Botrychium biternatum

(Savigny) L. Underwood

Bot. Gaz. 22: 407. 1896

Common names: Sparse-lobed grapefern southern grapefern
Basionyms: Osmunda biternata Savigny in Lamarck et al., Encycl. 4: 650. 1797
Synonyms: Botrychium dissectum var. tenuifolium (L.Underwood) Farwell Botrychium tenuifolium L.Underwood
Treatment appears in FNA Volume 2.
Trophophore stalk 4–20 cm, 2–2.5 times length of trophophore rachis; blade green to dark green, plane, 2–3-pinnate, to 18 × 28 cm, herbaceous. Pinnae to 7 pairs, usually remote, horizontal, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, undivided except in proximal 2/3–1/2. Pinnules elongate, obliquely lanceolate to narrowly lanceolate, margins nearly parallel and finely denticulate, apex short-acuminate, venation pinnate. Sporophores 1–2-pinnate, 2–3 times length of trophophore. 2n =90.

Phenology: Leaves green over winter, sporophores seasonal, new leaves appearing in late spring–early summer.
Habitat: Frequent in low woods and brushy fields
Elevation: 0–600 m


V2 762-distribution-map.gif

Ala., Ark., Del., Fla., Ga., Ill., Ind., Ky., La., Md., Miss., Mo., N.J., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va.


Botrychium biternatum often grows with B. dissectum and B. jenmanii. The name B. biternatum was misapplied by L.Underwood to B. lunarioides (W.H. Wagner Jr. 1961).

Selected References


Lower Taxa


Facts about "Botrychium biternatum"
AuthorWarren H. Wagner Jr. + and Florence S. Wagner +
Authority(Savigny) L. Underwood +
BasionymsOsmunda biternata +
Common nameSparse-lobed grapefern + and southern grapefern +
DistributionAla. +, Ark. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Ky. +, La. +, Md. +, Miss. +, Mo. +, N.J. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. + and W.Va. +
Elevation0–600 m +
HabitatFrequent in low woods and brushy fields +
IllustrationPresent +
Illustration copyrightFlora of North America Association +
IllustratorJohn Myers +
PhenologyLeaves green over winter, sporophores seasonal, new leaves appearing in late spring–early summer. +
Publication titleBot. Gaz. +
Publication year1896 +
ReferenceNone +
Source xml grained fna xml/V2/V2 762.xml +
SynonymsBotrychium dissectum var. tenuifolium + and Botrychium tenuifolium +
Taxon familyOphioglossaceae +
Taxon nameBotrychium biternatum +
Taxon parentBotrychium sect. Sceptridium +
Taxon rankspecies +
VolumeVolume 2 +