Chamaenerion angustifolium subsp. circumvagum |
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fireweed |
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Stems | 30–200 cm, sparsely strigillose, usually glabrous proximally. |
Leaves | petioles 2–7 mm; cauline blades oblong- to elliptic-lanceolate, (6–)9–23 × (0.7–)1.5–3.4 cm, base subcuneate to attenuate, margins ± denticulate, surface strigillose on adaxial side and on abaxial midrib, or, rarely, glabrous. |
Inflorescences | strigillose; bracts 7–25 mm. |
Flowers | sepals 9–19 × 1.5–3 mm, acuminate; petals obovate to suborbicular, 14–25 × 7–14 mm, entire or scarcely emarginate; filaments 8–17 mm; anthers 2.5–3 mm; pollen mixed 3- and 4-porate (rarely 5-porate), 70–95 µm diam.; ovaries 8–25 mm, style 9–18 mm. |
Capsules | 5–9.5 cm; pedicels 1–3 cm. |
Seeds | 1–1.3 × 0.3–0.4 mm. |
2n | = 72, 108. |
Chamaenerion angustifolium subsp. circumvagum |
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Phenology | Flowering Jun–Sep. |
Habitat | Moist, often disturbed places in montane and boreal forest regions, frequent after fires. |
Elevation | 0–3800 m. (0–12500 ft.) |
Distribution |
AK; AR; AZ; CA; CO; CT; DE; IA; ID; IL; IN; MA; MD; ME; MI; MN; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OR; PA; RI; SD; TN; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; NT; ON; PE; QC; SK; YT; SPM; Mexico (Coahuila, Nuevo León); Eurasia |
Source | FNA vol. 10. |
Parent taxa | |
Sibling taxa | |
Synonyms | Epilobium angustifolium subsp. circumvagum, C. angustifolium var. abbreviatum, C. angustifolium var. canescens, C. angustifolium subsp. macrophyllum, C. danielsii, C. exaltatum, Chamerion angustifolium var. canescens, C. angustifolium subsp. circumvagum, C. danielsii, C. platyphyllum, E. angustifolium var. abbreviatum, E. angustifolium var. canescens, E. angustifolium subsp. macrophyllum, E. angustifolium var. macrophyllum, E. angustifolium var. platyphyllum, E. danielsii, Pyrogennema angustifolium var. abbreviatum |
Name authority | (Mosquin) Moldenke: Phytologia 27: 289. (1973) |
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