Taxon Details: Miconia reticulato-venosa Judd, Bécquer & Majure
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Narratives:
Family:
Melastomataceae (Magnoliophyta)
Melastomataceae (Magnoliophyta)
Scientific Name:
Miconia reticulato-venosa Judd, Bécquer & Majure
Miconia reticulato-venosa Judd, Bécquer & Majure
Primary Citation:
Taxonomic studies in the Miconieae (Melastomataceae). XI. A revision of Miconia sect. Calycopteris on Hispaniola
Brittonia 66: 216--249. 2014
Taxonomic studies in the Miconieae (Melastomataceae). XI. A revision of Miconia sect. Calycopteris on Hispaniola
Brittonia 66: 216--249. 2014
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Synonyms:
Henriettella reticulata Cogn.
Calycogonium reticulatum (Cogn.) Judd & Skean
Ossaea reticulata (Cogn.) Ekman ex Urb.
Ossaea furfuracea Urb.
Henriettella reticulata Cogn.
Calycogonium reticulatum (Cogn.) Judd & Skean
Ossaea reticulata (Cogn.) Ekman ex Urb.
Ossaea furfuracea Urb.
Description:
Description Author and Date: Walter S. Judd, Eldis R. Bécquer & Lucas C. Majure modified from "Taxonomic studies in the Miconieae (Melastomataceae). XI. A revision of Miconia sect. Calycopteris on Hispaniola". Judd, W.S., Bécquer, E.R. & Majure, L.C.; Brittonia 66(3): 224. 2014
Type: Dominican Republic. [Prov. La Vega:] prope Constanza, ad rivulum, 1200 m, Mar 1910 (fl), H. von Türckheim 3098 (holotype: BR, on-line image seen #5640256; isotypes: A, BR, two on-line images seen #5630899 and #5640584, F, 2 sheets, GH, K, on-line image seen #537073, M, on-line image seen #165441, NY, S, US).
Description: Shrub to 3 m tall. Young stems elliptic to ± rectangular in cross section, to terete, the indumentum of dense, ferruginous, globularstellate hairs, 0.2–0.46 mm across, internodes 0.5–10.5 cm long, nodal line absent. Leaves often slightly anisophyllous, i.e., large leaf/ small leaf quotient 1–2.3; petiole 0.4–3.4 cm long, the indumentum dense, globular-stellate hairs; blade 2–16 × 0.8–5.3 cm, broadly to narrowly ovate, to occasionally elliptic, coriaceous, the apex acute to acuminate or attenuate (rarely rounded-mucronate or obtuse- mucronate), the base cordate or rounded to acute, the margin plane to slightly revolute, clearly and irregularly to obscurely dentateserrate, to merely undulate or entire, the largest teeth (if present) 0.2–1.5 mm; secondary veins 2 or 3 pairs, 1 or 2 conspicuous and 1 inconspicuous, acrodromous, ± basal, but often appearing suprabasal, the innermost pair joining midvein 1–13 mm above leaf base, the conspicuous secondary veins (or innermost conspicuous secondary veins) placed 1–8.5 mm from margin, the outermost conspicuous secondary veins or the inconspicuous secondary veins intramarginal to 2.3 mm from margin (or ending near leaf base), tertiary veins percurrent, or iented subperpendicular to midvein, 1.3–12 mm apart, usually connected by 1–4 quaternary veins but rarely separated by poorly developed, composite inter-tertiary veins, the higher order veins reticulate, visible, areoles visible, rectangular to polygonal, the midvein and major secondary veins moderately to slightly impressed adaxially, tertiary veins slightly impressed to flat and visible adaxially, remaining veins slightly impressed to flat, visible to obscure on adaxial surface, the midvein conspicuously raised abaxially, the major secondary veins strongly raised abaxially, the minor secondary veins and tertiary veins moderately raised abaxially, and the higher order veins slightly raised to flat and visible on abaxial surface; adaxial surface green, shiny when living, appearing slightly wrinkled after drying, and drying distinctly darker than the abaxial surface, the indumentum initially of sparse to moderate globular-stellate and minute-globular hairs, but very quickly glabrescent, although occasionally with a few globular-stellate hairs on basal portion of midvein, also with a few smooth, elongate, eglandular hairs, these most common near, or restricted to, the marginal region, but the central laminar regions (i.e., least inclusive regions bounded by midvein, secondary vein, and tertiary veins) with 0–7 such hairs; abaxial surface pale green, the surface glabrous, the veins (even the very smallest) with dense to moderate, ± ferruginous, globular-stellate hairs, usually 0.1–0.56 mm across, even the smallest veins with conspicuous globularstellate hairs, contrasting with the lamina, giving the surface a distinctly reticulate pattern. Inflorescences exclusively axillary (with flowers in leaf axils or on older, leafless nodes) or occasionally terminal and axillary (and the reproductive shoots usually producing numerous leafy nodes), a ± sessile glomerulate cluster of up to 15 flowers, but sometimes reduced to a 3-flowered dichasium or only a solitary flower; bracts 0.7–4 × 0.4– 1.8 mm, narrowly triangular to ovate, ± persistent; bracteoles 0.5–1 × 0.3–1 mm, broadly to narrowly triangular, persistent. Flowers 4-merous, slightly zygomorphic; pedicel 0–1.5 mm long. Hypanthium 1.2–1.9 mm long, distinctly 4-lobed, ± constricted above ovary, the free portion 0.4–0.6 mm long, 1.1–1.7 mm wide at the torus, cylindrical to slightly flaring, the outer surface with moderate to dense globular-stellate hairs, the internal surface smooth, glabrous. Calyx with tube 0.25–0.45 mm long at anthesis, sometimes tearing between the lobes, and in fruit usually nearly completely torn (i.e., torn nearly to base of tube), the 4 lobes 0.4–0.7 × 0.9–1.5 mm, but appearing longer in fruit, ± triangular or broadly so, with sparse minute-globular hairs and sometimes a few branched hairs adaxially, and with moderate globular-stellate hairs abaxially, green, the apex acute; calyx teeth arising from along lontitudinal midline of the calyx lobes, 0.4– 0.8 mm long, flattened parallel with the floral radii, thus linear when viewed from above, and triangular when viewed from the side, 0.4–0.6 mm across, green, with ± acute (rarely obtuse) apex, with sparse to moderate globular-stellate hairs. Petals 4, 1.9–2.3 × 1.3–1.7 mm, asymmetrically obovate, spreading to reflexed, white at anthesis, glabrous, the apex obscurely obtuse to ± rounded and with a slight to well-defined notch, the margin entire to ± erose. Stamens 8, ± geniculate at apex of filament, ± actinomorphic at anthesis; staminal filament 1.3–1.6 mm long, glabrous, cream/ white, anther thecae 0.85–1.4 × 0.5–0.6 mm, shortly ovoid, straight, opening by a small apical pore, at anthesis yellow or pale yellow, the connective with variably developed dorso-basal appendage. Ovary 4-locular, completely inferior, 0.9–1.3 × 1.3– 1.65 mm, apically flat, smooth, glab
Phenology: Miconia reticulato-venosa has been collected in flower from February to July.
Distribution and ecology: Hispaniola (Dominican Republic and Haiti), Cordillera Central, Massif des Cahos, Massif des Matheux, and Massif de la Selle; in moist broadleaved forests and moist forests of Pinus occidentalis, often along streams or rivers; 1000–1500 m. These forests are described in Ciferri (1936).
Taxonomy and Systematics: Miconia reticulato-venosa is fairly uniform in vegetative and reproductive characters. Some specimens, however, have narrower leaves (in relation to their length) than is typical in the species (see especially Ekman H7640, H9306). There is also variation in the development of the marginal teeth, i.e., entire to clearly serrate (compare, for example, Ekman H5521 and Judd 5127). The variation in leaf shape and margin is more or less continuous, and is not geographically correlated. Thus, Ossaea furfuracea cannot be considered specifically distinct. The species may be confused with Miconia vegaensis, however, as indicated in the key the two are easily distinguished by the abaxial leaf indumentum (i.e., the epidermal surface of the abaxial lamina is always apparent in M. reticulato-venosa, but obscured in M. vegaensis). Miconia reticulato-venosa is likely most closely related to the allopatric M. maculata, which has similar abaxial indumentum (see key for distinguishing features). All three species are distinctive within Hispaniolan Miconia sect. Calycopteris because of their production of axillary inflorescences. The new epithet “reticulato-venosa” is necessary since combinations based upon the available epithets are already occupied in Miconia, i.e., Miconia reticulata Triana and M. furfuracea Griseb. The name Miconia reticulato-venosa is meant to call to mind the name Calycogonium reticulatum, the specific epithet of which is based upon the distinctive pattern of reticulate venation evident on the abaxial leaf surface.
Description Author and Date: Walter S. Judd, Eldis R. Bécquer & Lucas C. Majure modified from "Taxonomic studies in the Miconieae (Melastomataceae). XI. A revision of Miconia sect. Calycopteris on Hispaniola". Judd, W.S., Bécquer, E.R. & Majure, L.C.; Brittonia 66(3): 224. 2014
Type: Dominican Republic. [Prov. La Vega:] prope Constanza, ad rivulum, 1200 m, Mar 1910 (fl), H. von Türckheim 3098 (holotype: BR, on-line image seen #5640256; isotypes: A, BR, two on-line images seen #5630899 and #5640584, F, 2 sheets, GH, K, on-line image seen #537073, M, on-line image seen #165441, NY, S, US).
Description: Shrub to 3 m tall. Young stems elliptic to ± rectangular in cross section, to terete, the indumentum of dense, ferruginous, globularstellate hairs, 0.2–0.46 mm across, internodes 0.5–10.5 cm long, nodal line absent. Leaves often slightly anisophyllous, i.e., large leaf/ small leaf quotient 1–2.3; petiole 0.4–3.4 cm long, the indumentum dense, globular-stellate hairs; blade 2–16 × 0.8–5.3 cm, broadly to narrowly ovate, to occasionally elliptic, coriaceous, the apex acute to acuminate or attenuate (rarely rounded-mucronate or obtuse- mucronate), the base cordate or rounded to acute, the margin plane to slightly revolute, clearly and irregularly to obscurely dentateserrate, to merely undulate or entire, the largest teeth (if present) 0.2–1.5 mm; secondary veins 2 or 3 pairs, 1 or 2 conspicuous and 1 inconspicuous, acrodromous, ± basal, but often appearing suprabasal, the innermost pair joining midvein 1–13 mm above leaf base, the conspicuous secondary veins (or innermost conspicuous secondary veins) placed 1–8.5 mm from margin, the outermost conspicuous secondary veins or the inconspicuous secondary veins intramarginal to 2.3 mm from margin (or ending near leaf base), tertiary veins percurrent, or iented subperpendicular to midvein, 1.3–12 mm apart, usually connected by 1–4 quaternary veins but rarely separated by poorly developed, composite inter-tertiary veins, the higher order veins reticulate, visible, areoles visible, rectangular to polygonal, the midvein and major secondary veins moderately to slightly impressed adaxially, tertiary veins slightly impressed to flat and visible adaxially, remaining veins slightly impressed to flat, visible to obscure on adaxial surface, the midvein conspicuously raised abaxially, the major secondary veins strongly raised abaxially, the minor secondary veins and tertiary veins moderately raised abaxially, and the higher order veins slightly raised to flat and visible on abaxial surface; adaxial surface green, shiny when living, appearing slightly wrinkled after drying, and drying distinctly darker than the abaxial surface, the indumentum initially of sparse to moderate globular-stellate and minute-globular hairs, but very quickly glabrescent, although occasionally with a few globular-stellate hairs on basal portion of midvein, also with a few smooth, elongate, eglandular hairs, these most common near, or restricted to, the marginal region, but the central laminar regions (i.e., least inclusive regions bounded by midvein, secondary vein, and tertiary veins) with 0–7 such hairs; abaxial surface pale green, the surface glabrous, the veins (even the very smallest) with dense to moderate, ± ferruginous, globular-stellate hairs, usually 0.1–0.56 mm across, even the smallest veins with conspicuous globularstellate hairs, contrasting with the lamina, giving the surface a distinctly reticulate pattern. Inflorescences exclusively axillary (with flowers in leaf axils or on older, leafless nodes) or occasionally terminal and axillary (and the reproductive shoots usually producing numerous leafy nodes), a ± sessile glomerulate cluster of up to 15 flowers, but sometimes reduced to a 3-flowered dichasium or only a solitary flower; bracts 0.7–4 × 0.4– 1.8 mm, narrowly triangular to ovate, ± persistent; bracteoles 0.5–1 × 0.3–1 mm, broadly to narrowly triangular, persistent. Flowers 4-merous, slightly zygomorphic; pedicel 0–1.5 mm long. Hypanthium 1.2–1.9 mm long, distinctly 4-lobed, ± constricted above ovary, the free portion 0.4–0.6 mm long, 1.1–1.7 mm wide at the torus, cylindrical to slightly flaring, the outer surface with moderate to dense globular-stellate hairs, the internal surface smooth, glabrous. Calyx with tube 0.25–0.45 mm long at anthesis, sometimes tearing between the lobes, and in fruit usually nearly completely torn (i.e., torn nearly to base of tube), the 4 lobes 0.4–0.7 × 0.9–1.5 mm, but appearing longer in fruit, ± triangular or broadly so, with sparse minute-globular hairs and sometimes a few branched hairs adaxially, and with moderate globular-stellate hairs abaxially, green, the apex acute; calyx teeth arising from along lontitudinal midline of the calyx lobes, 0.4– 0.8 mm long, flattened parallel with the floral radii, thus linear when viewed from above, and triangular when viewed from the side, 0.4–0.6 mm across, green, with ± acute (rarely obtuse) apex, with sparse to moderate globular-stellate hairs. Petals 4, 1.9–2.3 × 1.3–1.7 mm, asymmetrically obovate, spreading to reflexed, white at anthesis, glabrous, the apex obscurely obtuse to ± rounded and with a slight to well-defined notch, the margin entire to ± erose. Stamens 8, ± geniculate at apex of filament, ± actinomorphic at anthesis; staminal filament 1.3–1.6 mm long, glabrous, cream/ white, anther thecae 0.85–1.4 × 0.5–0.6 mm, shortly ovoid, straight, opening by a small apical pore, at anthesis yellow or pale yellow, the connective with variably developed dorso-basal appendage. Ovary 4-locular, completely inferior, 0.9–1.3 × 1.3– 1.65 mm, apically flat, smooth, glab
Phenology: Miconia reticulato-venosa has been collected in flower from February to July.
Distribution and ecology: Hispaniola (Dominican Republic and Haiti), Cordillera Central, Massif des Cahos, Massif des Matheux, and Massif de la Selle; in moist broadleaved forests and moist forests of Pinus occidentalis, often along streams or rivers; 1000–1500 m. These forests are described in Ciferri (1936).
Taxonomy and Systematics: Miconia reticulato-venosa is fairly uniform in vegetative and reproductive characters. Some specimens, however, have narrower leaves (in relation to their length) than is typical in the species (see especially Ekman H7640, H9306). There is also variation in the development of the marginal teeth, i.e., entire to clearly serrate (compare, for example, Ekman H5521 and Judd 5127). The variation in leaf shape and margin is more or less continuous, and is not geographically correlated. Thus, Ossaea furfuracea cannot be considered specifically distinct. The species may be confused with Miconia vegaensis, however, as indicated in the key the two are easily distinguished by the abaxial leaf indumentum (i.e., the epidermal surface of the abaxial lamina is always apparent in M. reticulato-venosa, but obscured in M. vegaensis). Miconia reticulato-venosa is likely most closely related to the allopatric M. maculata, which has similar abaxial indumentum (see key for distinguishing features). All three species are distinctive within Hispaniolan Miconia sect. Calycopteris because of their production of axillary inflorescences. The new epithet “reticulato-venosa” is necessary since combinations based upon the available epithets are already occupied in Miconia, i.e., Miconia reticulata Triana and M. furfuracea Griseb. The name Miconia reticulato-venosa is meant to call to mind the name Calycogonium reticulatum, the specific epithet of which is based upon the distinctive pattern of reticulate venation evident on the abaxial leaf surface.