| Section 6 » Family Euphorbiaceae |
Show/Hide Synonym
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| Croton willdenowii | = | Crotonopsis elliptica | Gleason and Cronquist (1991) | | | Croton willdenowii | = | Crotonopsis elliptica | Fernald (1950) | | | Croton willdenowii | = | Crotonopsis elliptica | Gleason (1952) | | | Croton willdenowii | = | Crotonopsis elliptica | | | | Croton willdenowii | = | Crotonopsis elliptica | | | | Croton willdenowii | = | Crotonopsis elliptica | Radford, Ahles, and Bell (1968) | | | Croton willdenowii | = | Crotonopsis elliptica | Small (1933, 1938) | | | Croton willdenowii | = | Crotonopsis elliptica | Wofford (1989) | | | Croton willdenowii | = | Croton michauxii var. elliptica | Flora of North America (1993b, 1997, 2000, 2002a, 2002b, 2003a, 2004b, 2005, 2006a, 2006b, 2006c, 2007a, 2009, 2010) | | | Croton willdenowii | = | Croton michauxii var. elliptica | | | | Croton willdenowii | = | Croton michauxii var. elliptica | Webster in Kubitzki (2014). | | | Source: Weakley's Flora |
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| Author | G.L. Webster | |
| Distribution | Piedmont, southern low Mountains, Sandhills, and a few other Coastal Plain sites.
CT and PA to IL and KS, south to northern FL and TX. | |
| Abundance | In the Piedmont, quite local and mostly restricted to flatrocks and other exposed rocks, though can be common at such limited sites. Rare and local in most of the parts of the state, except mostly absent over the Coastal Plain and northern and central Mountains. | |
| Habitat | Xeric, nutrient-poor sandy soil of granitic flatrocks, glades, openings in pine-oak woodlands, and (rarely) in sandy disturbed areas. It thus has an odd array of different habitats, in different soil pH (some acidic but some circumneutral), though all are in thin soil. |
| Phenology | Flowering and fruiting June-October. | |
| Identification | Elliptical Rushfoil is a diminutive, very slender plant that nonetheless has a certain charm, with its narrow, silvery leaves (whitish beneath) and stem and tiny red-brown spots (at the center of each stellate hair). It reaches only 1 foot tall, with a few widely scattered alternate stem leaves that are narrowly elliptical to oblong; there are a few wide-spreading branches, but most leaves on them are near the tips, opposite or often whorled. The several inflorescences are small and are mostly at the branch tips. C. michauxii (Crotonopsis linearis) is very similar and occurs north to Horry County, SC and rarely in Brunswick County, NC. It differs in its longer flower spikes (>1 cm long vs. <5mm) and less dense stellate hairs on upper leaf surface (see Weakley key). | |
| Taxonomic Comments | Synonyms include Croton michauxii var. elliptica and Crotonopsis elliptica.
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| Other Common Name(s) | Glade Rushfoil, Willdenow's Croton. No single name has been adopted, in part owing to being shifted between several genera. | |
| State Rank | S3 | |
| Global Rank | G5 | |
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