Flora of North America species comparison

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Botrychium crenulatum

Botrychium pinnatum

crenulate moonwort, dainty moonwort, scalloped moonwort

northern moonwort, northwestern moonwort, St. John
Pinnae

to 5 pairs, spreading, well separated, 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, broadly fan-shaped, undivided to tip, margins mainly crenulate to dentate, proximal pinnae with 1 or more shallow incisions, apex rounded, apical lobe linear to linear-cuneate, well separated from adjacent lobes, venation like ribs of fan, midrib absent.

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 0.5–7 mm;

blade yellow-green, oblong, 1-pinnate, to 6 × 2 cm, thin, herbaceous.

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

1–2-pinnate, 1.3–3 times length of trophophore.

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

=90.

=180.

Botrychium crenulatum

Botrychium pinnatum
Phenology Leaves appearing in mid to late spring, dying in late summer; in extremely dry years of shorter duration or not appearing at all. Leaves appearing in June to August.
Habitat Local in marshy and springy areas Grassy slopes, streambanks, woods
Elevation 1200–2500 m (3900–8200 ft) 0–2500 m (0–8200 ft)
Distribution
from FNA
AZ; CA; ID; MT; NV; OR; UT; WA; WY
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC; NT; YT
[WildflowerSearch map]
[BONAP county map]
Discussion

Botrychium crenulatum is commonly associated with B. simplex in California. In the Wallowa Mountains of Oregon it occurs with B. ascendens, B. lunaria, and B. minganense.

(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. Botrychium Ophioglossaceae > Botrychium > subg. Botrychium
Sibling taxa
B. acuminatum, B. ascendens, B. biternatum, B. boreale, B. campestre, 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. 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. boreale subsp. obtusilobum
Name authority W. H. Wagner: Amer. Fern J. 71: 21. (1981) 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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