Botrychium crenulatum

W. H. Wagner

Amer. Fern J. 71: 21. 1981.

Common names: Dainty moonwort
Endemic
Treatment appears in FNA Volume 2.

Trophophore stalk 0.5–7 mm; blade yellow-green, oblong, 1-pinnate, to 6 × 2 cm, thin, herbaceous. 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. Sporophores 1–2-pinnate, 1.3–3 times length of trophophore. 2n =90.


Phenology: Leaves appearing in mid to late spring, dying in late summer; in extremely dry years of shorter duration or not appearing at all.
Habitat: Local in marshy and springy areas
Elevation: 1200–2500 m

Distribution

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Ariz., Calif., Idaho, Mont., Oreg., Nev., Utah, Wash., Wyo.

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.

Selected References

None.

Lower Taxa

None.
... more about "Botrychium crenulatum"
Warren H. Wagner Jr. +  and Florence S. Wagner +
W. H. Wagner +
Dainty moonwort +
Ariz. +, Calif. +, Idaho +, Mont. +, Oreg. +, Nev. +, Utah +, Wash. +  and Wyo. +
1200–2500 m +
Local in marshy and springy areas +
Leaves appearing in mid to late spring, dying in late summer +  and in extremely dry years of shorter duration or not appearing at all. +
Amer. Fern J. +
Botrychium crenulatum +
Botrychium subg. Botrychium +
species +