Aruncus dioicus var. dioicus

IllustratedEndemic
Synonyms: Aruncus allegheniensis Rydberg
Treatment appears in FNA Volume 9. Treatment on page 423. Mentioned on page 424.

Leaf surfaces glabrous or slightly hairy. Styles 0.3–0.8 mm. Follicles somewhat plump, 1.5–2 mm. Seeds 1.5–2 mm. 2n = 18.


Phenology: Flowering early summer.
Habitat: Rich woods, stream banks, north-facing roadsides, seeps, ditches
Elevation: 10–1500 m

Distribution

V9 714-distribution-map.jpg

Ala., Ga., Ky., Md., Miss., N.C., Ohio, Pa., S.C., Tenn., Va., W.Va.

Discussion

Variety dioicus is abundant in the southern Appalachians and into the Piedmont, where it typically occurs on mesic north-facing wooded slopes and road sides.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

T. Lawrence Mellichamp +
(Walter) Fernald +
compound +  and simple +
opposite +  and alternate +
subcordate +  and attenuate +
Actaea dioica +
reduced +
15 cm150 mm <br />0.15 m <br /> (60 cm600 mm <br />0.6 m <br />) +
thick +  and thin +
2-3-irregularly ternate +  and odd-pinnate +
Ala. +, Ga. +, Ky. +, Md. +, Miss. +, N.C. +, Ohio +, Pa. +, S.C. +, Tenn. +, Va. +  and W.Va. +
not +  and aggregated +
10–1500 m +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
retrorse +  and inverted +
ovate-elongate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
not +  and aggregated +
not +  and aggregated +
Rich woods, stream banks, north-facing roadsides, seeps, ditches +
rhizomatous +, glandular +, multicellular +  and simple +
straight +  and curved +
glabrous or +  and sparsely densely hairy +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
500-2500-flowered +
crassinucellate +
compound +  and simple +
deciduous +
hairy +  and glabrous +
long-petiolulate +
green +  and gray-green +
broadly ovate +  and narrowly lanceolate +
6 cm60 mm <br />0.06 m <br /> (15 cm150 mm <br />0.15 m <br />) +
entire +, pinnate +  and serrate +
toothed +, unlobed +  and lobed +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and apical +
2 +  and 4 +
0 (?) +  and 4 (?) +
free +  and distinct +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Flowering early summer. +
adnate +, free +, connate +  and distinct +
not arillate +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
caudate;elongate +
1.5mm +  and 2mm +
membranous +
persistent +
free +  and distinct +
spreading +  and appressed +
triangular +
1 cm10 mm <br />0.01 m <br /> (?) +
Illustrated +  and Endemic +
free +  and distinct +
rudimentary +
1.5mm +  and 2mm +
1 +  and 5 +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
persistent +
distinct +
basal +, lateral +, subterminal +  and terminal +
not elongate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Aruncus allegheniensis +
Aruncus dioicus var. dioicus +
Aruncus dioicus +
variety +
inconspicuous +
pistillate +  and staminate +
herb +  and clump-forming +