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Sida spinosa Linnaeus. Common name: Prickly Sida, Prickly-mallow, False-mallow. Phenology: (May-) Jun-Nov. Habitat: Disturbed areas, wet fields. Distribution: Native of the Neotropics and Paleotropics.

Origin/Endemic status: Pantropics

Synonymy : = Ar, Bah, C, Can, F, Fl4, FNA6, G, GrPl, Il, K4, Mi, Mo3, NcTx, NE, NS, NY, Pa, POWO, RAB, S, Tat, Tn, Tx, Va, W, WH3, WI, WV, Fryxell (1985); > Sida angustifolia Lam. — S13; > Sida spinosa L. — S13; Sida spinosa L. — (basionym)

Links to other floras: = Sida spinosa - FNA6

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACU
  • Eastern Mountains and Piedmont: UPL
  • Great Plains: UPL
  • Midwest: FACU
  • Northcentral & Northeast: FACU

Heliophily : 8

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image of plant© Joey Shaw source | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Aidan Campos source | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Aidan Campos source | Original Image ⭷

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Horticultural Information

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native range
Erect annual of disturbed areas, especially wet fields. Native of the Neotropics and Paleotropics.
Stems branched, covered with white hairs.
Leaves alternate, on petioles with spine-like stipules at the base, oval-elliptic to lance-shaped, to 2 in. long, toothed, finely hairy beneath.
Flowers single to several on short stalks arising from leaf axils, light yellow to orange-yellow, 1/3 in. wide, consisting of 5 floppy, asymmetric petals and a fused column of 5 styles and numerous stamens.
Fruit a ring of about 5 joined pod-like, kidney-shaped segments, each with 2 beaks, the ring surrounded by persistent, triangular calyx lobes.
1-3 ft.
Erect annual of disturbed areas, especially wet fields. Native of the Neotropics and Paleotropics.
Stems branched, covered with white hairs.
Leaves alternate, on petioles with spine-like stipules at the base, oval-elliptic to lance-shaped, to 2 in. long, toothed, finely hairy beneath.
Flowers single to several on short stalks arising from leaf axils, light yellow to orange-yellow, 1/3 in. wide, consisting of 5 floppy, asymmetric petals and a fused column of 5 styles and numerous stamens.
Fruit a ring of about 5 joined pod-like, kidney-shaped segments, each with 2 beaks, the ring surrounded by persistent, triangular calyx lobes.


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