Sida ulmifolia Miller (1768

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 : 223

23. Sida ulmifolia Miller (1768 : Sida no. 1) ( Figs. 6F – G , 7B ). Type:—UNKNOWN LOCALITY. Without date, Miller herb., specimen no 1 (holotype, BM 000939054, photo!).

Taxonomic notes: — Sida ulmifolia belongs to Sida sect. Distichifolia ( Krapovickas 2014) by the following morphological features: Stem and branches covered with minute stellate trichomes; leaves with appressed and antrorse simple trichomes on the adaxial surface, and minute stellate trichomes on the abaxial surface; depauperate axillary inflorescences with 1–2 flowers; staminal tube with simple trichomes, and mericarps 8–10, blackish and short-aristate. It’s also closely related to S. glomerata , but can be distinguished by the trichome morphology of its leaves, calyx and pedicel, inflorescence type in the axils, and number and morphology of the mericarps. It is often reported in the literature as Sida acuta or Sida carpinifolia .

Distribution and habitat: —This species is Indo-Pacific and American in distribution ( Krapovickas 2014). In the Americas, S. ulmifolia is known from southern United States and Mexico to the Caribbean and northern South America, from Colombia to north and northeast Brazil. In Pernambuco, the species has been recorded growing in small populations and on sandy soils from Littoral to Mata , in disturbed areas of forests and plantations, and at the Archipelago of Fernando de Noronha.

Representative specimen: — BRAZIL. Pernambuco. São Lourenço da Mata, Engenho São Bento , 15 April 1967, A. Krapovickas 12869 (CTES).

Figures

FIGURE 6. A–C: Sida spinosa. A: flower; B: schizocarp with mature mericarps; C: tubercles present on stem at the base of petioles. D: Sida ulei, flower. E: Sida urens, flower in glomerule. F–G: Sida ulmifolia. F: flower and leaves; G: schizocarp with mature mericarps. Photos: G.S. Baracho.

FIGURE 7. A–B: Distribution maps of Sida species in the State of Pernambuco, Brazil. A: Sida pernambucensis (Ì); S. planicaulis (|); S. rhombifolia var. rhombifolia (Ɨ); S. salviifolia (D); S. santaremensis (Î); S. setosa (Δ). B: Sida spinosa (z); S. tuberculata var. pseudo-rhombifolia (|); S. uchoae (Ɨ); S. ulei (D); S. ulmifolia (Î); S. urens (Δ).