Monteiroa bullata (Ekman) Krapovickas (1951: 242)

1. Monteiroa bullata (Ekman) Krapovickas (1951: 242) View in CoL . ≡ Malvastrum bullatum Ekman (1913: 6–8) . Lectotype (first-step inadvertently designated by Krapovickas (1951); second-step designated here): BRAZIL. Santa Catarina. Calmon, in subpaludosis, 15 March 1910, P. Dusén 9331 (S-R-11222! #; isolectotypes S09-14850! #, NY barcode 00221845! #, F barcode 0062953F! #). Figures 1 View FIGURE 1 and 22 View FIGURE 22 .

Nomenclatural notes: — Krapovickas (1951) chose the collection of P. Dusén 9331 at S which cited in the protologue ( Ekman 1913). However, there are two specimens of this collection in S herbarium. Therefore, according to Art. 9.17, of the International Code of Nomenclature for algae, fungi, and plants (hereafter the ICN, Turland et al. 2018) a second step of lectotypification was necessary. The specimen S-R-11222 was chosen as lectotype because it is more representative, with the presence of fruits, and by the presence of a label with the determination of Ekman.

Taxonomic notes: —The species is characterized by: erect shrubs up to 4 m tall; young stems stellate-tomentose; presence of bullate and unlobed leaves, with obtuse base; adaxial surface of the leaves covered with sparse simple trichomes at the apex of the blisters and abaxial surface stellate-tomentose; calyx and epicalyx usually stellate-tomentose, not ciliate; epicalyx bracts lanceolate to ovate, rarely linear, 0.45–1.1 × 0.05–0.6 cm; corolla light pink to dark pink. See taxonomic notes of Monteiroa reitzii .

Distribution, habitat and conservation status: —This species occurs in Brazil ( Paraná, Santa Catarina and Rio Grande do Sul) ( Figure 2 View FIGURE 2 ), and grows in wetlands mainly of the Provincia Paranense ( Cabrera & Willink 1973), in the highland grasslands in contact with Araucaria forests , with some collections for the Provincia Pampeana, in southern Brazil. With the available records the species presents an EOO of 86,800.072 Km² and an AOO of 144 Km². Although it can be considered EN by the AOO, conditions B2[a, b, c] were not met. Therefore, the species is here considered Least Concern (LC). However, the situation of the species must be monitored, because the species occurs in very restricted areas, in general small swamps or on the edge of watercourses associated with highland grasslands which has suffered great losses in area due to conversion to crops in the State of Rio Grande do Sul, Brazil ( Andrade et al. 2015, Mapbiomas 2023).

Additional Specimens Examined: — BRAZIL. Paraná. Quatro Barras, Rio Bracajuvava, 950 m, 15 December 1964, G Hatschbach 12018 ( MBM). Rio Grande do Sul. Nova Petrópolis, Linha Imperial, antes do CTG Pousada da Serra , 680 m, 07 November 2010, M. Grings & G. M. Hennemann 1092 ( ICN, HUCS, FLOR) ; Viamão, Águas Claras, Banhado dos Pachecos, 19 October 2012, F. Schmidt-Silveira 405 ( ICN). Santa Catarina. Capão Alto, margem da BR-116, WGS 84 S 28.01213 W 050.54765, 905 m, 21 December 2018, M. Grings 1992 ( ICN) .