Botrychium oneidense

(Gilbert) House

Amer. Midl. Naturalist 7: 126. 1905.

Common names: Blunt-lobed grapefern botryche d'oneida
Basionym: Botrychium ternatum var. oneidense Gilbert Fern Bull. 9: 27. 1901
Synonyms: Botrychium dissectum var. oneidense (Gilbert) Farwell Botrychium multifidum var. oneidense (Gilbert) Farwell
Treatment appears in FNA Volume 2.

Trophophore stalk 2–15 cm, 1.5–2.5 times length of blade rachis; blade dull bluish green, ± plane, 2–3-pinnate, to 15 × 20 cm, ± leathery. Pinnae to 5 pairs, usually remote, horizontal to ascending, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, undivided except in proximal 2/3–3/4. Pinnules obliquely ovate, margins finely crenulate to denticulate, apex rounded to acute, venation pinnate. Sporophores 2–3-pinnate, 1.5–2.5 times length of trophophore. 2n =90.

Phenology: Leaves green over winter, sporophores seasonal, new leaves appearing in spring.
Habitat: In moist, shady, acidic woods and swamps
Elevation: 0–1200 m


V2 493-distribution-map.gif

N.B., Ont., Que., Conn., Del., D.C., Ind., Ky., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Vt., Va., W.Va., Wis.


Botrychium oneidense commonly occurs with B. dissectum and B. multifidum. Young individuals of both may resemble B. oneidense (W.H. Wagner Jr. 1961b).

Selected References


Lower Taxa

... more about "Botrychium oneidense"
Warren H. Wagner Jr. +  and Florence S. Wagner +
(Gilbert) House +
Botrychium ternatum var. oneidense +
Blunt-lobed grapefern +  and botryche d'oneida +
N.B. +, Ont. +, Que. +, Conn. +, Del. +, D.C. +, Ind. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–1200 m +
In moist, shady, acidic woods and swamps +
Leaves green over winter, sporophores seasonal, new leaves appearing in spring. +
Amer. Midl. Naturalist +
Botrychium dissectum var. oneidense +  and Botrychium multifidum var. oneidense +
Botrychium oneidense +
Botrychium sect. Sceptridium +
species +