Taxon Details: Miconia karsticola Judd, Bécquer, Skean & Majure
Taxon Profile:
 | The Plant List |
 | International Plant Name Index |
 | Tropicos |
 | Catalogue of Life |
 | Global Biodiversity Information Facility |
 | JSTOR Types |
| JSTOR |
 | BHL |
 | Encyclopedia of Life |
 | WikiSpecies |
 | Google Scholar |
 | PubMed |
 | Morphbank |
 | IUCN |
 | National Center for Biotechnology Information |
 | Barcode of Life |
Narratives:
Family:
Melastomataceae (Magnoliophyta)
Melastomataceae (Magnoliophyta)
Scientific Name:
Miconia karsticola Judd, Bécquer, Skean & Majure
Miconia karsticola Judd, Bécquer, Skean & Majure
Primary Citation:
Taxonomic studies in the Miconieae (Melastomataceae). XII. Revision of Miconia sect. Miconiastrum, with emphasis on the Miconia bicolor complex
J. Bot. Res. Inst. Texas 8: 457--491. 2014
Taxonomic studies in the Miconieae (Melastomataceae). XII. Revision of Miconia sect. Miconiastrum, with emphasis on the Miconia bicolor complex
J. Bot. Res. Inst. Texas 8: 457--491. 2014
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Description:
Description Author and Date: Walter S. Judd, Eldis R. Bécquer Granados, James D. Skean Jr., and Lucas C. Majure modified from "Taxonomic studies in the Miconieae (Melastomataceae). XII. Revision of Miconia sect. Miconiastrum, with emphasis on the Miconia bicolor complex". Judd, Walter S., Bécquer Granados, Eldis R., Skean, James D., Jr., Majure, Lucas C.; J. Bot. Res. Inst. Texas. 8 (2): 457-491. 2014
Type: CUBA, Prov. Pinar del Río: S of Sumidero, Sierra Caliente, 15, 18 Aug 1915, fl, J. A. Shafer 13770 (HOLOTYPE: NY!; ISOTYPES: A on-line image #00072013!, CAS on-line image #0002427!, NY!, US!). Fig. 1C.
Description: Evergreen shrub up to 1 m. Young stems terete to slightly quadrangular, the indumentum of moderate, ferrugineous, globular-stellate hairs, without elongate, multicellular, non-glandular hairs, internodes 0.5–3 cm long, lacking longitudinal ridges, nodal line absent. Leaves isophyllous or nearly so; petiole 0.3–2 cm long, the indumentum of moderate, minute, ferrugineous, globular-stellate hairs; the blade 0.8–3.7 × 0.35–2 cm, ovate to elliptic or obovate, thinly coriaceous, the apex acute to obtuse or shortly acuminate, the base cuneate or obtuse to rounded, the margin plane, entire; secondary veins a single pair, conspicuous to inconspicuous, acrodromous, ± basal, the pair joining midvein at base to 1.5 mm above the leaf base, the secondary veins placed 0.5–3.5 mm in from margin, tertiary veins percurrent, oriented subperpendicular to midvein, 1–4.5 mm apart, obscure, the higher order veins also obscure, the midvein and secondary veins slightly impressed to flat, tertiary and higher order veins flat on adaxial surface; the midvein slightly to moderately raised, the secondary veins slightly raised to flat, the tertiary and higher order veins flat on abaxial surface; adaxial surface appearing slightly wrinkled after drying, with scattered druse crystals, and drying only slightly darker than the abaxial surface, the indumentum initially of scattered, ferrugineous, minute, globular-stellate hairs, but very quickly glabrescent; abaxial surface pale green, the surface smooth, with moderately scattered, ferrugineous, globular-stellate hairs, 0.02–0.08 mm across (appearing under low magnification as punctations), the veins with similar hairs, such hairs on lamina and veins persistent; mite domatia in axils of midvein and secondary veins, consisting of elongate, eglandular, smooth to slightly barbate, ± ferrugineous hairs, 0.1–0.5 mm long (often associated with a distinct depression in the leaf surface). Inflorescences terminal, a 1–3-flowered cyme, 1.3–3 cm long, 0.8–2 cm across, with no major branch pairs, the peduncle 0.4–1.7 cm long, the ultimate axes (pseudopedicels) 1.5–6 mm long, and flowers (when more than one present) well separated from each other; bracts 1.5–1.8 × 0.15–0.2 mm, narrowly triangular, with acute apex, deciduous; bracteoles 0.4–1 × 0.1–0.15 mm, narrowly triangular, with acute apex, ± deciduous. Flowers 5-merous, zygomorphic (due to positioning of the stamens), with pedicel 1.4–4 mm long. Hypanthium 2.8–3.5 mm long, terete and slightly flaring, not constricted above ovary, the free portion 1.5–1.7 mm long, 2.5–3 mm wide at the torus, the outer surface with sparse to moderate, minute, globular-stellate hairs, the internal surface ± smooth, glabrous. Calyx lobes 5, separate in bud, the tube 1–1.5 mm long, not or sometimes slightly tearing between lobes, with sparse minute, globular-stellate hairs abaxially, and glabrous adaxially, the lobes 0.2–0.4 × 1.5–3 mm, broadly triangular to nearly obsolete, the apex obtuse to rounded, with hairs similar to those of the tube but more sparsely distributed, green to red-tinged; calyx teeth present, 0.6–3 mm long, ± triangular to conic-terete, green to red, with acute apex, and hairs similar to those of calyx. Petals 5, 7–10 × 5–6.5 mm, asymmetrically obovate, spreading, white, glabrous but abaxial surface densely papillose-granulate, the apex rounded, sometimes slightly notched, the base slightly narrowed to a broad attachment, the margin entire. Stamens 10, isomorphic, ± geniculate near filament apex; staminal filament 4.7–5.3 mm long, glabrous, pale yellow, anther thecae 4.3–4.7 × ca. 1 mm, subulate, straight to slightly incurved, opening by a small dorso-apical pore, yellow, the connective not prolonged below the thecae, glabrous, but the filament emerging from slight depression in sterile, minutely dorso-lobed anther base. Ovary 3-locular, 1/2–2/3 inferior, globose to shortly ovoid, 2.5–3 mm long, 1.4–2.5 mm in diameter, apically conical to cylindric-conical, glabrous, the apex with small, ridged collar but lacking crown, with axile placentation, the ovules numerous, borne on small placenta; style 7–9.5 mm long, distally curved, white, glabrous; stigma punctate, minutely papillose, 0.1–0.2 mm wide. Berries 4–9 mm long, 4.5–9 mm in diameter, subglobose, purple-black, with scattered, minute, globular-stellate hairs, the hypanthium constricted, 2.5–3.3 mm wide at narrowest point and 2.5–3.7 mm wide at torus. Seeds 1–1.6 mm long, angular-obovoid, with ± rectangular raphe, the testa ± smooth; appendage absent.
Habitat and Distribution: Miconia karsticola is endemic to the vicinity of Sumidero in Pinar del Río, Cuba (Fig. 2), occurring in rocky areas and cliffs, at ca. 70 m, on limestone.
Phenology: This poorly collected species is only known in flower from May, August and November.
Taxonomy and Systematics: Miconia karsticola is easily distinguished from the other members of M. bicolor complex (within Miconia sect. Miconiastrum) by the characters presented in the key. It is especially distinctive because of its reduced inflorescences, flowers with short hypanthia, and small leaves, and these characters led to its being treated within the variable and polyphyletic genus Calycogonium. However, its constricted hypanthium/calyx in fruit, the leaves with mite domatia formed by clustered elongate, multicellular, eglandular, at least sometimes barbate hairs in the axils of the midvein and major secondary veins, five-merous flowers with 3-loculate gynoecia, abaxially granulose petals and seed features argue for a relationship with Miconia bicolor and its close relatives (in sect. Miconiastrum). A phylogenetic relationship with M. bicolor and relatives also is supported by DNA sequence data (Michelangeli et al., unpublished data). The new name, M. karsticola, is required because the epithet “saxicola” is already occupied in Miconia (i.e., M. saxicola Brandegee, a Mexican species). The epithet “karsticola” refers to the floristically diverse, karstic habitat of this species and also echoes the original specific epithet. The flora in the vicinity of Sumidero, in the Sierra de los Organos, is an important center of speciation, possessing ten local endemics (Borhidi and Muñiz 1986, Borhidi 1991). This species is considered vulnerable (VU) by Borhidi and Muñiz (1983) and included in this category in the Red List of Cuban Flora (Berazaín et al. 2005) due to its limited geographical range.
Description Author and Date: Walter S. Judd, Eldis R. Bécquer Granados, James D. Skean Jr., and Lucas C. Majure modified from "Taxonomic studies in the Miconieae (Melastomataceae). XII. Revision of Miconia sect. Miconiastrum, with emphasis on the Miconia bicolor complex". Judd, Walter S., Bécquer Granados, Eldis R., Skean, James D., Jr., Majure, Lucas C.; J. Bot. Res. Inst. Texas. 8 (2): 457-491. 2014
Type: CUBA, Prov. Pinar del Río: S of Sumidero, Sierra Caliente, 15, 18 Aug 1915, fl, J. A. Shafer 13770 (HOLOTYPE: NY!; ISOTYPES: A on-line image #00072013!, CAS on-line image #0002427!, NY!, US!). Fig. 1C.
Description: Evergreen shrub up to 1 m. Young stems terete to slightly quadrangular, the indumentum of moderate, ferrugineous, globular-stellate hairs, without elongate, multicellular, non-glandular hairs, internodes 0.5–3 cm long, lacking longitudinal ridges, nodal line absent. Leaves isophyllous or nearly so; petiole 0.3–2 cm long, the indumentum of moderate, minute, ferrugineous, globular-stellate hairs; the blade 0.8–3.7 × 0.35–2 cm, ovate to elliptic or obovate, thinly coriaceous, the apex acute to obtuse or shortly acuminate, the base cuneate or obtuse to rounded, the margin plane, entire; secondary veins a single pair, conspicuous to inconspicuous, acrodromous, ± basal, the pair joining midvein at base to 1.5 mm above the leaf base, the secondary veins placed 0.5–3.5 mm in from margin, tertiary veins percurrent, oriented subperpendicular to midvein, 1–4.5 mm apart, obscure, the higher order veins also obscure, the midvein and secondary veins slightly impressed to flat, tertiary and higher order veins flat on adaxial surface; the midvein slightly to moderately raised, the secondary veins slightly raised to flat, the tertiary and higher order veins flat on abaxial surface; adaxial surface appearing slightly wrinkled after drying, with scattered druse crystals, and drying only slightly darker than the abaxial surface, the indumentum initially of scattered, ferrugineous, minute, globular-stellate hairs, but very quickly glabrescent; abaxial surface pale green, the surface smooth, with moderately scattered, ferrugineous, globular-stellate hairs, 0.02–0.08 mm across (appearing under low magnification as punctations), the veins with similar hairs, such hairs on lamina and veins persistent; mite domatia in axils of midvein and secondary veins, consisting of elongate, eglandular, smooth to slightly barbate, ± ferrugineous hairs, 0.1–0.5 mm long (often associated with a distinct depression in the leaf surface). Inflorescences terminal, a 1–3-flowered cyme, 1.3–3 cm long, 0.8–2 cm across, with no major branch pairs, the peduncle 0.4–1.7 cm long, the ultimate axes (pseudopedicels) 1.5–6 mm long, and flowers (when more than one present) well separated from each other; bracts 1.5–1.8 × 0.15–0.2 mm, narrowly triangular, with acute apex, deciduous; bracteoles 0.4–1 × 0.1–0.15 mm, narrowly triangular, with acute apex, ± deciduous. Flowers 5-merous, zygomorphic (due to positioning of the stamens), with pedicel 1.4–4 mm long. Hypanthium 2.8–3.5 mm long, terete and slightly flaring, not constricted above ovary, the free portion 1.5–1.7 mm long, 2.5–3 mm wide at the torus, the outer surface with sparse to moderate, minute, globular-stellate hairs, the internal surface ± smooth, glabrous. Calyx lobes 5, separate in bud, the tube 1–1.5 mm long, not or sometimes slightly tearing between lobes, with sparse minute, globular-stellate hairs abaxially, and glabrous adaxially, the lobes 0.2–0.4 × 1.5–3 mm, broadly triangular to nearly obsolete, the apex obtuse to rounded, with hairs similar to those of the tube but more sparsely distributed, green to red-tinged; calyx teeth present, 0.6–3 mm long, ± triangular to conic-terete, green to red, with acute apex, and hairs similar to those of calyx. Petals 5, 7–10 × 5–6.5 mm, asymmetrically obovate, spreading, white, glabrous but abaxial surface densely papillose-granulate, the apex rounded, sometimes slightly notched, the base slightly narrowed to a broad attachment, the margin entire. Stamens 10, isomorphic, ± geniculate near filament apex; staminal filament 4.7–5.3 mm long, glabrous, pale yellow, anther thecae 4.3–4.7 × ca. 1 mm, subulate, straight to slightly incurved, opening by a small dorso-apical pore, yellow, the connective not prolonged below the thecae, glabrous, but the filament emerging from slight depression in sterile, minutely dorso-lobed anther base. Ovary 3-locular, 1/2–2/3 inferior, globose to shortly ovoid, 2.5–3 mm long, 1.4–2.5 mm in diameter, apically conical to cylindric-conical, glabrous, the apex with small, ridged collar but lacking crown, with axile placentation, the ovules numerous, borne on small placenta; style 7–9.5 mm long, distally curved, white, glabrous; stigma punctate, minutely papillose, 0.1–0.2 mm wide. Berries 4–9 mm long, 4.5–9 mm in diameter, subglobose, purple-black, with scattered, minute, globular-stellate hairs, the hypanthium constricted, 2.5–3.3 mm wide at narrowest point and 2.5–3.7 mm wide at torus. Seeds 1–1.6 mm long, angular-obovoid, with ± rectangular raphe, the testa ± smooth; appendage absent.
Habitat and Distribution: Miconia karsticola is endemic to the vicinity of Sumidero in Pinar del Río, Cuba (Fig. 2), occurring in rocky areas and cliffs, at ca. 70 m, on limestone.
Phenology: This poorly collected species is only known in flower from May, August and November.
Taxonomy and Systematics: Miconia karsticola is easily distinguished from the other members of M. bicolor complex (within Miconia sect. Miconiastrum) by the characters presented in the key. It is especially distinctive because of its reduced inflorescences, flowers with short hypanthia, and small leaves, and these characters led to its being treated within the variable and polyphyletic genus Calycogonium. However, its constricted hypanthium/calyx in fruit, the leaves with mite domatia formed by clustered elongate, multicellular, eglandular, at least sometimes barbate hairs in the axils of the midvein and major secondary veins, five-merous flowers with 3-loculate gynoecia, abaxially granulose petals and seed features argue for a relationship with Miconia bicolor and its close relatives (in sect. Miconiastrum). A phylogenetic relationship with M. bicolor and relatives also is supported by DNA sequence data (Michelangeli et al., unpublished data). The new name, M. karsticola, is required because the epithet “saxicola” is already occupied in Miconia (i.e., M. saxicola Brandegee, a Mexican species). The epithet “karsticola” refers to the floristically diverse, karstic habitat of this species and also echoes the original specific epithet. The flora in the vicinity of Sumidero, in the Sierra de los Organos, is an important center of speciation, possessing ten local endemics (Borhidi and Muñiz 1986, Borhidi 1991). This species is considered vulnerable (VU) by Borhidi and Muñiz (1983) and included in this category in the Red List of Cuban Flora (Berazaín et al. 2005) due to its limited geographical range.