Croton glandulosus |
Croton alabamensis |
|||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
sand croton, sand or tooth-leaf or Tropic croton, tooth-leaf croton, Tropic croton, vente conmigo |
Alabama croton |
|||||||||||||||||||||||||||||
Habit | Herbs, annual, 1–12 dm, monoecious. | Shrubs, 5–35 dm, monoecious. | ||||||||||||||||||||||||||||
Stems | much branched distally, usually coarsely stellate-hairy, rarely glabrescent. |
usually well branched distally, lepidote. |
||||||||||||||||||||||||||||
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. |
clustered at branch tips; stipules absent; petiole 0.6–2 cm, glands absent at apex; blade elliptic, ovate, or oblong, 3–10 × 1.5–5 cm, base rounded to obtuse, margins entire, sometimes ± undulate, apex acute, rounded, or emarginate, abaxial surface silvery or coppery, densely lepidote, adaxial surface green, sparsely lepidote. |
||||||||||||||||||||||||||||
Inflorescences | bisexual, racemes, 1–3 cm, staminate flowers 10–20, pistillate flowers 1–4. |
bisexual or unisexual, racemes, 2–4.5 cm, staminate flowers 0–15, pistillate flowers 0–10. |
||||||||||||||||||||||||||||
Pedicels | staminate 0.8–2 mm, pistillate 0–5 mm. |
staminate 2.2–4 mm, pistillate 2.2–7.5 mm (7–11 mm in fruit). |
||||||||||||||||||||||||||||
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 5, 1.1–2.9 mm, abaxial surface lepidote; petals 5, oblong-ovate, 2–3.1 mm, abaxial surface glabrous except margins stellate-ciliate; stamens 10–22. |
||||||||||||||||||||||||||||
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, 2–4.5 mm, margins entire, apex incurved, abaxial surface lepidote; petals 5, pale green, ovate, 2–3.5 mm; ovary 3-locular; styles 3, 2–5 mm, usually unbranched, rarely 2-fid, terminal segments 3 (or 6). |
||||||||||||||||||||||||||||
Capsules | 3.5–6 × 4–5 mm, smooth; columella 3-angled. |
1.6–2.5 × 2–3 mm, smooth; columella 3-angled. |
||||||||||||||||||||||||||||
Seeds | 3–4 × 2–2.5 mm, shiny. |
6.7–8 × 5.2–6 mm, shiny. |
||||||||||||||||||||||||||||
2n | = 16. |
|||||||||||||||||||||||||||||
Croton glandulosus |
Croton alabamensis |
|||||||||||||||||||||||||||||
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
|
AL; TX
|
||||||||||||||||||||||||||||
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). B. W. van Ee et al. (2006) examined populations of Croton alabamensis using DNA sequence and AFLP data, and their results supported the recognition of two varieties and an isolated position in the genus. Buds develop in the summer and fall for the following spring's flowers. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||||||||||||||||||||||
Key |
|
|
||||||||||||||||||||||||||||
Source | FNA vol. 12, p. 215. | FNA vol. 12, p. 210. | ||||||||||||||||||||||||||||
Parent taxa | Euphorbiaceae > Croton | Euphorbiaceae > Croton | ||||||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||||||||||
Synonyms | Decarinium glandulosum, Geiseleria glandulosa, Oxydectes glandulosa | |||||||||||||||||||||||||||||
Name authority | Linnaeus: Syst. Nat. ed. 10, 2: 1275. (1759) — (as glandulosum) | E. A. Smith ex Chapman: Fl. South. U.S. ed. 2, 648. (1883) | ||||||||||||||||||||||||||||
Web links |