Botrychium acuminatum

W. H. Wagner

Contr. Univ. Michigan Herb. 17: 321. 1990.

Common names: Pointed moonwort
Treatment appears in FNA Volume 2.

Trophophore stalk 0–20 mm, 0.1–0.5 times length of trophophore rachis; blade dull, glaucescent, ovate-oblong, 1-pinnate, to 6 × 5 cm, firm. Pinnae to 6 pairs, spreading to ascending, mostly separated by pinna width, 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 next adjacent pair, narrowly oblanceolate to linear-lanceolate, simple to irregularly divided to tip, margins commonly ± entire and with 1–several shallow and irregular lobes, apex acuminate, venation pinnate. Sporophores 1–2-pinnate, 1.4–2 times length of trophophore. 2n =180.


Phenology: Leaves appearing in midspring, dying in fall.
Habitat: Lake Superior region in sand dunes in shade, old fields, grassy railroad sidings, and roadside ditches
Elevation: 200–500 m

Discussion

Botrychium acuminatum grows with various other moonworts, particularly its nearest relatives, B. hesperium and B. matricariifolium.

Of conservation concern.

Selected References

None.

Lower Taxa

None.
... more about "Botrychium acuminatum"
acuminate +
Warren H. Wagner Jr. +  and Florence S. Wagner +
W. H. Wagner +
simple +  and 5-pinnate +
glaucescent +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
ovate-oblong +
0 cm0 mm <br />0 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Pointed moonwort +
Ont. +  and Mich. +
200–500 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 />) +
Lake Superior region in sand dunes in shade, old fields, grassy railroad sidings, and roadside ditches +
of widely scattered , long , uniseriate hairs +
shallow +
dentate;lacerate +
Leaves appearing in midspring, dying in fall. +
spreading;ascending +
epiphytic +  and terrestrial +
spore-bearing +  and laminate +
photosynthetic +
with long , uniseriate hairs +  and glabrous +
Contr. Univ. Michigan Herb. +
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 +
1.4-2 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 acuminatum +
Botrychium subg. Botrychium +
species +
sessile +  and short-stalked +
0.1-0.5 times length of trophophore rachis +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
anastomosing +
pinnate +  and fan +