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Croton willdenowii G.L. Webster. Glade Rushfoil, Outcrop Rushfoil, Broadleaf Rushfoil, Willdenow's Croton. Phen: Jun-Oct. Hab: Granitic flatrocks, diabase barrens, calcareous barrens, thin soils around other rock outcrops, open woodlands, disturbed sandy soil. Dist: CT, se. PA (Rhoads & Block 2007), IL, and se. KS, south to ne. FL, Panhandle FL, and TX.

Origin/Endemic status: Native

Taxonomy Comments: Van Ee & Berry (2009) argued that this taxon is only varietally distinct from Croton michauxii (see synonymy).

Synonymy ⓘ: = Ar, Fl2, K1, K4, Tn, Va, WH3, Webster (1992); = Croton michauxii G.L.Webster var. elliptica (Willd.) B.W.van Ee & P.E.Berry – FNA12, K3, van Ee & Berry (2009); = Crotonopsis elliptica Willd. – C, F, G, GrPl, Il, NE, Pa, RAB, S, S13, Tat, Tx, W

Links to other floras: = Croton michauxii var. elliptica - FNA12

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Heliophily ⓘ: 9

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image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Joey Shaw source | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Erect to leaning, sometimes bushy annual found on granitic flatrocks, diabase barrens, calcareous barrens, thin soils around other rock outcrops and disturbed, sandy soil.

Stems: Stems branched, densely covered with silvery scales with reddish-brown centers.

Leaves: Leaves alternate, short-petiolate to sessile, linear to elliptic, to 1 1/2 in. long, folded during dry weather, upper surface green and covered with star-shaped hairs.

Inforescence:

Flowers: Flowers separate in small, fuzzy clusters at stem ends, with male and female flowers separate; male flowers at summit of short spikes, consisting of 5 tiny petals, 5 tiny sepals and 5 stamens; female flowers at base of spikes, consisting a tiny 3- to 5-lobed calyx (no petals) and 2 divided styles.

Fruits: Fruit a tiny, ellipsoid capsule sparsely covered with star-shaped hairs.

Comments: The similar Croton michauxii differs in having slightly longer flower clusters (1/3-1 1/2 in. vs. less than 1/3 in.) and fuzzier fruits.

Height: 6-14 in.

plant sale text:

bloom table text:

description: Erect to leaning, sometimes bushy annual found on granitic flatrocks, diabase barrens, calcareous barrens, thin soils around other rock outcrops and disturbed, sandy soil.

stems: Stems branched, densely covered with silvery scales with reddish-brown centers.

leaves: Leaves alternate, short-petiolate to sessile, linear to elliptic, to 1 1/2 in. long, folded during dry weather, upper surface green and covered with star-shaped hairs.

inflorescence:

flowers: Flowers separate in small, fuzzy clusters at stem ends, with male and female flowers separate; male flowers at summit of short spikes, consisting of 5 tiny petals, 5 tiny sepals and 5 stamens; female flowers at base of spikes, consisting a tiny 3- to 5-lobed calyx (no petals) and 2 divided styles.

fruits: Fruit a tiny, ellipsoid capsule sparsely covered with star-shaped hairs.

comments: The similar Croton michauxii differs in having slightly longer flower clusters (1/3-1 1/2 in. vs. less than 1/3 in.) and fuzzier fruits.

cultural notes:

germination code:

native range:

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