Difference between revisions of "Equisetum ×nelsonii"
Amer. Fern J. 16: 46. 1926.
Basionym: Equisetum variegatum var. nelsonii A.A. Eaton Fern Bull. 12: 41. 1904
Treatment appears in FNA Volume 2. Treatment on page 84.
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|name=Equisetum variegatum var. nelsonii | |name=Equisetum variegatum var. nelsonii | ||
|authority=A.A. Eaton | |authority=A.A. Eaton | ||
| + | |publication_title=Fern Bull. | ||
| + | |publication_place=12: 41. 1904 | ||
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|publication year=1926 | |publication year=1926 | ||
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V2/V2_45.xml |
|genus=Equisetum | |genus=Equisetum | ||
|subgenus=Equisetum subg. Equisetum | |subgenus=Equisetum subg. Equisetum | ||
Revision as of 18:56, 24 September 2019
Aerial stems persisting less than a year or only the proximal part overwintering, unbranched, 20–60 cm; lines of stomates single; ridges 6–14. Sheaths green, elongate, 3.5–7.5 × 2–4 mm; teeth 6–14, centers brown and margins white, prominent, tip usually brown, long, filiform. Cone apex pointed; spores white, misshapen.
Phenology: Cones maturing in early summer, but spores not shed.
Habitat: Lakeshores, riverbanks.
Distribution
Ont., Que., Ill., Ind., Mich., Minn., Mont., N.Y., Oreg., Wis., Wyo.
Discussion
Equisetum × nelsonii, the hybrid between E. laevigatum and E. variegatum, is often mistaken for small forms of E. × ferrissii.
Selected References
None.
Lower Taxa
None.