Taxon Details: Mecranium integrifolium (Naudin) Triana
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Family:
Melastomataceae (Magnoliophyta)
Melastomataceae (Magnoliophyta)
Scientific Name:
Mecranium integrifolium (Naudin) Triana
Mecranium integrifolium (Naudin) Triana
Primary Citation:
Trans. Linn. Soc. London 28(1): 139. 1871
Trans. Linn. Soc. London 28(1): 139. 1871
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Synonyms:
Mecranium amygdalinum var. integrifolium (Naudin) Cogn.
Ossaea integrifolia var. latifolia Naudin
Ossaea integrifolia Naudin
Mecranium integrifolium (Naudin) Triana
Mecranium amygdalinum var. integrifolium (Naudin) Cogn.
Ossaea integrifolia var. latifolia Naudin
Ossaea integrifolia Naudin
Mecranium integrifolium (Naudin) Triana
Description:
Description Author and Date: James D. Skean, Jr., January 2011, based on Skean, J. D., Jr. 1993. Monograph of Mecranium (Melastomataceae-Miconieae). Syst. Bot. Monogr. 39: 1-116.
Type: CUBA. [Oriente]: vicinity of San Yago, Nima Nima, fl, Aug 1844, Linden 2125 (holotype: P!; isotypes: BM! BR-2! E! G-5! MO! NY-2! P!).
Description: Shrub or small tree to ca 5 m tall. Twigs slightly to moderately 4-angled, 1.5-3 mm in diameter, smooth, essentially glabrous to pubescent with brown unbranched to irregularly branched and matted multicellular hairs concentrated in internodal grooves and on nodal ridges of youngest twigs; internodes (0.6-) 1-2.9 (-7.2) cm long. Leaf blade (1.6-) 2.5-10.4 cm long, 0.8-3.2 (-3.9) cm wide, narrowly ovate or elliptic, membranaceous or coriaceous, often slightly curved abaxially; apex acuminate; base cuneate or slightly decurrent, less commonly acute; margin plane or often revolute near base forming basal pseudodomatia, very obscurely to conspicuously serrate on distal ca 3/4; venation generally suprabasal, usually with 1 pair of conspicuous secondary veins joining midvein 0.5-11 mm above lamina base, and 1 pair of inconspicuous, intramarginal secondary veins; adaxial surface with midvein, largest pair of secondary veins, and tertiary veins flat or slightly to strongly impressed, usually flattening upon drying; abaxial surface with midvein and largest pair of secondary veins raised, the intramarginal secondary veins and tertiary veins flat or slightly raised, the quaternary and higher order veins flat, or (in subsp. alainii) often slightly raised, the surface appearing nearly glabrous or pubescent with hairs similar to those on stem concentrated on veins and in persistent axillary tufts at junction of midvein and largest pair of secondary veins, minute glandular hairs also present, marsupiform domatia absent at junction of midvein and largest pair of secondary veins. Petiole (2-) 4-19 mm long, essentially glabrous or pubescent with hairs similar to those on stem concentrated on edges of groove. Inflorescences borne in leaf axils and on leafless nodes below leaves, 1.3-2.6 (-3.4) cm long, 0.5-2 cm wide, 1-2 branched; peduncle 5-15 mm long. Hypanthium 1.3-2.1 mm long, 1.4-2.2 mm wide, slightly obconical or subglobose, sparsely to moderately pubescent with minute glandular hairs, the portion free from ovary 0.4-0.7 mm long; portion of calyx bearing external teeth 0.2-0.3 mm long. Calyx teeth ca 0.2 mm long, 0.2 mm wide. Calyptra present in bud, dome-like, with a caducous apiculum to ca 0.1 mm long. Petals 1.3-2.2 mm long, 0.9-1.5 mm wide, obovate, slightly cupped adaxially, white, spreading; apex rounded, emarginate. Stamens white; filament narrowly ovate, 1.3-2 mm long, 0.3-0.7 mm wide; anther narrowly obovate, 1.3-1.8 mm long, 0.3-0.6 mm wide, the anther sacs 0.3-0.8 mm long, opening by a single gaping foramen, septum torn. Ovary inferior, 0.8-1.4 mm long, 0.9-1.4 mm wide, the apical appendage 0.3-0.6 mm high; style 2.6-3.2 mm long, 0.3-0.4 mm wide, white, straight or slightly curved; stigma 0.3-0.4 mm across. Berries ca 5 mm in diameter, purple-black, glabrous or with a few minute glandular hairs; seeds 0.6-0.7 mm long, 0.3-0.4 mm wide.
Phenology: Flowering from April through October, with a peak in June and July. Mature fruits produced beginning in early fall.
Key to infraspecific species:
1: Leaves membranaceous or coriaceous, blade 0.1-0.4 mm thick (measured at midleaf away from major veins); abaxial surface with smallest veinlets flat in dried material (viewed at 20x or higher magnification), junction of midvein and 2 largest 2° veins usually with axillary tufts of hairs; Cuba or N. Hispaniola ......... 2.
1: Leaves very coriaceous, blade 0.5-0.7 mm thick; abaxial surface with smallest veinlets slightly raised in dried material, junction of midvein and 2 largest 2° veins usually glabrous; E. Cuba ......... M. integrifolium subsp. alainii
2: Leaves usually appearing nearly entire to very obscurely toothed; teeth 0.08-0.17 (-0.25) mm high, their apices the same thickness as margin; Cuba ......... M. integrifolium subsp. integrifolium
2: Leaves usually visibly toothed in distal portion; teeth 0.17-0.32 mm high, their apices usually conspicuously thickened; N. Hispaniola ......... M. integrifolium subsp. neibense
Description Author and Date: James D. Skean, Jr., January 2011, based on Skean, J. D., Jr. 1993. Monograph of Mecranium (Melastomataceae-Miconieae). Syst. Bot. Monogr. 39: 1-116.
Type: CUBA. [Oriente]: vicinity of San Yago, Nima Nima, fl, Aug 1844, Linden 2125 (holotype: P!; isotypes: BM! BR-2! E! G-5! MO! NY-2! P!).
Description: Shrub or small tree to ca 5 m tall. Twigs slightly to moderately 4-angled, 1.5-3 mm in diameter, smooth, essentially glabrous to pubescent with brown unbranched to irregularly branched and matted multicellular hairs concentrated in internodal grooves and on nodal ridges of youngest twigs; internodes (0.6-) 1-2.9 (-7.2) cm long. Leaf blade (1.6-) 2.5-10.4 cm long, 0.8-3.2 (-3.9) cm wide, narrowly ovate or elliptic, membranaceous or coriaceous, often slightly curved abaxially; apex acuminate; base cuneate or slightly decurrent, less commonly acute; margin plane or often revolute near base forming basal pseudodomatia, very obscurely to conspicuously serrate on distal ca 3/4; venation generally suprabasal, usually with 1 pair of conspicuous secondary veins joining midvein 0.5-11 mm above lamina base, and 1 pair of inconspicuous, intramarginal secondary veins; adaxial surface with midvein, largest pair of secondary veins, and tertiary veins flat or slightly to strongly impressed, usually flattening upon drying; abaxial surface with midvein and largest pair of secondary veins raised, the intramarginal secondary veins and tertiary veins flat or slightly raised, the quaternary and higher order veins flat, or (in subsp. alainii) often slightly raised, the surface appearing nearly glabrous or pubescent with hairs similar to those on stem concentrated on veins and in persistent axillary tufts at junction of midvein and largest pair of secondary veins, minute glandular hairs also present, marsupiform domatia absent at junction of midvein and largest pair of secondary veins. Petiole (2-) 4-19 mm long, essentially glabrous or pubescent with hairs similar to those on stem concentrated on edges of groove. Inflorescences borne in leaf axils and on leafless nodes below leaves, 1.3-2.6 (-3.4) cm long, 0.5-2 cm wide, 1-2 branched; peduncle 5-15 mm long. Hypanthium 1.3-2.1 mm long, 1.4-2.2 mm wide, slightly obconical or subglobose, sparsely to moderately pubescent with minute glandular hairs, the portion free from ovary 0.4-0.7 mm long; portion of calyx bearing external teeth 0.2-0.3 mm long. Calyx teeth ca 0.2 mm long, 0.2 mm wide. Calyptra present in bud, dome-like, with a caducous apiculum to ca 0.1 mm long. Petals 1.3-2.2 mm long, 0.9-1.5 mm wide, obovate, slightly cupped adaxially, white, spreading; apex rounded, emarginate. Stamens white; filament narrowly ovate, 1.3-2 mm long, 0.3-0.7 mm wide; anther narrowly obovate, 1.3-1.8 mm long, 0.3-0.6 mm wide, the anther sacs 0.3-0.8 mm long, opening by a single gaping foramen, septum torn. Ovary inferior, 0.8-1.4 mm long, 0.9-1.4 mm wide, the apical appendage 0.3-0.6 mm high; style 2.6-3.2 mm long, 0.3-0.4 mm wide, white, straight or slightly curved; stigma 0.3-0.4 mm across. Berries ca 5 mm in diameter, purple-black, glabrous or with a few minute glandular hairs; seeds 0.6-0.7 mm long, 0.3-0.4 mm wide.
Phenology: Flowering from April through October, with a peak in June and July. Mature fruits produced beginning in early fall.
Key to infraspecific species:
1: Leaves membranaceous or coriaceous, blade 0.1-0.4 mm thick (measured at midleaf away from major veins); abaxial surface with smallest veinlets flat in dried material (viewed at 20x or higher magnification), junction of midvein and 2 largest 2° veins usually with axillary tufts of hairs; Cuba or N. Hispaniola ......... 2.
1: Leaves very coriaceous, blade 0.5-0.7 mm thick; abaxial surface with smallest veinlets slightly raised in dried material, junction of midvein and 2 largest 2° veins usually glabrous; E. Cuba ......... M. integrifolium subsp. alainii
2: Leaves usually appearing nearly entire to very obscurely toothed; teeth 0.08-0.17 (-0.25) mm high, their apices the same thickness as margin; Cuba ......... M. integrifolium subsp. integrifolium
2: Leaves usually visibly toothed in distal portion; teeth 0.17-0.32 mm high, their apices usually conspicuously thickened; N. Hispaniola ......... M. integrifolium subsp. neibense