Contains 4 accepted taxa overall.
Characteristics
Classification
Citation
SIDA Linnaeus, Sp. Pl. 683. 1753.
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TYPE: Sida alnifolia Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 2: 520. 1913.
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Sida elliottii var. elliottii | ||||
| Sida rhombifolia var. rhombifolia | Arrowleaf Sida | |||
| Sida spinosa | Prickly Sida, Prickly-mallow, False-mallow | |||
| Sida ulmifolia | Broomweed, Wireweed |
Identification Key
1. Stems procumbent; leaf blades <2 cm long
2
1. Stems erect, ascending, or occasionally reclining; leaf blades 1-9 cm long, at least the larger ones
3
2. Leaves fairly evenly distributed along the stem; leaf blades crenate throughout the margin; petals white; mericarps slightly rugose
2. Leaves crowded at the stem tips; leaf blades dentate in the upper half; petals reddish, orangeish, to yellowish; mericarps prominently muricate
3. Style branches and mericarps 5
4
3. Style branches and mericarps 7-14
6
4. Stems usually viscid, glandular-puberulent; calyx usually glandular
4. Stems eglandular, not viscid; calyx eglandular
5
5. Stems and petioles minutely stellate-hairy, hairs to 0.5 mm; stems sometimes with a ca. 1 mm long spinose tubercle at the petiole base; pedicels apparent, >3 mm long
5. Stems and petioles with simple 1.5–3 mm long hairs mixed with shorter stellate hairs, rarely only stellate-hairy; stems lacking a spinose tubercules; pedicels inconspicuous, <4 mm long
6. Petioles of larger mature leaves 7-25 mm long; leaf blades cordate at the base
6. Petioles 0.5-10 mm long; leaf blades cuneate to truncate at the base
7
7. Leaf blades linear to oblong
7. Leaf blades lanceolate, ovate, to rhomboid
8
8. Stems pilose with simple hairs 1-2 mm long
8. Stems only stellate-pubescent, the hairs 0.5 mm long or less
9
9. Leaf blades glabrate or sparsely pubescent on the lower surface; pedicels unjointed, usually <1 cm long, occasionally to 2 cm long
9. Leaf blades sparsely pubescent or moderately to densely tomentose on the lower surface; pedicels jointed, usually >1 cm long, at least the longer ones
10
10. Leaf blades glabrate or sparsely pubescent on the lower surface
10. Leaf blades moderately to densely tomentose on the lower surface
11
11. Stem hairs to 0.1 mm; pedicels (1–)3–4 cm long; petals yellow, lacking a reddish spot
11. Stem hairs to 0.5 mm; pedicels to 2 cm long; petals cream or pale yellow with a reddish spot at the base
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| No synonyms found. | |||