Taxon Details: Miconia chinantlana (Naudin) Almeda
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Narratives:
Family:
Melastomataceae (Magnoliophyta)
Melastomataceae (Magnoliophyta)
Scientific Name:
Miconia chinantlana (Naudin) Almeda
Miconia chinantlana (Naudin) Almeda
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Description:
Description Author and Date: Frank Almeda, based on Almeda, F. (2009). Melastomataceae. In: G. Davidse, M. Sousa-Sânchez, S. Knapp, & F. Chiang (eds.), Flora Mesoamericana: Cucurbitaceae a Polemoniaceae. 4(1): 164-338.
Type: Holotype: Mexico, Galeotti 2945 (P!)
Description: Shrub 1.5-4 m tall, the uppermost terete cauline internodes, petioles, abaxial leaf surfaces, inflorescence rachis, hypanthia, calyx lobes, and exterior calyx teeth copiously covered with yellowish spreading stalked-stellate hairs. Leaves of a pair ± equal to unequal in size; blades 9.7-20 x 4-9.5 cm, ovate to lance-ovate, 5-7-plinerved with the innermost pair of primary veins diverging from the midvein in opposite or subalternate fashion 0.5-1.7 cm above the blade base, apex long acuminate, base obtuse to broadly rounded and commonly oblique, the margin inconspicuously ciliate-serrulate to nearly entire, the adaxial surface copiously covered with smooth spreading apically curved hairs 0.25-0.5 mm long; petioles 0.6-4.8 cm long. Inflorescence a terminal paniculiform dichasium 4-9 cm long with ultimate branchlets terminating in simple 3-flowered dichasia, flowers 5-merous, essentially sessile at anthesis with pedicels to 0.5-1 mm in fruit; bracts and bracteoles deciduous, subulate to elliptic, 1-2 x 0.25-0.4 mm, adaxial surface glabrous, abaxial surface beset with stalked-stellate hairs, the margin ciliate and terminating in a smooth hair. Hypanthial indument typically not concealing the actual surface at anthesis. Calyx tube 0.25 mm long, the calyx lobes ovate-rounded to ovate-oblong, 1.5-2 X 1.5 mm, the exterior calyx teeth stoutly subulate, 2-3 mm long and conspicuously exceeding the calyx lobes in length. Petals glabrous, oblong-obovate and reflexed at anthesis, 3-5 x 1.75-2 mm. Anthers isomorphic, 3-3.5 mm long, yellow, linear-oblong with a ventrally inclined apical pore; connective thickened dorsally but neither prolonged nor appendaged. Style sparsely covered with minute stellate and glandular hairs, 8 mm long; stigma punctiform; ovary 5-locular, 2/3 inferior, apex of fruiting hypanthia truncate and glabrous around the stylar scar but glandular-puberulent in a wide ring around the style. Berry purple-black when mature, 6-7 x 6-7 mm when dry. Seeds ovoid, the testa vaguely rugulate, 0.75-1 mm long.
Habitat and Distribution: Local and uncommon in rain forests and pine-oak-Liquidambar forests. 1250-1900 m. (Oaxaca). MEXICO: Chiapas (Breedlove 52655, CAS); GUATEMALA (Steyermark 48831, F).
Taxonomy and Systematics: Miconia chinantlana is very close to and readily confused with Miconia globulifera Naudin which also occurs in southeastern Mexico (Chiapas, Oaxaca, and Veracruz) and Guatemala. These two species are similar in habit, foliar shape, venation, indument, and in having 5-merous flowers and a 5-locular ovary. Miconia globulifera differs in having the flowers aggregated in capitate clusters of more than three flowers at the ends of the inflorescence branchlets, the calyx teeth are 0.5-1 mm long and barely exceeding the calyx lobes in length, the hypanthia are beset with simple and apically bifid hairs 1-1.5 mm long that conceal the actual surface at anthesis, and the style is essentially glabrous.
Notes: [Description based only on Mesoamerican specimens.]
Description Author and Date: Frank Almeda, based on Almeda, F. (2009). Melastomataceae. In: G. Davidse, M. Sousa-Sânchez, S. Knapp, & F. Chiang (eds.), Flora Mesoamericana: Cucurbitaceae a Polemoniaceae. 4(1): 164-338.
Type: Holotype: Mexico, Galeotti 2945 (P!)
Description: Shrub 1.5-4 m tall, the uppermost terete cauline internodes, petioles, abaxial leaf surfaces, inflorescence rachis, hypanthia, calyx lobes, and exterior calyx teeth copiously covered with yellowish spreading stalked-stellate hairs. Leaves of a pair ± equal to unequal in size; blades 9.7-20 x 4-9.5 cm, ovate to lance-ovate, 5-7-plinerved with the innermost pair of primary veins diverging from the midvein in opposite or subalternate fashion 0.5-1.7 cm above the blade base, apex long acuminate, base obtuse to broadly rounded and commonly oblique, the margin inconspicuously ciliate-serrulate to nearly entire, the adaxial surface copiously covered with smooth spreading apically curved hairs 0.25-0.5 mm long; petioles 0.6-4.8 cm long. Inflorescence a terminal paniculiform dichasium 4-9 cm long with ultimate branchlets terminating in simple 3-flowered dichasia, flowers 5-merous, essentially sessile at anthesis with pedicels to 0.5-1 mm in fruit; bracts and bracteoles deciduous, subulate to elliptic, 1-2 x 0.25-0.4 mm, adaxial surface glabrous, abaxial surface beset with stalked-stellate hairs, the margin ciliate and terminating in a smooth hair. Hypanthial indument typically not concealing the actual surface at anthesis. Calyx tube 0.25 mm long, the calyx lobes ovate-rounded to ovate-oblong, 1.5-2 X 1.5 mm, the exterior calyx teeth stoutly subulate, 2-3 mm long and conspicuously exceeding the calyx lobes in length. Petals glabrous, oblong-obovate and reflexed at anthesis, 3-5 x 1.75-2 mm. Anthers isomorphic, 3-3.5 mm long, yellow, linear-oblong with a ventrally inclined apical pore; connective thickened dorsally but neither prolonged nor appendaged. Style sparsely covered with minute stellate and glandular hairs, 8 mm long; stigma punctiform; ovary 5-locular, 2/3 inferior, apex of fruiting hypanthia truncate and glabrous around the stylar scar but glandular-puberulent in a wide ring around the style. Berry purple-black when mature, 6-7 x 6-7 mm when dry. Seeds ovoid, the testa vaguely rugulate, 0.75-1 mm long.
Habitat and Distribution: Local and uncommon in rain forests and pine-oak-Liquidambar forests. 1250-1900 m. (Oaxaca). MEXICO: Chiapas (Breedlove 52655, CAS); GUATEMALA (Steyermark 48831, F).
Taxonomy and Systematics: Miconia chinantlana is very close to and readily confused with Miconia globulifera Naudin which also occurs in southeastern Mexico (Chiapas, Oaxaca, and Veracruz) and Guatemala. These two species are similar in habit, foliar shape, venation, indument, and in having 5-merous flowers and a 5-locular ovary. Miconia globulifera differs in having the flowers aggregated in capitate clusters of more than three flowers at the ends of the inflorescence branchlets, the calyx teeth are 0.5-1 mm long and barely exceeding the calyx lobes in length, the hypanthia are beset with simple and apically bifid hairs 1-1.5 mm long that conceal the actual surface at anthesis, and the style is essentially glabrous.
Notes: [Description based only on Mesoamerican specimens.]