Sida brittonii

Brandão, José Lourenço, Baracho, George Sidney, Sales, Margareth Ferreira De & Filho, Marcelo Paulino Viegas, 2017, Synopsis of Sida (Malvaceae, Malvoideae, Malveae) in the state of Pernambuco, Brazil, Phytotaxa 307 (3), pp. 205-227 : 210-211

4. Sida brittonii León (1919: 172) ( Figs. 1E – F , 4A ). Lectotype (designated by Areces & Fryxell 2007: 175):— CUBA. Pinar del Río: dry savanna, Chirigota, 9 August 1917, Bro. León & P. Roca 7466 (HAC, n.v.; isolectotype, US, photo!).

Taxonomic notes: — Sida brittonii is placed in Sida sect. Malacroideae ( Don 1831) based on the following combination of characters: prostrate herbs, stems with stellate trichomes not appressed; upper surface with simple trichomes; leaf blades 0.4–1.4 × 0.2–0.6 cm, oblong to obovate, upper surface covered with simple trichomes, rarely stellate; and mericarps 5, covered with glandular trichomes, not glochidate. It’s also closely related to S. ciliaris , but can be distinguished by the stem by the non-appressed trichomes, upper surface with simple trichomes, mericarps uniformly 5 and not glochidate.

Distribution and habitat: — Sida brittonii is distributed in Cuba, Venezuela and Northeast Brazil ( Krapovickas 2007). It was previously restricted to the Northeastern Brazil, from Piauí to Alagoas. It is reported here for the first time in the State of Pernambuco, occurring from Littoral to Caatinga, and grows in populations along disturbed secondary forests, at roadsides, extending their range of distribution to semiarid areas, in sandy soils of caatinga fragments.

Representative specimen: — BRAZIL. Pernambuco. Cabo de Santo Agostinho, Praia do Paiva, 7 April 1998, fr.,

A. Sacramento 331 (IPA).

Figures

FIGURE 1. A: Sida abutilifolia, flower and leaf. B–C: Sida acuta. B: habit; C: flower and leaf. D: Sida angustissima, flower and leaf. E–F: Sida brittonii. E: flower; F: flower bud and leaves. G–H: Sida cerradoensis. G: habit; H: flower. Photos: G.S. Baracho.

FIGURE 4. A–B: Distribution maps of Sida species in the State of Pernambuco, Brazil. A: Sida abutilifolia (Î); S. acuta (z); S. angustissima (|); S. brittonii (Ɨ); S. cerradoensis (D); S. harleyi (Δ). B: Sida cordifolia (Î); S. galheirensis (z); S. glomerata (|); S. glutinosa (Ɨ); S. jussiaeana (D); S. linifolia (Δ).