Microtea tenuifolia
Microtea tenuifolia in Candolle, Prodr. 13(2): 18. 1849 sec. Sukhorukov & al. 20191 wfo-0001091520
- Lectotype (designated by Nowicke 1968: 3522): BRAZIL. Espírito Santo State, Pico d’Habira [Pico do Itabira], 1843, Claussen 392 (P00743993)
- 1. Sukhorukov, A. P., Sennikov, A.N., Nilova, M.V., Mazei, Y., Kushunina, M., Marchioretto, M.S. & Hanáček, P. 2019: Evolutionary relationships and taxonomy of Microtea (Microteaceae), a basal lineage in the core Caryophyllales. – PhytoKeys 115: 1-50.. https://doi.org/10.3897/phytokeys.115.29041, 2. Nowicke, J. W. 1968: Palynotaxonomic study of the Phytolaccaceae. – Annals of the Missouri Botanical Garden 55: 294-364 https://doi.org/10.2307/2395128
- =Microtea maypurensis var. angustifolia in Candolle, Prodr. 13(2): 18. 1849 syn. sec. Sukhorukov & al. 20193 wfo-0000453418
- Lectotype (designated by Sukhorukov & al. 2019: 44 (designated by Sennikov & Sukhorukov)4): BRAZIL. Jacobina Mountains in Bahia, 1836, Blanchet 2588 (P00798998)
- 3. Sukhorukov, A. P., Sennikov, A.N., Nilova, M.V., Mazei, Y., Kushunina, M., Marchioretto, M.S. & Hanáček, P. 2019: Evolutionary relationships and taxonomy of Microtea (Microteaceae), a basal lineage in the core Caryophyllales. – PhytoKeys 115: 1-50.. https://doi.org/10.3897/phytokeys.115.29041, 4. Sukhorukov, A. P., Sennikov, A.N., Nilova, M.V., Mazei, Y., Kushunina, M., Marchioretto, M.S. & Hanáček, P. 2019: Evolutionary relationships and taxonomy of Microtea (Microteaceae), a basal lineage in the core Caryophyllales. – PhytoKeys 115: 1-50 https://doi.org/10.3897/phytokeys.115.29041
Distribution (General)
Endemic to Eastern Brazil, found only in Bahia, Espírito Santo,
Minas Gerais and Rio de Janeiro States.A
Minas Gerais and Rio de Janeiro States.A
Description
Annual or short-lived perennial herb with several or numerous stems 10–40 cm high; leaves sessile (sometimes rosulate leaves shortly pedunculate), cuneate, 10–30 mm long and 0.3–3.0(5.0) mm wide; inflorescence a spike; pedicels 1.35–1.7(2.5) mm; flowers with a bract and two bracteoles, perianth segments 5, white, oblong; stamens 6–8, stigmas 3–5, thin; fruit 0.9–1.1 × 1.0–1.1 mm, equal to perianth or slightly protruding; pericarp smooth or with small and scattered tubercles, more or less reticulate, readily scraped off the seed; seed 0.9–1.1 mm, with rough surface.
We report for the first time that the perianth/fruit ratio is a useful distinguishing character for this species. Also, the number of stigmas can be useful in delimiting M. tenuifolia and similar forms of M. celosioides with narrower leaves. The character set of M. tenuifolia supports its close relationship to M. maypurensis, especially the forms with reduced pericarp outgrowths. Remarkably, Moquin-Tandon (1849) described a new variety of M. maypurensis (var. angustifolia Moq.) represented by two specimens of M. tenuifolia (P00743955! and P00798998!) and one specimen containing two individuals, M. tenuifolia and a narrow-leaved M. maypurensis (leg. Blanchet 2588, P00743954!). The figure of M. tenuifolia in Calió and Pirani (2006) showing the tuberculate perianth is rather an exception, and the individuals with pericarp lacking the outgrowths have so far been collected more frequently.A
We report for the first time that the perianth/fruit ratio is a useful distinguishing character for this species. Also, the number of stigmas can be useful in delimiting M. tenuifolia and similar forms of M. celosioides with narrower leaves. The character set of M. tenuifolia supports its close relationship to M. maypurensis, especially the forms with reduced pericarp outgrowths. Remarkably, Moquin-Tandon (1849) described a new variety of M. maypurensis (var. angustifolia Moq.) represented by two specimens of M. tenuifolia (P00743955! and P00798998!) and one specimen containing two individuals, M. tenuifolia and a narrow-leaved M. maypurensis (leg. Blanchet 2588, P00743954!). The figure of M. tenuifolia in Calió and Pirani (2006) showing the tuberculate perianth is rather an exception, and the individuals with pericarp lacking the outgrowths have so far been collected more frequently.A
Bibliography
A. Sukhorukov, A. P., Sennikov, A.N., Nilova, M.V., Mazei, Y., Kushunina, M., Marchioretto, M.S. & Hanáček, P. 2019: Evolutionary relationships and taxonomy of Microtea (Microteaceae), a basal lineage in the core Caryophyllales. – PhytoKeys 115: 1-50. https://doi.org/10.3897/phytokeys.115.29041