Taxon Details: Ossaea suprabasalis R.Goldenb. & Reginato
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Narratives:
Family:
Melastomataceae (Magnoliophyta)
Melastomataceae (Magnoliophyta)
Scientific Name:
Ossaea suprabasalis R.Goldenb. & Reginato
Ossaea suprabasalis R.Goldenb. & Reginato
Primary Citation:
Three new species of Melastomataceae from the southeastern Atlantic Forest of Brazil.
Brittonia 59(4): 339. 2007
Three new species of Melastomataceae from the southeastern Atlantic Forest of Brazil.
Brittonia 59(4): 339. 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, Valsugana Velha, E. Biológica de Santa Lúcia, Trilha do Sagüi, 17 Nov 1993 (fl), L. D. Thomaz 857 (holotype: MBML; isotype: UPCB).
Description: Shrub 1-3 m high; branches, petioles, leaf surfaces, inflorescences, bracts and bracteoles glabrous or sparsely covered by sessile glandular bodies, these denser on the nodes. Leaves opposite; petioles 0.9-3 cm long; blades 4.4-14.5 x 1.5-6 cm, elliptic to oboval-elliptic, apex acuminate to shortly caudate, base acute to cuneate or decurrent, margin entire, shortly (0.2-0.3 mm) ciliate, membranaceous, discolorous in dried materials, longitudinal nerves 3, acrodromous, supra-basal with a faint additional pair of marginals, main and transversal veins and reticulation prominent on the abaxial surface and slightly prominent on the adaxial surface. Thyrses 2.3-4.6 x 1.3-3.4 cm, axillary, pauciflorous (4-15-flowered), without accessory branches, with 2-5 pairs of opposite paraclades, these usually dichasial, but sometimes depauperate; bracts 0.85-2.15 mm, lanceolate, entire; bracteoles two, 0.55- 0.8 mm long, lanceolate, entire. Flowers 4-5-merous, on pedicels 0.6-1.5 mm long. Hypanthium 2.3-2.9 x 1.8-2.5 mm, campanulate, outside densely covered by very small (up to 0.1 mm), simple, segmented trichomes (mostly inconspicuous in dry material), internal surface glabrous but the torus with very sparse, simple trichomes. Calyx tube ca. 0.5 mm long; lobes 0.4-1.2 mm long, triangular to lanceolate, acute, both tube and lobes outside with the same trichomes described for the hypanthium; external teeth 0.5-1.1 mm long, almost equaling the lobes, lanceolate, acute to shortly subulate. Petals 2-2.5 x 1.1-1.2 mm, white, triangular to lanceolate, acute, entire, eciliate, glabrous. Stamens white, isomorphic, glabrous; filaments 1-1.6 mm long; connectives unappendaged or sometimes dorsally tuberculate, dorsally thickened at the base and ventrally produced just below and continuously to the anthers; anthers 1.5-1.7 mm long, oblong, apex rounded with one dorsal pore. Ovary 1.4-1.7 mm long, basally 0.7-1 mm adherent to the hypanthium, 3-celled, apex with sparse sessile glandular bodies; style 4.4-4.6 mm long, linear, glabrous. Berries 5.8-8.15 x 5.8-8.15 mm, dark violet; seeds ca. 1 x 0.5 mm.
Habitat and Distribution: Ossaea suprabasalis occurs in montane forests in central Espírito Santo, from 650 to 850 m elevation, both in protected public sites and in private areas.
Phenology: The plants were collected with flowers from October to December, and with fruits from December to March.
Taxonomy and Systematics: Ossaea suprabasalis has been placed here in Ossaea, due to its petal shape and inflorescence position, but the most closely related species might be a Clidemia. These genera have been traditionally distinguished based only on the shape of the petals, which are acute to acuminate in Ossaea, and rounded, truncate or emarginate in Clidemia (Cogniaux, 1886-1888; Cogniaux, 1891). This new Ossaea also resembles Leandra, and they have been traditionally recognized based only on inflorescence position, that is lateral in Ossaea and terminal in Leandra, despite the fact that Leandra sect. Chaetodon Cogn. may have pseudo-lateral inflorescences. Recent works on phylogeny of Miconieae suggest that the distinctions among Ossaea, Clidemia and Leandra are artificial, and that the above cited characters may be shared by non-related groups within the tribe (Michelangeli et al., 2004). Major generic rearrangements will be necessary in the future, once more complete phylogenies are produced. Ossaea suprabasalis and Clidemia capilliflora (Naudin) Cogn. share the same habit, and both have membranaceous, ciliate leaves with 3 main nerves plus a faint, marginal pair, being either glabrous or with branches and leaves sparsely to moderately covered with sessile glandular bodies. Both differ because the former has leaves with strongly supra-basal nerves (the inner pair joining the midrib 2.7-21.3 mm above the base), thyrsoid inflorescences, calyx lobes and teeth nearly equal in size, and acute petals. Clidemia capilliflora has basal-nerved to slightly supra-basal (up to 4 mm above the base) leaves, dichasial inflorescences, calyx with external teeth more than 2 times longer than the lobes, and obtuse petals. Ossaea suprabasalis is also similar to Ossaea cinnamomifolia (Naudin) Triana, based on the slender inflorescences and glabrescent branches and leaves (except for the sessile glandular bodies in O. suprabasalis). Both differ because the former species has membranaceous, ciliate and 3-plinerved leaves, a hypanthium without glandular trichomes, glabrous petals, isomorphic stamens, a glabrescent ovary, and glabrous fruits. Ossaea cinnamomifolia has coriaceous, eciliate, 5-plinerved leaves, hypanthium with glandular trichomes, glandular-furfuraceous petals, slightly dimorphic stamens, and furfuraceous ovary and fruits (Souza, 1997; 2002). In Leandra sect. Chaetodon, L. limbata Cogn. has inflorescences somewhat similar to O. suprabasalis, but the leaves have trichomes on both surfaces, and the hypanthium is covered by both setulose and stellate trichomes (Cogniaux, 1886-1888). Other species in this section may be related do O. suprabasalis, like L. ossaeoides (Naudin) Cogn., L. sphaerocarpa Cogn. , L. subtrinervis Cogn., L. dolichodon Cogn. and L. penduliflora Cogn., but all differ from it by indument, leaf margins, pedicels, and calyx morphology.
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, Valsugana Velha, E. Biológica de Santa Lúcia, Trilha do Sagüi, 17 Nov 1993 (fl), L. D. Thomaz 857 (holotype: MBML; isotype: UPCB).
Description: Shrub 1-3 m high; branches, petioles, leaf surfaces, inflorescences, bracts and bracteoles glabrous or sparsely covered by sessile glandular bodies, these denser on the nodes. Leaves opposite; petioles 0.9-3 cm long; blades 4.4-14.5 x 1.5-6 cm, elliptic to oboval-elliptic, apex acuminate to shortly caudate, base acute to cuneate or decurrent, margin entire, shortly (0.2-0.3 mm) ciliate, membranaceous, discolorous in dried materials, longitudinal nerves 3, acrodromous, supra-basal with a faint additional pair of marginals, main and transversal veins and reticulation prominent on the abaxial surface and slightly prominent on the adaxial surface. Thyrses 2.3-4.6 x 1.3-3.4 cm, axillary, pauciflorous (4-15-flowered), without accessory branches, with 2-5 pairs of opposite paraclades, these usually dichasial, but sometimes depauperate; bracts 0.85-2.15 mm, lanceolate, entire; bracteoles two, 0.55- 0.8 mm long, lanceolate, entire. Flowers 4-5-merous, on pedicels 0.6-1.5 mm long. Hypanthium 2.3-2.9 x 1.8-2.5 mm, campanulate, outside densely covered by very small (up to 0.1 mm), simple, segmented trichomes (mostly inconspicuous in dry material), internal surface glabrous but the torus with very sparse, simple trichomes. Calyx tube ca. 0.5 mm long; lobes 0.4-1.2 mm long, triangular to lanceolate, acute, both tube and lobes outside with the same trichomes described for the hypanthium; external teeth 0.5-1.1 mm long, almost equaling the lobes, lanceolate, acute to shortly subulate. Petals 2-2.5 x 1.1-1.2 mm, white, triangular to lanceolate, acute, entire, eciliate, glabrous. Stamens white, isomorphic, glabrous; filaments 1-1.6 mm long; connectives unappendaged or sometimes dorsally tuberculate, dorsally thickened at the base and ventrally produced just below and continuously to the anthers; anthers 1.5-1.7 mm long, oblong, apex rounded with one dorsal pore. Ovary 1.4-1.7 mm long, basally 0.7-1 mm adherent to the hypanthium, 3-celled, apex with sparse sessile glandular bodies; style 4.4-4.6 mm long, linear, glabrous. Berries 5.8-8.15 x 5.8-8.15 mm, dark violet; seeds ca. 1 x 0.5 mm.
Habitat and Distribution: Ossaea suprabasalis occurs in montane forests in central Espírito Santo, from 650 to 850 m elevation, both in protected public sites and in private areas.
Phenology: The plants were collected with flowers from October to December, and with fruits from December to March.
Taxonomy and Systematics: Ossaea suprabasalis has been placed here in Ossaea, due to its petal shape and inflorescence position, but the most closely related species might be a Clidemia. These genera have been traditionally distinguished based only on the shape of the petals, which are acute to acuminate in Ossaea, and rounded, truncate or emarginate in Clidemia (Cogniaux, 1886-1888; Cogniaux, 1891). This new Ossaea also resembles Leandra, and they have been traditionally recognized based only on inflorescence position, that is lateral in Ossaea and terminal in Leandra, despite the fact that Leandra sect. Chaetodon Cogn. may have pseudo-lateral inflorescences. Recent works on phylogeny of Miconieae suggest that the distinctions among Ossaea, Clidemia and Leandra are artificial, and that the above cited characters may be shared by non-related groups within the tribe (Michelangeli et al., 2004). Major generic rearrangements will be necessary in the future, once more complete phylogenies are produced. Ossaea suprabasalis and Clidemia capilliflora (Naudin) Cogn. share the same habit, and both have membranaceous, ciliate leaves with 3 main nerves plus a faint, marginal pair, being either glabrous or with branches and leaves sparsely to moderately covered with sessile glandular bodies. Both differ because the former has leaves with strongly supra-basal nerves (the inner pair joining the midrib 2.7-21.3 mm above the base), thyrsoid inflorescences, calyx lobes and teeth nearly equal in size, and acute petals. Clidemia capilliflora has basal-nerved to slightly supra-basal (up to 4 mm above the base) leaves, dichasial inflorescences, calyx with external teeth more than 2 times longer than the lobes, and obtuse petals. Ossaea suprabasalis is also similar to Ossaea cinnamomifolia (Naudin) Triana, based on the slender inflorescences and glabrescent branches and leaves (except for the sessile glandular bodies in O. suprabasalis). Both differ because the former species has membranaceous, ciliate and 3-plinerved leaves, a hypanthium without glandular trichomes, glabrous petals, isomorphic stamens, a glabrescent ovary, and glabrous fruits. Ossaea cinnamomifolia has coriaceous, eciliate, 5-plinerved leaves, hypanthium with glandular trichomes, glandular-furfuraceous petals, slightly dimorphic stamens, and furfuraceous ovary and fruits (Souza, 1997; 2002). In Leandra sect. Chaetodon, L. limbata Cogn. has inflorescences somewhat similar to O. suprabasalis, but the leaves have trichomes on both surfaces, and the hypanthium is covered by both setulose and stellate trichomes (Cogniaux, 1886-1888). Other species in this section may be related do O. suprabasalis, like L. ossaeoides (Naudin) Cogn., L. sphaerocarpa Cogn. , L. subtrinervis Cogn., L. dolichodon Cogn. and L. penduliflora Cogn., but all differ from it by indument, leaf margins, pedicels, and calyx morphology.