Anemone piperi

Britton ex Rydberg

Bull. Torrey Bot. Club 29: 153. 1902.

Common names: Piper's anemone
Endemic
Treatment appears in FNA Volume 3.

Aerial shoots 10-35 cm, from rhizomes, rhizomes primarily vertical, occasionally strongly ascending. Basal leaves (0-) 1-2, ternate; petiole 10-20 cm; terminal leaflet sessile, rhombic, lanceolate, or oblanceolate, (1.5-) 2.5-6 × (1-) 2-4 cm, base narrowly cuneate, margins coarsely serrate to coarsely dentate on distal 1/2-2/3, apex acuminate to narrowly acute, surfaces pilose or glabrous; lateral leaflets unlobed or sometimes 1×-lobed; ultimate lobes 10-19 mm wide. Inflorescences 1-flowered; peduncle coarsely pilose distally; involucral-bracts 3, 1-tiered, ternate, ±similar to basal leaves, bases distinct; terminal leaflet sessile, rhombic, lanceolate, or oblanceolate, (1.5-) 2-5.5 (-7) × (0.6-) 1-2.5 cm, base narrowly cuneate, margins coarsely serrate to coarsely dentate on distal 1/2-2/3, apex acuminate to narrowly acute, surfaces pilose or glabrous; lateral leaflets unlobed or sometimes 1×-lobed; ultimate lobes (5-) 8-18 mm wide. Flowers: sepals 5-7, white, rarely pinkish, elliptic-obovate to ovate, (6-) 8-20 × 6-8 mm, glabrous; stamens 35-55 (-90). Heads of achenes nearly spheric; pedicel (1.5-) 2-5 cm. Achenes: body ellipsoid to obliquely ovoid, 3-4 × 1.5-2 mm, not winged, villous; beak straight or slightly curved, 0.5-1 mm, glabrous or proximally minutely puberulous, not plumose.


Phenology: Flowering spring–summer (Apr–Aug).
Habitat: Shaded, moist woods
Elevation: 400-3000 m

Distribution

V3 91-distribution-map.gif

B.C., Idaho, Mont., Oreg., Utah, Wash.

Discussion

Plants of Anemone piperi from southeastern Washington and northeastern Oregon (i.e., the westernmost limits of the species) are sometimes intermediate between A. piperi and A. oregana. Although they possess vertical rhizomes characteristic of A. piperi, they have the bluish or pinkish sepals of A. oregana. These plants are best referred to A. piperi, pending detailed biosystematic analysis.

Selected References

None.

Lower Taxa

None.

"broadened" is not a number.

... more about "Anemone piperi"
Bryan E. Dutton +, Carl S. Keener +  and Bruce A. Ford +
Britton ex Rydberg +
distinct +
cuneate +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
curved +  and straight +
rudimentary +
puberulous +  and glabrous +
not plumose +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ellipsoid;obliquely ovoid +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
globose;cylindric +
Piper's anemone +
2-9-flowered +
B.C. +, Idaho +, Mont. +, Oreg. +, Utah +  and Wash. +
400-3000 m +
sessile +  and pedicellate +
showy +  and inconspicuous +
0 cm0 mm <br />0 m <br /> (60 cm600 mm <br />0.6 m <br />) +
stalked +, sessile +  and aggregate +
ovoid;obovoid +
Shaded, moist woods +
spheric +
axillary +  and terminal +
petiolate +, compound +  and simple +
whorled +, opposite +  and alternate +
palmate +  and pinnate +
dentate +  and serrate +
toothed;entire +
serrate to coarsely +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
distinct +
conspicuous +
reduced +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Flowering spring–summer (Apr–Aug). +
Bull. Torrey Bot. Club +
ascending +  and vertical +
not arillate +  and stalked +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
pinkish;white +
not persistent +
distinct +
5 +  and 7 +
elliptic-obovate +  and ovate +
0.35 cm3.5 mm <br />0.0035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
persistent +
glabrous;pilose;glabrous;pilose +
Anemonastrum +, Anemonidium +, Anemonoides +, Hepatica +, Jurtsevia +  and Pulsatilla +
Anemone piperi +
species +
5.5 cm55 mm <br />0.055 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
oblanceolate;lanceolate;oblanceolate;lanceolate;rhombic;oblanceolate;lanceolate;oblanceolate;lanceolate;rhombic +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
2-9-flowered +
herbaceous +  and woody +