Flora of North America species comparison

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Croton soliman

Croton argenteus

Soliman's croton

silver July croton
Habit Shrubs, 5–8 dm, monoecious. Herbs, annual, 2–12 dm, monoecious.
Stems

sparsely branched distally, sparsely stellate-hairy.

branching once into 2–3 branches, tomentose.
Leaves

not clustered;

stipules linear, (0–)1–2 mm, sometimes short stipitate-glandular;

petiole 1–2 cm, 2/5–1/2 leaf blade length, glands absent at apex;

blade ovate, 2–5 × 1.5–2.5 cm, base rounded-cuneate, margins entire, with scattered glandular-capitate processes 1 mm, usually denser at base, apex acute to acuminate, abaxial surface green, glabrous or sparsely stellate-hairy, usually along margin, adaxial surface slightly darker green, glabrous.

sometimes clustered near inflorescences;

stipules linear-subulate, 4–11 mm, unlobed or deeply divided;

petiole 0.3–8 cm, glands absent at apex;

blade ovate to ovate-oblong, 2–15 × 1.5–8 cm, base obtuse, cuneate, or subtruncate, margins denticulate, apex obtuse to rounded, abaxial surface pale green, not appearing brown-dotted, no stellate hairs with brown centers, densely stellate-hairy, adaxial surface green, less densely stellate-hairy.
Inflorescences

bisexual, racemes, 2–4 cm, staminate flowers 10–30, pistillate flowers 3–6.

bisexual, congested racemes, 1–4 cm, staminate flowers 4–10, pistillate flowers 3–6.
Pedicels

staminate 1–5 mm, pistillate 2–5 mm.

staminate 2–3 mm, pistillate 1–4 mm (3–5 mm in fruit).
Staminate flowers

sepals 5, 0.8–1 mm, abaxial surface sparsely stellate-hairy;

petals 5, spatulate, 1–1.3 mm, abaxial surface glabrous except margins ciliate basally;

stamens 15–20.

sepals 5, 1.5–2 mm, abaxial surface stellate-hairy;

petals 5, oblong, 2–3 mm, abaxial surface glabrous except margins ciliate;

stamens 10–13.
Pistillate flowers

sepals 5, unequal, 5–6 mm, margins entire, apex straight to slightly incurved, abaxial surface glabrous or with a few stellate hairs;

petals 0 or 5, white, linear, 2.5–3.5 mm;

ovary 3-locular;

styles 3, 3–4 mm, 4-fid, terminal segments 12.

sepals 5, unequal, 4–8 mm, margins deeply laciniate, apex incurved, abaxial surface stellate-hairy;

petals 0;

ovary 3-locular;

styles 3, 2–3 mm, 4-fid, terminal segments 12.
Capsules

6 × 5–6 mm, smooth;

columella apex with 3 rounded, inflated lobes.

5 × 7 mm, smooth;

columella 3-angled.
Seeds

4–5 × 3–4 mm, shiny.

3.2–3.8 × 2.4–3 mm, dull.

Croton soliman

Croton argenteus
Phenology Flowering May–Jul. Flowering Jun–Dec.
Habitat Thickets, low ridges. Disturbed sites, waste areas, levees.
Elevation 0–50 m. (0–200 ft.) 0–50 m. (0–200 ft.)
Distribution
from FNA
TX; e Mexico; s Mexico
[BONAP county map]
from FNA
TX; e Mexico; Central America; South America; West Indies [Introduced in North America]
[BONAP county map]
Discussion

Croton soliman is most similar to C. humilis. In the flora area, C. soliman is found only in Cameron County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Croton argenteus, which in the flora area is known only from Cameron and Hidalgo counties, may be a fairly recent introduction into the United States; the earliest known collections date from 1923.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 223. FNA vol. 12, p. 211.
Parent taxa Euphorbiaceae > Croton Euphorbiaceae > Croton
Sibling taxa
C. alabamensis, C. argenteus, C. argyranthemus, C. californicus, C. capitatus, C. ciliatoglandulifer, C. cortesianus, C. coryi, C. dioicus, C. elliottii, C. fruticulosus, C. glandulosus, C. heptalon, C. humilis, C. incanus, C. leucophyllus, C. lindheimeri, C. lindheimerianus, C. linearis, C. michauxii, C. monanthogynus, C. parksii, C. pottsii, C. punctatus, C. sancti-lazari, C. setigerus, C. sonorae, C. suaveolens, C. texensis, C. wigginsii
C. alabamensis, C. argyranthemus, C. californicus, C. capitatus, C. ciliatoglandulifer, C. cortesianus, C. coryi, C. dioicus, C. elliottii, C. fruticulosus, C. glandulosus, C. heptalon, C. humilis, C. incanus, C. leucophyllus, C. lindheimeri, C. lindheimerianus, C. linearis, C. michauxii, C. monanthogynus, C. parksii, C. pottsii, C. punctatus, C. sancti-lazari, C. setigerus, C. soliman, C. sonorae, C. suaveolens, C. texensis, C. wigginsii
Synonyms family euphorbiaceae Julocroton argenteus
Name authority Chamisso & Schlechtendal: Linnaea 6: 361. (1831) Linnaeus: Sp. Pl. 2: 1004. (1753) — (as argenteum)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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