Sida ramoniana Krapovickas (2014:104)

Grings, Martin & Boldrini, Ilsi Iob, 2022, Synopsis of Sida (Malvoideae, Malvaceae) in the state of Rio Grande do Sul, Brazil, Phytotaxa 542 (2), pp. 105-135 : 120

14. Sida ramoniana Krapovickas (2014:104) ( Figures 7F–I , 8 ).

Holotype:— ARGENTINA. Misiones : Dep. Oberá., “Arroyo Ramón, 5 km E de ruta nac. 14 y acceso a ciudad de Oberá”, 27º27’56,4”S- 55º02’08,4”W, 269 m, bañado, 16 February 2012, H. A. Keller & N. G. Paredes 10825 ( CTES, isotypes FCQ, K, LIL, MBM, MO, NY!, SI).

Taxonomic notes: — Sida ramoniana can be distinguished from other species of section Sidae ( Table 1 ) by its axillary flowers solitary or in glomerules, pubescent leaves, pedicel and calyx with simple trichomes, muticous or submuticous mericarps, and simple trichomes at the nerves of the abaxial surface of leaves ( Figure 7F–I ) ( Krapovickas 2014).

Distribution, habitat and conservation status: —The species was known only from the type locality in Oberá, Misiones, Argentina ( Krapovickas 2014) . In the present work, its distribution area is expanded with the first record of the species to Brazil, where the species was found only in one locality in the state of Rio Grande do Sul, in Aristida grassland ( Figure 8 ). It was not possible to calculate the EOO of the species because it is known from only two locations. The AOO of the species is 8 Km², allied to the fact that its habitat is showing a great loss of area ( Andrade et al. 2015), in addition to invasion by exotic species, the species is here considered Critically Endangered (CR), criterion B2ab(iii, v)c(iv).

Representative specimens: — BRAZIL. Rio Grande do Sul. Giruá, Granja Sodal , March 1964, K . Hagelund 2228 ( HAS) .

Figures

FIGURE 7. A–E. Sida potentilloides. A. Flower. Adaxial surface of leaf. C. Abaxial surface of leaf. D. Branch with leaves, immature schizocarps and flower bud. E. Branch with leaves and mature schizocarps. F–J. Sida ramoniana. F. Abaxial surface of leaf indument. G. Calyx basis indument tomentose. H. Stem indument pubescent. I. Margin of leaf dentate-crenate. J–O. Sida reitzii. J. Habit. K. Schizocarps in terminal glomerules. L. Adaxial surface of leaf. M. Abaxial surface of leaf. N. Flower. O. Branch. Photographs A–I by Martin Grings (F–J from K. Hagelund 2228, HAS) and J–O by Luís Funez.

FIGURE 8. Distribution map of Sida riedelii, S. ramoniana, S. regnellii, S. reitzii and S. tuberculata in Rio Grande do Sul state, Brazil.