Sida rhombifolia |
Sida neomexicana |
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arrowleaf sida, axocatzín, Cuba jute, Cuban jute, escobilla, huinar, rhombus-leaf sida, sida |
New Mexico fanpetals, New Mexico sida |
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Habit | Subshrubs, 1 m. Stems erect, stellate-puberulent, hairs to 0.1 mm. | Herbs or subshrubs, perennial, usually less than 0.5 m, freely branching from base. |
Stems | erect, stellate-puberulent. |
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Leaves | stipules free from petiole, 1-veined, subulate, 5–6 mm, subequal to petiole; petiole 5–7 mm, 1/10–1/4 length of blade, stellate-puberulent; blade ± rhombic, 2.5–9 cm, smaller distally, 2–3(–4) times longer than wide, base usually cuneate, sometimes somewhat truncate to subcordate, margins serrate distally, entire basally, apex acute to subobtuse, surfaces stellate-puberulent or glabrescent adaxially. |
stipules free from petiole, 1-veined, linear to falcate, 5–7 mm, 1/2–1 times length of petiole; petiole 2–10 mm, to 1/4 length of blade, obscurely puberulent; blade narrowly oblong-lanceolate, 2–4.5 cm, 6–15 times longer than wide, base truncate, margins dentate to base, apex acute, surfaces sparsely hairy abaxially, glabrous adaxially. |
Inflorescences | axillary solitary flowers. |
axillary, solitary flowers, usually congested apically. |
Pedicels | slender, (1–)3–4 cm, 4–6 times length of calyx, much shorter than to ± equaling subtending leaf, at least distalmost. |
usually to 1 cm, subequal to calyx, much shorter than subtending leaf. |
Flowers | calyx ribbed, 5–6 mm, puberulent, lobes ovate; petals yellow, 7–9 mm; staminal column hairy; style 10–14-branched. |
calyx ribbed, 6–7 mm, minutely hairy, lobes triangular; petals yellow-orange to reddish, sometimes drying lavender, 10–12 mm; style 10–12-branched. |
Schizocarps | subconic, 4–5 mm diam., glabrous; mericarps 10–14, 3–4 mm, laterally reticulate, apex muticous to spined, sometimes 1-spined through failure of dehiscence, glabrous. |
oblate, 6–7 mm diam., apically puberulent; mericarps 10–12, 3 mm, obscurely reticulate laterally, apex muticous. |
2n | = 14, 28. |
= ca. 14. |
Sida rhombifolia |
Sida neomexicana |
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Phenology | Flowering year-round in warmer localities. | Flowering late summer. |
Habitat | Disturbed sites, roadsides, pastures, urban areas | Open, arid habitats |
Elevation | 0–1500 m (0–4900 ft) | 400–2400 m (1300–7900 ft) |
Distribution |
AL; AR; FL; GA; KS; LA; MS; NC; OK; SC; TX; VA; s Asia (China) [Introduced in North America; introduced also in Mexico, West Indies, Central America, South America, tropical Africa, Pacific Islands (Philippines, Polynesia), Australia]
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AZ; NM; TX; Mexico (Chihuahua, Coahuila, Durango)
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Discussion | Sida rhombifolia is found occasionally on ballast in New Jersey and Pennsylvania. It is a common weed in warm-temperate, subtropical, and tropical areas; its genetic diversity seems to indicate that it was introduced from the Old World. The species has been cultivated for medicinal and cordage use. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sida neomexicana resembles S. ciliaris in several respects, especially in the congested terminal inflorescences resulting from shorter internodes. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 317. | FNA vol. 6, p. 316. |
Parent taxa | Malvaceae > subfam. Malvoideae > Sida | Malvaceae > subfam. Malvoideae > Sida |
Sibling taxa | ||
Synonyms | S. hondensis, S. rhomboidea | |
Name authority | Linnaeus: Sp. Pl. 2: 684. (1753) | A. Gray: Proc. Amer. Acad. Arts 22: 296. (1887) |
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