Botrychium crenulatum |
Botrychium boreale |
|
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crenulate moonwort, dainty moonwort, scalloped moonwort |
northern moonwort |
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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 6 pairs, ascending, mostly overlapping, distance between 1st and 2d pinnae only slightly greater than between 2d and 3d pairs, basal pinna pair usually considerably larger than adjacent pair, obliquely rhomboidal to oblanceolate-spatulate, mostly shallowly lobed to rarely pinnate, margins entire to very narrowly shallowly crenulate, apex pointed, venation pinnate only at bases of proximal pinnae, otherwise ± like ribs of fan. |
Trophophore | stalk 0.5–7 mm; blade yellow-green, oblong, 1-pinnate, to 6 × 2 cm, thin, herbaceous. |
stalk sessile or nearly so; blade shiny green, ovate-deltate, 1–2-pinnate, to 6 cm, fleshy. |
Sporophores | 1–2-pinnate, 1.3–3 times length of trophophore. |
1–2-pinnate, 1–1.5 times length of trophophore. |
2n | =90. |
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Botrychium crenulatum |
Botrychium boreale |
|
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 July and August. |
Habitat | Local in marshy and springy areas | Dry meadows, south-facing slopes |
Elevation | 1200–2500 m (3900–8200 ft) | 200–600 m (700–2000 ft) |
Distribution |
AZ; CA; ID; MT; NV; OR; UT; WA; WY
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Greenland |
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.) |
This well-marked northern Eurasian species is best known in Scandinavia, where it occurs most commonly with Botrychium lunaria, with which it occasionally hybridizes. (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 | ||
Name authority | W. H. Wagner: Amer. Fern J. 71: 21. (1981) | J. Milde: Bot. Zeitung 15(51): 880. (1857) |
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