2–2.1 mm long, abaxially densely pubescent with eglandular and glandular hairs, adaxially glabrous; lobes triangular, 1.8–2 × 1 mm, marginally ciliate with hairs long (0.5–1 mm long) and eglandular, apically acute; sinuses narrowly rounded (U-shaped). Corolla white (fide collectoris), thin-fleshy, bistratose, tubular in herbarium specimens, 8–11.5 mm long when dry, 4 mm diam. when dry, 3 mm wide at throat when dry, abaxially glabrate or puberulous with eglandular and glandular hairs (especially distally), adaxially glabrous; lobes 1.2–1.4 × 1.1–1.2 mm, apically acute, adaxially rugose. Stamens 8, 7.2–8.3 mm long, included; filaments distinct, straight, ± linear with parallel sides, 4–5 mm long, abaxially and adaxially glabrate; anthers distinct, papillae on both thecae and tubules; thecae 1.5–1.6 mm long, with or without basal appendages; tubules 2, distinct, 2.2–2.6 mm long, dehiscing introrsely by longitudinal slits, 0.8–1 mm long. Ovary 4-locular; style 7–11.1 mm long, exserted. Berry white (fide collectoris), the persistent calyx lobes erect or spreading; embryo color unknown.
Distribution and Ecology - Disterigma baguense is only known from the vic. La Peca, Prov. Bagua, in northern Peru (Amazonas) (Fig. 14). This species grows in cloud forests at 1700–2450 m, and its fruits are eaten by the shiny grassgreen tananger (Barbour 4102). Flowering in Jun and Oct; fruiting in Oct.
Local Names and Uses - Birds have been reported to eat the berries.
Discussion:
Disterigma baguense is likely to be related to D. balslevii, having the same general appearance as well as the curly and long eglandular hairs on the leaves and calyx lobes margins. Nevertheless, their distribution is disjunct with D. baguense found in the mountains of the Peruvian Amazonas region and D. balslevii growing in southern Colombia and at the border with Ecuador. Disterigma balslevii has never been collected south of Carchi and Sucumbíos, nor has it been observed during many field trips dedicated to document the Ecuadorian Ericaceae. The only possible exception is a collection made near Río Tintas, on the border between Morona-Santiago and Zamora-Chinchipe, Steyermark 53609 (A), which seems similar to D. baguense, but the specimen cannot be identified with confidence because it lacks flowers and it is not clear if it is juvenile or not. Disterigma baguense and D. balslevii can be differentiated because the calyces of D. baguense have both eglandular and glandular hairs (vs. only eglandular in D. balslevii); its calyx is shorter (3.5–3.6 mm vs. 4.3–5.9 mm); its calyx limb is shorter (2–2.1 mm vs. 2.8–4.4 mm); its calyx lobes are shorter (1.8–2 mm vs. 2–3.2 mm); its calyx tube is angled (vs. terete); its corolla is white and tubular (vs. red and narrowly urceolate); its staminal filaments are straight and glabrate (vs. geniculate and puberulous); its thecae are straight in side view (vs. prognathous); and its papillae are found all over the theca and tubules (vs. only on the thecae). Furthermore, Disterigma baguense (Fig. 13) is characterized by the following combination of characters: leaves ovate and marginally ciliate with hairs deciduous, long (0.5–1 mm), curly, and eglandular; axillary solitary flowers; differentiated apical bracteoles enveloping entire calyx tube, marginally ciliate, the surface longitudinally striate; flowers 4-merous; calyx lobes marginally ciliate with hairs deciduous, long (0.5–1 mm), sinuses narrowly rounded (U-shaped); corolla white, tubular, adaxially glabrous; papillae on both thecae and tubules; and white berries.
Disterigma baguense is likely to be related to D. balslevii, having the same general appearance as well as the curly and long eglandular hairs on the leaves and calyx lobes margins. Nevertheless, their distribution is disjunct with D. baguense found in the mountains of the Peruvian Amazonas region and D. balslevii growing in southern Colombia and at the border with Ecuador. Disterigma balslevii has never been collected south of Carchi and Sucumbíos, nor has it been observed during many field trips dedicated to document the Ecuadorian Ericaceae. The only possible exception is a collection made near Río Tintas, on the border between Morona-Santiago and Zamora-Chinchipe, Steyermark 53609 (A), which seems similar to D. baguense, but the specimen cannot be identified with confidence because it lacks flowers and it is not clear if it is juvenile or not. Disterigma baguense and D. balslevii can be differentiated because the calyces of D. baguense have both eglandular and glandular hairs (vs. only eglandular in D. balslevii); its calyx is shorter (3.5–3.6 mm vs. 4.3–5.9 mm); its calyx limb is shorter (2–2.1 mm vs. 2.8–4.4 mm); its calyx lobes are shorter (1.8–2 mm vs. 2–3.2 mm); its calyx tube is angled (vs. terete); its corolla is white and tubular (vs. red and narrowly urceolate); its staminal filaments are straight and glabrate (vs. geniculate and puberulous); its thecae are straight in side view (vs. prognathous); and its papillae are found all over the theca and tubules (vs. only on the thecae). Furthermore, Disterigma baguense (Fig. 13) is characterized by the following combination of characters: leaves ovate and marginally ciliate with hairs deciduous, long (0.5–1 mm), curly, and eglandular; axillary solitary flowers; differentiated apical bracteoles enveloping entire calyx tube, marginally ciliate, the surface longitudinally striate; flowers 4-merous; calyx lobes marginally ciliate with hairs deciduous, long (0.5–1 mm), sinuses narrowly rounded (U-shaped); corolla white, tubular, adaxially glabrous; papillae on both thecae and tubules; and white berries.
Distribution:
Peru South America| Amazonas Peru South America|
Peru South America| Amazonas Peru South America|