Taxon Details: Tococa undabunda J.F.Macbr.
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Narratives:
Family:
Melastomataceae (Magnoliophyta)
Melastomataceae (Magnoliophyta)
Scientific Name:
Tococa undabunda J.F.Macbr.
Tococa undabunda J.F.Macbr.
Primary Citation:
Publ. Field Columb. Mus., Bot. Ser. 4: 177. 1929
Publ. Field Columb. Mus., Bot. Ser. 4: 177. 1929
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Description:
Description Author and Date: Fabian A. Michelangeli, January 2010, based on Michelangeli, F. A. (2005). Tococa (Melastomataceae). Flora Neotropica Monographs 98: 1-114.
Type: Peru. Junín: La Merced, Hacienda Schunke, 27 AUG- 1 SEP 1923, Macbride 5734 (holotype F; isotype K, NY).
Description: Shrub up to 1.5 m. Stems and petioles pubescenst, the trichomes glandular, up to 4 mm long. Petioles 2-4 cm; leaves slightly anysophyllous, 18-25 x 10-13 cm, 5-nervate, membranaceous, elliptic to ovate, base round to obtuse, apex shortly accuminate to caudate; domatia present, fusiform 1.2-1.7 x 0.7-1.1 cm, the apical 1/3 to 1/5 immersed in the lamina. Inflorescence terminal, highly reduced, resembling a capitulum with 20-35 sessile flowers, bracteoles absent. Hypanthium 5 mm long, puberulent; calyx teeth reduced over the sepals; sepalsovate up to 4 mm long, pubescent; petals 5, white. Anthers 10, all of the same size, the blunt reduced dorsal connective tooth present; ovary partly inferior; style glabrous, stigma capitate.
Taxonomy and Systematics: Tococa undabunda is known only from the type. Macbride, suggested that this species could be related to T. racemifera, based on the domatia, which are fusiform and partially immersed in the lamina. The compressed and capitate inflorescence resembles that of T. capitata, although T. undabunda lacks the characteristic bracteoles of T. capitata. However, leaf shape and pubescence as well as the overall morphology of the hypanthium and calyx resemble that of T. guianensis and closely related species. In fact, the similarities in floral characters is such that it may only be a form of T. guianensis with compressed inflorescences. Without more material it is difficult to assess the real status of this taxon, given that some specimens of T. guianensis present inflorescences with different levels of compression and reduction of the different axes.
Description Author and Date: Fabian A. Michelangeli, January 2010, based on Michelangeli, F. A. (2005). Tococa (Melastomataceae). Flora Neotropica Monographs 98: 1-114.
Type: Peru. Junín: La Merced, Hacienda Schunke, 27 AUG- 1 SEP 1923, Macbride 5734 (holotype F; isotype K, NY).
Description: Shrub up to 1.5 m. Stems and petioles pubescenst, the trichomes glandular, up to 4 mm long. Petioles 2-4 cm; leaves slightly anysophyllous, 18-25 x 10-13 cm, 5-nervate, membranaceous, elliptic to ovate, base round to obtuse, apex shortly accuminate to caudate; domatia present, fusiform 1.2-1.7 x 0.7-1.1 cm, the apical 1/3 to 1/5 immersed in the lamina. Inflorescence terminal, highly reduced, resembling a capitulum with 20-35 sessile flowers, bracteoles absent. Hypanthium 5 mm long, puberulent; calyx teeth reduced over the sepals; sepalsovate up to 4 mm long, pubescent; petals 5, white. Anthers 10, all of the same size, the blunt reduced dorsal connective tooth present; ovary partly inferior; style glabrous, stigma capitate.
Taxonomy and Systematics: Tococa undabunda is known only from the type. Macbride, suggested that this species could be related to T. racemifera, based on the domatia, which are fusiform and partially immersed in the lamina. The compressed and capitate inflorescence resembles that of T. capitata, although T. undabunda lacks the characteristic bracteoles of T. capitata. However, leaf shape and pubescence as well as the overall morphology of the hypanthium and calyx resemble that of T. guianensis and closely related species. In fact, the similarities in floral characters is such that it may only be a form of T. guianensis with compressed inflorescences. Without more material it is difficult to assess the real status of this taxon, given that some specimens of T. guianensis present inflorescences with different levels of compression and reduction of the different axes.
Flora and Monograph Treatment(s):
Tococa undabunda J.F.Macbr.: [Article] Michelangeli, Fabián A. 2005. (Melastomataceae). Fl. Neotrop. Monogr. 98: 1-114.
Tococa undabunda J.F.Macbr.: [Article] Michelangeli, Fabián A. 2005.