Flora of North America species comparison

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Croton michauxii var. michauxii

Croton michauxii var. elliptica
Photo is of parent taxon

Michaux's croton, narrow-leaf rushfoil
Photo is of parent taxon

elliptic-leaf rushfoil, Willdenow's croton
Leaf

blades lanceolate-linear, 1.8–3.5 × 0.1–0.3 cm, abaxial surface (midstem leaves) hairs with radii separate 1/2+ length, adaxial surface hairs appressed, not overlapping, radii usually 5–8.

blades lanceolate to ovate-lanceolate, 1.5–4 × 0.1–0.4(–1.5) cm;

abaxial surface (midstem leaves) hairs with radii separate less than 1/2 length, adaxial surface hairs often slightly raised, overlapping near midvein, radii usually 1–3.
Inflorescences

1–3 cm, achenes usually 3–6, ± laxly spaced (not appearing sessile in axil of subtending leaf).

usually less than 1 cm, achenes 1–2, crowded at base (appearing sessile in axil of subtending leaf).
Staminate flowers

usually greater than 1 mm diam.

usually less than 1 mm diam.
Achenes

densely stellate-lepidote, hairs ± spreading, radii separate most of length, umbos usually sharp, sometimes rounded.

sparsely stellate-lepidote, hairs appressed, radii joined most or all of length, umbos usually blunt, rarely sharp.

Croton michauxii var. michauxii

Croton michauxii var. elliptica
Phenology Flowering Jun–Oct. Flowering Jun–Oct.
Habitat Deep sandy soils, forest openings, disturbed soils, coasts, riverine beaches. Sandstone and granitic outcrops (glades), disturbed sandy soils, forest openings, eroded slopes.
Elevation 0–100 m. (0–300 ft.) 0–300 m. (0–1000 ft.)
Distribution
from FNA
AL; AR; FL; GA; IA; IL; LA; MO; MS; SC; TN; TX
[BONAP county map]
from FNA
AL; AR; CT; DE; FL; GA; IA; IL; IN; KS; KY; LA; MD; MO; MS; NC; NJ; OK; PA; SC; TN; TX; VA
Source FNA vol. 12, p. 220. FNA vol. 12, p. 220.
Parent taxa Euphorbiaceae > Croton > Croton michauxii Euphorbiaceae > Croton > Croton michauxii
Sibling taxa
C. michauxii var. elliptica
C. michauxii var. michauxii
Synonyms Crotonopsis abnormis, C. spinosa Crotonopsis elliptica, C. willdenowii, Leptemon ellipticum
Name authority unknown (Willdenow) B. W. van Ee & P. E. Berry: Harvard Pap. Bot. 14: 68. (2009)
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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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

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