Croton michauxii var. michauxii |
Croton michauxii |
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Michaux's croton, narrow-leaf rushfoil |
Michaux's croton, narrowleaf rushfoil, rushfoil |
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Habit | Herbs, annual, 1–9 dm, monoecious. | |||||
Stems | usually single from base, much branched from near middle, densely stellate-lepidote appearing silvery. |
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Leaves | 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. |
not clustered; stipules rudimentary; petiole 0.1–0.5 cm, glands absent at apex; blade lanceolate-linear to ovate-lanceolate, 1.5–4 × 0.1–0.4(–1.5) cm, base acute to cuneate, margins entire, apex acute, abaxial surface silvery, stellate-lepidote, adaxial surface green, sparsely stellate-hairy, hairs with few radii. |
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Inflorescences | 1–3 cm, achenes usually 3–6, ± laxly spaced (not appearing sessile in axil of subtending leaf). |
bisexual, spikes, 0.3–3 cm, staminate flowers 1–12, pistillate flowers 1–6. |
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Pedicels | pistillate absent, staminate 0–1 mm. |
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Staminate flowers | usually greater than 1 mm diam. |
sepals 5, 1 mm, abaxial surface lepidote; petals 5, spatulate, 0.6–1 mm, abaxial surface glabrous except margins villous; stamens 5–7. |
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Pistillate flowers | sepals (4–)5, equal, 1–1.5 mm, margins entire, apex straight, abaxial surface lepidote; petals 0; ovary 1-locular; styles 3, 0.5–0.8 mm, minutely 2-fid, terminal segments 3 or 6. |
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Achenes | densely stellate-lepidote, hairs ± spreading, radii separate most of length, umbos usually sharp, sometimes rounded. |
2.5–3 × 1–1.2 mm, smooth; columella absent. |
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Seeds | 2–2.5 × 1 mm, surface not visible because seed coat adherent to fruit wall. |
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Croton michauxii var. michauxii |
Croton michauxii |
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Phenology | Flowering Jun–Oct. | |||||
Habitat | Deep sandy soils, forest openings, disturbed soils, coasts, riverine beaches. | |||||
Elevation | 0–100 m. (0–300 ft.) | |||||
Distribution |
AL; AR; FL; GA; IA; IL; LA; MO; MS; SC; TN; TX |
AL; AR; CT; DE; FL; GA; IA; IL; IN; KS; KY; LA; MD; MO; MS; NC; NJ; OK; PA; SC; TN; TX; VA
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 12, p. 220. | FNA vol. 12, p. 220. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Crotonopsis abnormis, C. spinosa | Crotonopsis linearis | ||||
Name authority | unknown | G. L. Webster: Novon 2: 270. (1992) | ||||
Web links |