FNA: Equisetum scirpoides

	Equisetum scirpoides
	dwarf horsetail, dwarf scouring-rush, prêle faux-scirpe, sedgelike horsetail
Sheaths	green proximally, black distally, elliptic in face view, 1–2.5 × 0.75–1.5 mm; teeth 3, dark with white margins, not articulate to sheath.
Aerial stems	persisting more than a year, unbranched, tortuous, 2.5–28 cm; lines of stomates single; ridges 6.
Cone	apex pointed; spores green, spheric.
2n	=216.

	Equisetum scirpoides
Phenology	Cones maturing in summer, or cones overwintering and shedding spores in spring.
Habitat	Wet woods, peat bogs, tundra
Elevation	0–1000 m (0–3300 ft)
Distribution	AK; IA; ID; IL; MA; ME; MI; MN; MT; NH; NY; SD; VT; WA; WI; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK; YT; SPM; Greenland; n Eurasia [WildflowerSearch map] [BONAP county map]
Source	FNA vol. 2.
Parent taxa	Equisetaceae > Equisetum > subg. Equisetum
Sibling taxa	E. arvense, E. fluviatile, E. hyemale, E. laevigatum, E. palustre, E. pratense, E. ramosissimum, E. sylvaticum, E. telmateia, E. variegatum, E. ×ferrissii, E. ×litorale, E. ×mackaii, E. ×nelsonii
Name authority	Michaux: Fl. Bor.-Amer. 2: 281. (1803)
Web links	Local floras: BC, WA Local Web sites: Flora NW, Go Botany, IL Wildflowers, MI Flora, MN Wildflowers, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

dwarf horsetail, dwarf scouring-rush, prêle faux-scirpe, sedgelike horsetail

Sheaths

green proximally, black distally, elliptic in face view, 1–2.5 × 0.75–1.5 mm;

teeth 3, dark with white margins, not articulate to sheath.

Aerial stems

persisting more than a year, unbranched, tortuous, 2.5–28 cm;

lines of stomates single;

ridges 6.

Cone

apex pointed;

spores green, spheric.

=216.

Phenology

Cones maturing in summer, or cones overwintering and shedding spores in spring.

Habitat

Wet woods, peat bogs, tundra

Elevation

0–1000 m (0–3300 ft)

Distribution

AK; IA; ID; IL; MA; ME; MI; MN; MT; NH; NY; SD; VT; WA; WI; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK; YT; SPM; Greenland; n Eurasia

Source

Parent taxa

Sibling taxa

Name authority

Michaux: Fl. Bor.-Amer. 2: 281. (1803)

Web links

Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).

Choose a data source: Flora of North America, UW Burke Herbarium

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