Flora of North America species comparison

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Croton incanus

salvia, Torrey's croton, vara blanca
Habit Shrubs, 10–20 dm, monoecious.
Stems

much branched distally, stellate-velutinous.
Leaves

sometimes clustered near inflorescences;

stipules linear-subulate, 2–3 mm;

petiole 0.7–1.5 cm, (1/4–)3/8–1/2 leaf blade length, glands absent at apex;

blade oblong, ovate-oblong, or elliptic-oblong, 1.5–4(–6) × 1.5–3 cm, base rounded to obtuse, margins entire, apex acute to obtuse, abaxial surface whitish, densely stellate-tomentose, adaxial surface darker green, stellate-tomentose.
Inflorescences

bisexual, racemes, 2–5 cm, staminate flowers 10–25, pistillate flowers 2–4.
Pedicels

staminate 1.7–3 mm, pistillate 1–2 mm.
Staminate flowers

sepals 5, 1.5–2 mm, abaxial surface densely tomentose;

petals 5, oblanceolate, 1.5–2 mm, abaxial surface villous;

stamens 10–16.
Pistillate flowers

sepals 5, equal, 1.2–3.5 mm, margins entire, apex straight to slightly incurved, abaxial surface tomentose;

petals 0;

ovary 3-locular;

styles 3, 1.8–3.5 mm, 2-fid to base, terminal segments 6.
Capsules

6–8 × 4–5 mm, smooth;

columella apex with 3 rounded, inflated lobes.
Seeds

4.5–7 × 3–4 mm, dull.
2n

= 20.

Croton incanus
Phenology Flowering Mar–Nov.
Habitat Calcareous loams, xeric rocky limestone slopes and canyons.
Elevation 0–700 m. (0–2300 ft.)
Distribution
from FNA
TX; n Mexico; c Mexico
[BONAP county map]
Discussion

Croton incanus is known in the flora area from the trans-Pecos region to south Texas.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 217.
Parent taxa 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. 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 C. suaveolens var. oblongifolius, C. torreyanus
Name authority Kunth: in A. von Humboldt et al., Nov. Gen. Sp. 2(fol.): 58; 2(qto.): 73. (1817)
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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