Botrychium ascendens

W. H. Wagner

Amer. Fern J. 76: 36, figs. 1, 2. 1986.

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

Trophophore stalk 3–10 mm, 1/6 length of trophophore rachis; blade yellow-green, oblong to oblong-lanceolate, 1-pinnate, to 6 × 1.5 cm, thin but firm. Pinnae to 5 pairs, strongly ascending, 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, obliquely narrowly cuneate, undivided to tip, margins sharply denticulate and often shallowly incised, apex rounded, venation like ribs of fan, midrib absent. Sporophores 2-pinnate at base of sporangial cluster, 1.3–2 times length of trophophore. 2n =180.


Phenology: Leaves appearing in late spring to midsummer.
Habitat: In grassy fields, widely scattered
Elevation: 0–2500 m

Distribution

V2 668-distribution-map.gif

B.C., Ont., Yukon, Alaska, Calif., Mont., Nev., Oreg., Wyo.

Discussion

Botrychium ascendens is a distinctive little moonwort that grows with B. crenulatum, B. lunaria, and B. minganense. This species and B. pedunculosum are the only grapeferns that often have extra sporangia on the proximal pinnae.

Selected References

None.

Lower Taxa

None.

No values specified.

... more about "Botrychium ascendens"
rounded +
Warren H. Wagner Jr. +  and Florence S. Wagner +
W. H. Wagner +
simple +  and 5-pinnate +
yellow-green +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
oblong +  and oblong-lanceolate +
Upswept moonwort +
B.C. +, Ont. +, Yukon +, Alaska +, Calif. +, Mont. +, Nev. +, Oreg. +  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 />) +
In grassy fields, widely scattered +
of widely scattered , long , uniseriate hairs +
incised;denticulate +
Leaves appearing in late spring to midsummer. +
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 +
1.3-2 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 ascendens +
Botrychium subg. Botrychium +
species +
sessile +  and short-stalked +
1/6 length of trophophore rachis +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
anastomosing +
pinnate +  and fan +