Botrychium pinnatum

H. St. John

Amer. Fern J. 19: 11. 1929.

Common names: Northwestern moonwort
Endemic
Synonyms: Botrychium boreale subsp. obtusilobum (Ruprecht) R.T. Clausen
Treatment appears in FNA Volume 2.

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. 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. Sporophores 2-pinnate, 1–2 times length of trophophore. 2n =180.


Phenology: Leaves appearing in June to August.
Habitat: Grassy slopes, streambanks, woods
Elevation: 0–2500 m

Distribution

V2 582-distribution-map.gif

Alta., B.C., N.W.T., Yukon, Alaska, Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

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

Selected References

None.

Lower Taxa

None.
... more about "Botrychium pinnatum"
acute +  and truncate to somewhat +
Warren H. Wagner Jr. +  and Florence S. Wagner +
H. St. John +
simple +  and 5-pinnate +
0 cm0 mm <br />0 m <br /> (8 cm80 mm <br />0.08 m <br />) +
shiny +  and bright +
oblong-deltate +
0 cm0 mm <br />0 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Northwestern moonwort +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
0–2500 m +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Grassy slopes, streambanks, woods +
of widely scattered , long , uniseriate hairs +
entire to very +
Leaves appearing in June to August. +
spreading;ascending +
epiphytic +  and terrestrial +
spore-bearing +  and laminate +
photosynthetic +
with long , uniseriate hairs +  and glabrous +
Amer. Fern J. +
flattened +
not fleshy +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
with corky ridges +  and smooth +
list +  and count +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
not proliferous +
sessile +  and short-stalked +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
thick-walled +  and trilete +
1-2 times length of trophophore +
flattened +
not fleshy +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
unbranched +  and simple +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
tuberculate +  and rugate +
Botrychium boreale subsp. obtusilobum +
Botrychium pinnatum +
Botrychium subg. Botrychium +
species +
sessile +  and short-stalked +
0-0.1 times length of trophophore rachis +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
anastomosing +
pinnate +  and fan +