Sida urens Linnaeus (1759: 1145)

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

24. Sida urens Linnaeus (1759: 1145) ( Figs. 6E , 7B ). Lectotype (designated by Rodrigo 1944: t. 17):— JAMAICA. Browne s.n., Herb. Linnaeus 866.20 (LINN, photo!).

Taxonomic notes: — Sida urens is placed in Sida subsect. Conglomerata ( Fryxell 2009) due to the distinctive characters which include: stems and leaves hirsute covered with long simple trichomes, 5–7 mm long, mixed with bifurcate and scattered short stellate trichomes; leaf blades narrow to broadly oval-cordate, with simple, bifurcate, and stellate trichomes on both surfaces, the lower surface with more dense stellate trichomes; flowers and fruits crowded in subsessile axillary and terminal glomerules or, sometimes, solitary, subsessile to shortly pedicellate, the pedicels up to 5 mm long, not articulate; calyx obtrullate to rhombic, hirsute, ciliate sepals; corolla yellowish, orange or salmon, with or without purplish center; and mericarps 5, 2–2.5 mm long, muticous, dorsal surface externally covered with punctiform glandular trichomes.

Distribution and habitat: — Sida urens is another species of the genus that has a wide distribution, and occurs in tropical Africa, the Caribbean, and tropical America, from southern Florida and Mexico to northern Argentina and Brazil, where it is sparsely found in all regions ( Krapovickas 2006). The species is also found in Hawaii ( Starr et al. 2002, Wagner et al. 2012). It is found throughout the State of Pernambuco from Littoral to the brejos de altitude of the agreste portion of the Caatinga zone. This species is restricted to few and widely spaced individuals and grows in disturbed and urbanized areas such as dried river beds, plantations, roadsides and in ruderal places or wastelands.

Representative specimen: — BRAZIL. Pernambuco. Camaragibe, 22 November 2012, fl., fr., J.L. Brandão & J.A. Granja 212 (PEUFR).

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).