Flora of North America species comparison

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Botrychium pinnatum

northern moonwort, northwestern moonwort, St. John
Pinnae

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 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.
Sporophores

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

=180.

Botrychium pinnatum
Phenology Leaves appearing in June to August.
Habitat Grassy slopes, streambanks, woods
Elevation 0–2500 m (0–8200 ft)
Distribution
from FNA
AK; CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC; NT; YT
[WildflowerSearch map]
[BONAP county map]
Discussion

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.
Parent taxa 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. oneidense, B. pallidum, B. paradoxum, B. pedunculosum, B. pseudopinnatum, B. pumicola, B. rugulosum, B. simplex, B. spathulatum, B. virginianum
Synonyms B. boreale subsp. obtusilobum
Name authority 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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