Botrychium pumicola

Coville in L. Underwood

in L. Underwood,Native Ferns ed. 6 69. 1900.

Common names: Pumice moonwort
EndemicConservation concern
Treatment appears in FNA Volume 2.

Trophophore stalk 0–10 mm, 0.1–0.5 times length of trophophore rachis; blade dull, glaucous, whitish green, deltate, 2-pinnate, 4 × 6 cm, thickly leathery. Pinnae to 6 pairs, overlapping, strongly ascending, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, asymmetrically cuneate, basal pinna pair often divided into 2 unequal parts, lobed to tip, margins entire, sinuate to shallowly crenate, apex rounded to truncate, venation pinnate. Sporophores 1–3-pinnate, 1–1.5 times length of trophophore. 2n =90.


Phenology: Leaves appearing in summer.
Habitat: Pumice scree
Elevation: 1900–2500m

Discussion

Botrychium pumicola is a famous narrow endemic known from only a few colonies on fully exposed pumice scree on the sides of and in the general vicinity of Crater Lake, Klamath and Deschutes counties, Oregon. This plant has a very congested appearance with an extremely compact sporangial cluster and overlapping pinnae. Like most other members of subg. Botrychium, the trophophore is located high on the common stalk, but the common stalk is subterranean, giving the impression that the leaf originates near ground level. Botrychium pumicola has been found growing with B. lanceolatum and B. simplex.

Of conservation concern.

Selected References

None.

Lower Taxa

None.
... more about "Botrychium pumicola"
rounded to truncate +
Warren H. Wagner Jr. +  and Florence S. Wagner +
Coville in L. Underwood +
simple +  and 5-pinnate +
whitish green +
4 cm40 mm <br />0.04 m <br /> (?) +
deltate +
6 cm60 mm <br />0.06 m <br /> (?) +
Pumice moonwort +
1900–2500m +
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 />) +
Pumice scree +
of widely scattered , long , uniseriate hairs +
sinuate;shallowly crenate +
unequal +
Leaves appearing in summer. +
spreading;ascending +
epiphytic +  and terrestrial +
spore-bearing +  and laminate +
photosynthetic +
with long , uniseriate hairs +  and glabrous +
in L. Underwood,Native Ferns ed. 6 +
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 +
Endemic +  and Conservation concern +
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 +
1-1.5 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 pumicola +
Botrychium subg. Botrychium +
species +
sessile +  and short-stalked +
0.1-0.5 times length of trophophore rachis +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
anastomosing +
pinnate +  and fan +