M. papillosa M.S.Marchioretto & J.C.de Siqueira, Pesquisas, Botanica 48: 30 (1998).

Sukhorukov, Alexander P., Sennikov, Alexander N., Nilova, Maya V., Mazei, Yuri, Kushunina, Maria, Marchioretto, Maria Salete & Hanacek, Pavel, 2019, Evolutionary relationships and taxonomy of Microtea (Microteaceae), a basal lineage in the core Caryophyllales, PhytoKeys 115, pp. 1-50 : 21

3. M. papillosa M.S.Marchioretto & J.C.de Siqueira, Pesquisas, Botanica 48: 30 (1998).

Holotype.

BRAZIL. Minas Gerais, Estrada Conselheiro Mata, a 2 km do asfalto, Diamantina, 11 April 1982, L. Rossi, A. Furlan, N.L. Menezes, N. Hensold, H.L. Wagner & E.M. Isejima 3317 (PACA!).

Description.

Perennial with a taproot or rarely annual (?) herb with caudex; stems erect, densely covered with short papillae; leaves papillate, oblong or lanceolate, appressed or somewhat spreading, cuneate, 2.0-4.0 cm long and 0.2-0.7 cm wide; inflorescence a spike; flowers subsessile, with the pedicels 0.25-0.5 mm long, with a bract and two bracteoles; perianth segments 5, oblong, greenish; stamens 6-8; stigmas 2, thick; fruit 1.1-1.25 × 0.9-1.1 mm, with short finger-shaped outgrowths (Fig. 5A, B ); seed 0.9-1.0 mm, with rough surface (Fig. 5D ). Morphologically, this species is most similar to M. celosioides and is distinguished by the papillate stems and leaves.

Habitat.

Sandy substrates at altitudes 500-1400 m a.s.l.

Distribution.

(Fig. 16 ) Endemic to Minas Gerais (Diamantina Mun.), Brazil.

Specimens examined.

BRAZIL. Minas Gerais: Diamantina Mun., Estrada Conselheiro Mata, a 2 km do asfalto, 11 Apr 1982, L. Rossi et al. 3322 (PACA); N of Grão Mogol, 900-1000 m, 27 Nov 1984, R.M. Harley et al. 36121 & 37090 (K); 15 km from Diamantina towards Mendanha, 2 Dec 1984, B. Stannard et al. 36280 (K); Itacambira, 1220 m, 11 Nov 1988, J.R. Pirani et al. 2272 (K); 5 km W de Diamantina, 1200 m, 16 Feb 1991, M.M. Arbo et al. 5220 (K); Diamantina Mun., 14 km from Diamantina, 30 Jan 2000, R.C. Forzza & R. Mello-Silva 1486 (G, K).

Figures

Figure 5. Fruits and seeds of Microtea papillosa and M. scabrida: A, B fruit of M. papillosa, enclosed in the perianth (Diamantina Mun., Estrada Conselheiro Mata, 11 Apr 1982, L. Rossi et al. 3322, PACA) C, D seed of M. papillosa (Diamantina Mun., Estrada Conselheiro Mata, 11 Apr 1982, L. Rossi et al. 3322, PACA) E, F fruit of M. scabrida, enclosed in the perianth (Paraguay, Alto Parana, 1909, K. Fiebrig 5468, M) G, H seed of M. scabrida (Paraguay, Alto Parana, 1909, K. Fiebrig 5468, M). Magnification: A, E - 30 x, B, F - 100 x, C, G - 50 x, D, H - 300 x.

Figure 16. Distribution map of Microtea papillosa.