Croton glandulosus |
Croton pottsii |
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sand croton, sand or tooth-leaf or Tropic croton, tooth-leaf croton, Tropic croton, vente conmigo |
leatherweed, leatherweed croton |
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Habit | Herbs, annual, 1–12 dm, monoecious. | Herbs, perennial, 1–6 dm, monoecious or dioecious. | ||||||||||||||||||||||||||||
Stems | much branched distally, usually coarsely stellate-hairy, rarely glabrescent. |
several from base, sparsely branched distally, stellate-hairy. |
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Leaves | not clustered; stipules linear-subulate, glandular or not, to 0.5 mm or absent; petiole 0.2–1 cm, glands at apex 2, yellow, sessile to shortly stipitate, cuplike; blade ovate proximally, oblong-lanceolate distally, 0.6–3.5(–7) × 0.3–1.5(–3) cm, base obtuse to truncate, margins coarsely crenate to serrate-dentate, apex obtuse to rounded, both surfaces green, stellate-hairy, glabrate, or rarely glabrous. |
sometimes clustered near inflorescences; stipules rudimentary; petiole 0.5–2 cm, glands absent at apex; blade ovate-oblong, proximal rounder, distal more ovate-elliptic, 1–6 × 1–3 cm, base rounded, margins entire, apex rounded to acute, both surfaces pale to ashy green, softly stellate-hairy. |
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Inflorescences | bisexual, racemes, 1–3 cm, staminate flowers 10–20, pistillate flowers 1–4. |
bisexual or unisexual, racemes, 0.5–2.5 cm, staminate and pistillate flowers each (12–)20–25. |
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Pedicels | staminate 0.8–2 mm, pistillate 0–5 mm. |
staminate 1.5–6 mm, pistillate 1–3.5 mm, ± recurved in fruit. |
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Staminate flowers | sepals 5, 0.8–1.2 mm, abaxial surface stellate-hairy; petals 5, oblanceolate, 1–1.3 mm, abaxial surface glabrous except margins ciliate; stamens 7–13. |
sepals (4–)5, 1–1.5 mm, abaxial surface densely stellate-hairy; petals (4–)5, oblong-lanceolate, 1–1.3 mm, abaxial surface glabrous except margins villous; stamens 10–15. |
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Pistillate flowers | sepals 5, subequal, 6–7.5 mm, margins entire, apex straight to slightly incurved, abaxial surface glabrous except stellate-hairy apically; petals 0 or 5, rudimentary; ovary 3-locular; styles 3, 1–2.5 mm, deeply 2-fid, terminal segments 6. |
sepals 5, equal, 1.5–3 mm, margins entire, apex straight to slightly incurved, abaxial surface glabrous except stellate-hairy at apex; petals 0; ovary 3-locular; styles 3, 0.5–4.5 mm, 2-fid to base, terminal segments 6. |
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Capsules | 3.5–6 × 4–5 mm, smooth; columella 3-angled. |
4–6(–7) × 4–5 mm, smooth; columella apex with 3 sharp projections. |
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Seeds | 3–4 × 2–2.5 mm, shiny. |
3.5–4 × 2–2.5 mm, shiny. |
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2n | = 16. |
= 20. |
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Croton glandulosus |
Croton pottsii |
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Distribution |
AL; AR; DE; FL; GA; IA; IL; IN; KS; KY; LA; MD; MI; MN; MO; MS; NC; NE; NJ; NM; OH; OK; PA; SC; TN; TX; VA; WI; WV; Mexico; Central America; South America; West Indies
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AZ; NM; TX; n Mexico; c Mexico
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Discussion | Varieties ca. 20 (5 in the flora). Croton glandulosus is widespread in the New World, with a complex pattern of variation. The classification here follows B. W. van Ee et al. (2009). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). The affinities of Croton pottsii lie with C. lindheimerianus and C. monanthogynus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 12, p. 215. | FNA vol. 12, p. 221. | ||||||||||||||||||||||||||||
Parent taxa | Euphorbiaceae > Croton | Euphorbiaceae > Croton | ||||||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||||||||||
Synonyms | Decarinium glandulosum, Geiseleria glandulosa, Oxydectes glandulosa | Lasiogyne pottsii | ||||||||||||||||||||||||||||
Name authority | Linnaeus: Syst. Nat. ed. 10, 2: 1275. (1759) — (as glandulosum) | (Klotzsch) Müller Arg.: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 15(2): 561. (1866) | ||||||||||||||||||||||||||||
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