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healing croton, silver croton, silverleaf croton

goatweed, Lindheimer's hogwort, woolly croton

Habit Herbs or subshrubs, annual or short-lived perennial, 1–6 dm, monoecious. Herbs, annual, 5–20 dm, monoecious, stems, leaves, and buds with yellow-brown (ochraceous) pubescence when young, becoming glabrate.
Stems

several from base, branching distally into 2–4 branches, lepidote.

branching distally, stellate-hairy.

Leaves

not clustered;

stipules subulate, 0.2 mm;

petiole 0.2–1(–2) cm, glands absent at apex;

blade on proximal parts of stems oval to narrowly obovate, on distal parts oblong to lanceolate-oblong or broadly elliptic, 1–5 × 0.5–2(–3) cm, base rounded to narrowed, margins entire, apex obtuse to rounded, abaxial surface silvery, densely lepidote, adaxial surface darker green, sparsely lepidote or glabrate.

not clustered;

stipules linear, 0–5 mm;

petiole 1.5–7 cm, glands absent at apex;

blade ovate-lanceolate, 3–7 × 1–3 cm, base cordate to rounded or subcordate, margins entire, apex acute, abaxial surface pale green, not appearing brown-dotted, no stellate hairs with brown centers, densely stellate-hairy, adaxial surface greener, more sparsely hairy.

Inflorescences

bisexual, racemes, 2–5 cm, staminate flowers 15–35, pistillate flowers 2–8.

bisexual, racemes, 1.5–3 cm, staminate flowers 8–15, pistillate flowers 2–7.

Pedicels

staminate 1–5 mm, pistillate 0–2 mm.

staminate 0.5–3 mm, pistillate 0–1 mm.

Staminate flowers

sepals 5, 5 mm, abaxial surface lepidote;

petals 5, oblong-spatulate, 5 mm, abaxial surface densely lepidote, scales translucent, petals appearing hyaline;

stamens 10–15.

sepals (4–)5, 1.5–2 mm, abaxial surface stellate-hairy;

petals 5, linear-oblong, 1–1.5 mm, abaxial surface stellate-hairy;

stamens 9–13.

Pistillate flowers

sepals 5–7, connate for 1/2+ length, equal, 3–4 mm, margins entire, apex incurved, abaxial surface lepidote;

petals 0;

ovary 3-locular;

styles 3, 2–4 mm, 1–3 times 2-fid at apex, terminal segments 6–24.

sepals 7–8, equal, 5–7 mm, margins entire, apex straight to slightly incurved, abaxial surface yellowish woolly-tomentose;

petals 0;

ovary 3-locular;

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

Capsules

5–6 × 3–4 mm, smooth;

columella 3-angled.

6–8 × 8–9 mm, smooth;

columella tipped with 3-pronged grappling hooklike appendage.

Seeds

4–5 × 2.5–3 mm, dull.

4–5 × 4–4.5 mm, shiny.

2n

= 20.

Croton argyranthemus

Croton lindheimeri

Phenology Flowering Mar–Sep. Flowering May–Dec.
Habitat Deep sandy soils in pinelands, pine-oak scrub, sandhills. Old pastures, forest openings, bottomlands, fence rows, disturbed areas.
Elevation 0–200 m. (0–700 ft.) 0–300 m. (0–1000 ft.)
Distribution
from FNA
AL; FL; GA; LA; MS; TX; Mexico (Nuevo León, Tamaulipas)
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; AR; FL; GA; LA; MO; MS; SC; TN; TX
[WildflowerSearch map]
[BONAP county map]
Discussion

Croton argyranthemus is closely related to C. coryi. Although they have very different kinds of vegetative indumentum, the staminate petals are characteristically silvery-lepidote in both species.

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

Croton lindheimeri is very similar to C. capitatus, and the two can sometimes be found growing together in northeastern Texas. Croton lindheimeri can be distinguished by its more ochraceous pubescence on young growth, consistently acute leaf tips, somewhat more elongated pistillate part of the raceme, and pistillate sepal tips that do not recurve after anthesis. Croton lindheimeri was reported from Indiana, adventive on ballast in 1898, and from Kansas based on a single 1883 collection from Miami County, but apparently did not become established in either state.

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

Source FNA vol. 12, p. 211. FNA vol. 12, p. 218.
Parent taxa Euphorbiaceae > Croton Euphorbiaceae > Croton
Sibling taxa
C. alabamensis, C. argenteus, 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
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. 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 Pilinophytum lindheimeri, C. capitatus var. lindheimeri
Name authority Michaux: Fl. Bor.-Amer. 2: 215. (1803) — (as argyranthemum) (Engelmann & A. Gray) Alph. Wood: Class-book Bot. ed. s.n.(b), 631. (1861)
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