Equisetum arvense (Common Horsetail)

 7/8/16 Lundy Canyon Trail, Inyo National Forest, 

Eastern Sierras, Mono County, CA

7/8/16 Lundy Canyon Trail

7/7/16  In the understory of pine trees along Green Creek at the primitive campsite,
Toiyabe National Forest, Eastern Sierra, Mono County, CA

7/7/16 Green Creek

LIFE LIST NOTES:

COMMON NAME: Common Horsetail

SPECIES: Equisetum arvense 

FAMILY: Equisetaceae (Horsetail Family)

LIFE LIST DATE: 7/8/2016

LOCATION: Lundy Canyon Trail, Inyo National Forest, Eastern Sierra, Mono County, CA

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Treatment from The Jepson Manual (1993):

Stems annual, of 2 kinds

Sterile stem 10–60 cm, green; basal internode of branch > subtending sheath; sheath 3–8.5 mm, ± as long as wide, teeth 6–14, 1.5 –3.5 mm, dark, often joined but not fused; branch with 3–4 rounded ridges, solid

Fertile stem 11–32 cm, unbranched, fleshy, brown, ephemeral; sheath 5–11 mm, > that of sterile stem, teeth 6–10, 3–7.5 mm

Ecology: Moist, disturbed areas

Elevation: < 3000 m.  

Bioregional distribution: California Floristic Province, Modoc Plateau, White and Inyo Mountains 

Distribution outside California: N.America, Europe, Asia

Horticultural information: IRR: 1, 4, 5, 6, 7, 15, 16, 17, 24 &SHD: 2, 3, 8, 9, 14, 18, 19, 20, 21, 22, 23; INV.