Taxon Details: Miconia kollmannii R.Goldenb. & Reginato
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Narratives:
Family:
Melastomataceae (Magnoliophyta)
Melastomataceae (Magnoliophyta)
Scientific Name:
Miconia kollmannii R.Goldenb. & Reginato
Miconia kollmannii R.Goldenb. & Reginato
Primary Citation:
Three new species of Melastomataceae from the southeastern Atlantic Forest of Brazil.
Brittonia 59(4): 337. 2007
Three new species of Melastomataceae from the southeastern Atlantic Forest of Brazil.
Brittonia 59(4): 337. 2007
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Description:
Description Author and Date: Renato Goldenberg, Oct. 2011, modified from original description, Goldenberg, R. & M. Reginato. 2007. Brittonia 59(4): 334-342.
Type: Brazil. Espírito Santo: Santa Teresa, Nova Lombardia, Reserva Biológica Augusto Ruschi, 28 Nov 2001 (fl), L. Kollmann et al. 5064 (holotype: MBML; isotype: UPCB).
Description: Shrub ca. 3 m high; young branches slightly flattened, along with the petioles densely covered by stipitate stellate-lepidote plus stellate trichomes. Leaves opposite; petioles 1-2.5 cm; blades 5.3-12 x 1.35-5 cm, elliptic to lanceate, apex acute to acuminate, base acute, margin entire to repand, chartaceous, longitudinal nerves 3 with a faint additional pair of marginals, acrodromous shortly supra-basal (inner pair up to 5 mm distant from the base), main veins prominent and transversal tenuous on abaxial surface, main veins impressed and transversal imperceptible on adaxial surface, discolorous, adaxial surface glabrous, abaxial densely covered by ochraceous to reddish, short stellate-stipitate and flat-topped trichomes (somewhat resembling a stipitate-lepidote one, but presenting branches on the axis, below the top), intermingled by a thick layer of canescent, stellate trichomes. Panicles 6-12 x 2.5-8 cm, terminal with additional axillary branches at the second leaf pair, the terminal ones consisting of three panicles (one central and two lateral, these developing more or less parallel to the leaf pair), each panicle lacking accessory branches, with 3-8 pairs of short paraclades, these with 1-2 pairs of 2nd order paraclades or with a terminal flower and successive dichasial branches and slightly congested (but not forming glomerules) and sometimes somewhat depauperate, suggesting a short scorpioid branching pattern; inflorescence branches densely covered with stellate and short stipitate-stellate trichomes; bracts 1.4-1.9 mm long, lanceate to linear and mostly caducous; bracteoles 0.7-1.4 mm long, linear, persistent. Flowers 4(-5)-merous, with a constriction at the base resembling a very short, 0.15 mm long, pedicel. Hypanthium 1.2-1.4 x ca. 1 mm, campanulate, inner surface glabrous, outer with the same trichomes described for the inflorescence, but a little sparser on the proximal half, torus glabrous. Calyx apparently persistent in young fruits, inner surface glabrous, outer with trichomes similar to the ones on the hypanthium, margin entire; tube ca. 0.2 mm high, lobes 0.2-0.3 mm long, triangular, acute, the dorsal teeth 0.1-0.2 mm long, acute, thick. Petals 1.2-1.3 x 0.6-0.7 mm, white, oblong to obovate, apex retuse, margins entire, eciliate, glabrous. Stamens white, isomorphic; filaments 1.3-1.8 mm long, glabrous; connectives not dorsally thickened, but 0.5-0.8 mm prolonged below the thecae, unappendaged; anthers thecae ca. 0.6 mm long, oblong, with a large ventral opening, resembling a longitudinal slit, that comprises about half of the anther length, with a prominent and thick septum that gives the impression that there are two openings. Ovary 0.9-1 mm long, basally 1/2-2/3 adherent to the hypanthium, 3-celled and apparently with only 1 ovule in each locule, apex with sparse stipitate-stellate trichomes; style ca. 1.8 mm long, straight, not thickened at the apex and with a slight constriction below it, glabrous. Fruits not seen.
Habitat and Distribution: Miconia kollmannii has been collected in two localities only a few kilometers apart, in Montane Forests in central Espírito Santo at 750-950 m elevation. One of the collections was made in the "Reserva Biológica de Nova Lombardia", a federal government protected area.
Taxonomy and Systematics: Miconia kollmannii belongs to Miconia sect. Hypoxanthus (Rich. ex DC.) Hook.f. (former section Chaenanthera (Naudin) Cogn., following Goldenberg, 2000). Plants from this section may be recognized by the anthers dehiscing through broad, ventral pores that comprise about half the anther length or more (Goldenberg et al., 2003). This section apparently has two groups, one with long anthers on short connectives and the other, like M. kollmannii, has short anthers on long connectives. Among the species in this group, the most similar is Miconia chrysophylla (Rich.) Urb., which occurs from southern Mexico to the southern Amazon basin, reaching the Guyanas to the east. It has dense, sessile, lepidote trichomes on vegetative parts, inflorescences and the hypanthium, and also has 3-whorled leaves (seldom opposite), exclusively terminal inflorescences and a glabrous ovary, eventually with lepidote trichomes on the border between the ovary and hypanthium (Goldenberg, 2000). Miconia kollmannii differs from this species by the dendritic trichomes on leaves and hypanthium, and also by the opposite leaves, terminal inflorescences with additional axillary branches, and by the ovary with sparse stipitate-stellate trichomes. The other species in the group have different indument types on the abaxial leaf surface (Goldenberg, 2000): M. hypoleuca (Benth.) Triana has arachnoid cobweb-like trichomes that are densely matted and difficult to differentiate; M. dolichorrhyncha has sparser, long-armed dendritic trichomes.
Etymology: This species is named after Ludovic Kollmann (from Santa Teresa, Espírito Santo), the collector of the type specimen.
Description Author and Date: Renato Goldenberg, Oct. 2011, modified from original description, Goldenberg, R. & M. Reginato. 2007. Brittonia 59(4): 334-342.
Type: Brazil. Espírito Santo: Santa Teresa, Nova Lombardia, Reserva Biológica Augusto Ruschi, 28 Nov 2001 (fl), L. Kollmann et al. 5064 (holotype: MBML; isotype: UPCB).
Description: Shrub ca. 3 m high; young branches slightly flattened, along with the petioles densely covered by stipitate stellate-lepidote plus stellate trichomes. Leaves opposite; petioles 1-2.5 cm; blades 5.3-12 x 1.35-5 cm, elliptic to lanceate, apex acute to acuminate, base acute, margin entire to repand, chartaceous, longitudinal nerves 3 with a faint additional pair of marginals, acrodromous shortly supra-basal (inner pair up to 5 mm distant from the base), main veins prominent and transversal tenuous on abaxial surface, main veins impressed and transversal imperceptible on adaxial surface, discolorous, adaxial surface glabrous, abaxial densely covered by ochraceous to reddish, short stellate-stipitate and flat-topped trichomes (somewhat resembling a stipitate-lepidote one, but presenting branches on the axis, below the top), intermingled by a thick layer of canescent, stellate trichomes. Panicles 6-12 x 2.5-8 cm, terminal with additional axillary branches at the second leaf pair, the terminal ones consisting of three panicles (one central and two lateral, these developing more or less parallel to the leaf pair), each panicle lacking accessory branches, with 3-8 pairs of short paraclades, these with 1-2 pairs of 2nd order paraclades or with a terminal flower and successive dichasial branches and slightly congested (but not forming glomerules) and sometimes somewhat depauperate, suggesting a short scorpioid branching pattern; inflorescence branches densely covered with stellate and short stipitate-stellate trichomes; bracts 1.4-1.9 mm long, lanceate to linear and mostly caducous; bracteoles 0.7-1.4 mm long, linear, persistent. Flowers 4(-5)-merous, with a constriction at the base resembling a very short, 0.15 mm long, pedicel. Hypanthium 1.2-1.4 x ca. 1 mm, campanulate, inner surface glabrous, outer with the same trichomes described for the inflorescence, but a little sparser on the proximal half, torus glabrous. Calyx apparently persistent in young fruits, inner surface glabrous, outer with trichomes similar to the ones on the hypanthium, margin entire; tube ca. 0.2 mm high, lobes 0.2-0.3 mm long, triangular, acute, the dorsal teeth 0.1-0.2 mm long, acute, thick. Petals 1.2-1.3 x 0.6-0.7 mm, white, oblong to obovate, apex retuse, margins entire, eciliate, glabrous. Stamens white, isomorphic; filaments 1.3-1.8 mm long, glabrous; connectives not dorsally thickened, but 0.5-0.8 mm prolonged below the thecae, unappendaged; anthers thecae ca. 0.6 mm long, oblong, with a large ventral opening, resembling a longitudinal slit, that comprises about half of the anther length, with a prominent and thick septum that gives the impression that there are two openings. Ovary 0.9-1 mm long, basally 1/2-2/3 adherent to the hypanthium, 3-celled and apparently with only 1 ovule in each locule, apex with sparse stipitate-stellate trichomes; style ca. 1.8 mm long, straight, not thickened at the apex and with a slight constriction below it, glabrous. Fruits not seen.
Habitat and Distribution: Miconia kollmannii has been collected in two localities only a few kilometers apart, in Montane Forests in central Espírito Santo at 750-950 m elevation. One of the collections was made in the "Reserva Biológica de Nova Lombardia", a federal government protected area.
Taxonomy and Systematics: Miconia kollmannii belongs to Miconia sect. Hypoxanthus (Rich. ex DC.) Hook.f. (former section Chaenanthera (Naudin) Cogn., following Goldenberg, 2000). Plants from this section may be recognized by the anthers dehiscing through broad, ventral pores that comprise about half the anther length or more (Goldenberg et al., 2003). This section apparently has two groups, one with long anthers on short connectives and the other, like M. kollmannii, has short anthers on long connectives. Among the species in this group, the most similar is Miconia chrysophylla (Rich.) Urb., which occurs from southern Mexico to the southern Amazon basin, reaching the Guyanas to the east. It has dense, sessile, lepidote trichomes on vegetative parts, inflorescences and the hypanthium, and also has 3-whorled leaves (seldom opposite), exclusively terminal inflorescences and a glabrous ovary, eventually with lepidote trichomes on the border between the ovary and hypanthium (Goldenberg, 2000). Miconia kollmannii differs from this species by the dendritic trichomes on leaves and hypanthium, and also by the opposite leaves, terminal inflorescences with additional axillary branches, and by the ovary with sparse stipitate-stellate trichomes. The other species in the group have different indument types on the abaxial leaf surface (Goldenberg, 2000): M. hypoleuca (Benth.) Triana has arachnoid cobweb-like trichomes that are densely matted and difficult to differentiate; M. dolichorrhyncha has sparser, long-armed dendritic trichomes.
Etymology: This species is named after Ludovic Kollmann (from Santa Teresa, Espírito Santo), the collector of the type specimen.