Flora of North America species comparison

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Botrychium oneidense

Botrychium pinnatum

blunt-lobe grape-fern, blunt-lobed grapefern, botryche d'oneida, botryche du lac onéida

northern moonwort, northwestern moonwort, St. John
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.

to 7 pairs, only slightly ascending, approximate to overlapping, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, basal pinna pair approximately equal in size and cutting to adjacent pair, obliquely ovate to lanceolate-oblong, to spatulate, deeply and regularly lobed or pinnulate, lobed to tip, margins entire to very shallowly crenate, apex truncate to somewhat acute, venation pinnate.
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.

stalk 0–2 mm, 0 to 0.1 times length of trophophore rachis;

blade bright shiny green, oblong-deltate, 1–2-pinnate, to 8 × 5 cm, papery.
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.

2-pinnate, 1–2 times length of trophophore.
2n

=90.

=180.

Botrychium oneidense

Botrychium pinnatum
Phenology Leaves green over winter, sporophores seasonal, new leaves appearing in spring. Leaves appearing in June to August.
Habitat In moist, shady, acidic woods and swamps Grassy slopes, streambanks, woods
Elevation 0–1200 m (0–3900 ft) 0–2500 m (0–8200 ft)
Distribution
from FNA
CT; DC; DE; IN; KY; MA; MD; ME; MI; MN; NC; NH; NJ; NY; OH; PA; RI; VA; VT; WI; WV; NB; ON; QC
[WildflowerSearch map]
from FNA
AK; CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC; NT; YT
[WildflowerSearch map]
[BONAP county map]
Discussion

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

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Botrychium pinnatum is most commonly associated with B. lanceolatum and B. lunaria. Specimens of B. pinnatum have been misidentified as Botrychium boreale.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 2. FNA vol. 2.
Parent taxa Ophioglossaceae > Botrychium > subg. Sceptridium > sect. Sceptridium Ophioglossaceae > Botrychium > subg. Botrychium
Sibling taxa
B. acuminatum, B. ascendens, B. biternatum, B. boreale, B. campestre, B. crenulatum, B. dissectum, B. echo, B. gallicomontanum, B. hesperium, B. jenmanii, B. lanceolatum, B. lunaria, B. lunarioides, B. matricariifolium, B. minganense, B. montanum, B. mormo, B. multifidum, B. pallidum, B. paradoxum, B. pedunculosum, B. pinnatum, B. pseudopinnatum, B. pumicola, B. rugulosum, B. simplex, B. spathulatum, B. virginianum
B. acuminatum, B. ascendens, B. biternatum, B. boreale, B. campestre, B. crenulatum, B. dissectum, B. echo, B. gallicomontanum, B. hesperium, B. jenmanii, B. lanceolatum, B. lunaria, B. lunarioides, B. matricariifolium, B. minganense, B. montanum, B. mormo, B. multifidum, B. oneidense, B. pallidum, B. paradoxum, B. pedunculosum, B. pseudopinnatum, B. pumicola, B. rugulosum, B. simplex, B. spathulatum, B. virginianum
Synonyms B. ternatum var. oneidense, B. dissectum var. oneidense, B. multifidum var. oneidense B. boreale subsp. obtusilobum
Name authority (Gilbert) House: Amer. Midl. Naturalist 7: 126. (1905) H. St. John: Amer. Fern J. 19: 11. (1929)
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).



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