Flora of North America species comparison

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Croton michauxii var. elliptica

Croton michauxii var. michauxii
Photo is of parent taxon

elliptic-leaf rushfoil, Willdenow's croton
Photo is of parent taxon

Michaux's croton, narrow-leaf rushfoil
Leaf

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.

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.
Inflorescences

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

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

usually less than 1 mm diam.

usually greater than 1 mm diam.
Achenes

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

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

Croton michauxii var. elliptica

Croton michauxii var. michauxii
Phenology Flowering Jun–Oct. Flowering Jun–Oct.
Habitat Sandstone and granitic outcrops (glades), disturbed sandy soils, forest openings, eroded slopes. Deep sandy soils, forest openings, disturbed soils, coasts, riverine beaches.
Elevation 0–300 m. (0–1000 ft.) 0–100 m. (0–300 ft.)
Distribution
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
from FNA
AL; AR; FL; GA; IA; IL; LA; MO; MS; SC; TN; TX
[BONAP county map]
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. michauxii
C. michauxii var. elliptica
Synonyms Crotonopsis elliptica, C. willdenowii, Leptemon ellipticum Crotonopsis abnormis, C. spinosa
Name authority (Willdenow) B. W. van Ee & P. E. Berry: Harvard Pap. Bot. 14: 68. (2009) unknown
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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