Chamaenerion angustifolium subsp. circumvagum

(Mosquin) Moldenke

Phytologia 27: 289. 1973.

Basionym: Epilobium angustifolium subsp. circumvagum Mosquin Brittonia 18: 169. 1966
Synonyms: C. angustifolium var. abbreviatum Lunell C. angustifolium var. canescens (Alph. Wood) Britton C. angustifolium subsp. macrophyllum (Haussknecht) Czerepanov C. danielsii (D. Löve) Czerepanov C. exaltatum Rydberg Chamerion angustifolium var. canescens (Alph. Wood) N. H. Holmgren & P. K. Holmgren C. angustifolium subsp. circumvagum (Mosquin) Hoch C. danielsii (D. Löve) Czerepanov C. platyphyllum (Daniels) Á. Löve & D. Löve E. angustifolium var. abbreviatum (Lunell) Munz E. angustifolium var. canescens Alph. Wood E. angustifolium subsp. macrophyllum (Haussknecht) Hultén E. angustifolium var. macrophyllum (Haussknecht) Fernald E. angustifolium var. platyphyllum (Daniels) Fernald E. danielsii D. Löve Pyrogennema angustifolium var. abbreviatum (Lunell) Lunell
Treatment appears in FNA Volume 10.

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.


Phenology: Flowering Jun–Sep.
Habitat: Moist, often disturbed places in montane and boreal forest regions, frequent after fires.
Elevation: 0–3800 m.

Distribution

St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Ariz., Ark., Calif., Colo., Conn., Del., Idaho, Ill., Ind., Iowa, Maine, Md., Mass., Mich., Minn., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Mexico (Coahuila, Nuevo León), Eurasia.

Discussion

Selected References

None.

Lower Taxa

None.
Peter C. Hoch +
(Mosquin) Moldenke +
Epilobium angustifolium subsp. circumvagum +
St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Mexico (Coahuila +, Nuevo León) +  and Eurasia. +
0–3800 m. +
Moist, often disturbed places in montane and boreal forest regions, frequent after fires. +
Flowering Jun–Sep. +
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. platyphyllum +, E. angustifolium var. abbreviatum +, E. angustifolium var. canescens +, E. angustifolium subsp. macrophyllum +, E. angustifolium var. macrophyllum +, E. angustifolium var. platyphyllum +, E. danielsii +  and Pyrogennema angustifolium var. abbreviatum +
Chamaenerion angustifolium subsp. circumvagum +
Chamaenerion angustifolium +
subspecies +