Jepson Flora Project: Jepson Interchange    

 
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

EQUISETACEAE

HORSETAIL FAMILY

Richard L. Hauke

Perennial from rhizome (above ground stem annual or perennial herb)
Stem generally erect, ridged lengthwise, hollow except at nodes, sometimes of 2 kinds (sterile, fertile); branches 0 or whorled and alternate leaves, sometimes solid
Leaves scale-like, whorled, fused into nodal sheath with as many teeth as leaves, generally not green
Sporangia several on inner surface of peltate scales that are clustered into a terminal cone; spores of 1 kind per sp., spheric, green, unmarked, with 4 strap-like appendages
Genera in family: 1 genus, 15 species: worldwide except Australia, New Zealand
Reference: [Hauke 1978 Nova Hedwigia 30:385–455]

EQUISETUM

HORSETAIL, SCOURING RUSH


Etymology: (Latin: horse, bristle, from roots of E. fluviatile L.)

Native

E. laevigatum A. Braun

SMOOTH SCOURING RUSH


Stem annual (or perennial herb in s), of 1 kind, 30–180 cm, green, unbranched; sheath 6–15 mm, longer than wide, generally with 1 dark band at tip, teeth 10–26, generally deciduous
Sporangia: cone tip rounded
Ecology: Moist, sandy or gravelly areas
Elevation: < 3000 m.
Bioregional distribution: California Floristic Province, Modoc Plateau, White and Inyo Mountains, Desert Mountains
Distribution outside California: to British Columbia, eastern US
Synonyms: E. funstoni A.A. Eaton; E. kansanum J. Schaffner
Horticultural information: IRR: 1, 2, 3, 4, 5, 6, 7, 14, 15, 16, 17, 22, 23, 24 &SHD: 8, 9, 18, 19, 20, 21; INV.

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