Thalictrum dioicum

Linnaeus

Sp. Pl. 1: 545. 1753.

Common names: Early meadow-rue quicksilver-weed pigamon dio&iuml que
EndemicIllustrated
Treatment appears in FNA Volume 3.

Roots yellow to light-brown, fibrous, from stout caudex. Stems erect, 30-80 cm, glabrous or glandular. Leaves basal and cauline, petiolate. Leaf-blade 1-4×-ternately compound; leaflets reniform or cordate to obovate or orbiculate, apically 3-12-lobed, 10-45 mm wide, lobe margins often crenate, surfaces abaxially glabrous or glandular. Inflorescences terminal and axillary, panicles to corymbs, many flowered. Flowers: sepals greenish to purple, ovate or obovate to oval, 1.8-4 mm; filaments yellow to greenish yellow, 3.5-5.5 mm; anthers 2-4 mm, mucronate to acuminate; stigma purple. Achenes (3-) 7–13, not reflexed, sessile or nearly so; stipe terete, 0-0.2 mm; body ovoid to ellipsoid, not laterally compressed, 3.5-5 mm, glabrous, very strongly veined, veins not anastomosing-reticulate; beak 1.5-3 mm.


Phenology: Flowering spring (Apr–Jun).
Habitat: Rocky woods, ravines, and alluvial terraces, mountains and piedmont
Elevation: 10-1000 m

Distribution

V3 1090-distribution-map.gif

Man., Ont., Que., Ala., Conn., D.C., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mo., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., R.I., S.C., S.Dak., Tenn., Vt., Va., W.Va., Wis.

Discussion

Glandular plants of Thalictrum dioicum have often been misidentified as T. revolutum despite important differences, especially the leaflets having crenate versus entire lobe margins, respectively. The stamens in both T. dioicum and T. revolutum are pendulous.

Native Americans used roots of Thalictrum dioicum in various preparations to treat diarrhea and vomiting and for heart palpitations (D. E. Moerman 1986).

Selected References

None.

Lower Taxa

None.
... more about "Thalictrum dioicum"
nearly +  and sessile +
not reflexed +
mucronate +  and acuminate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Marilyn M. Park +  and Dennis Festerling Jr. +
Linnaeus +
cuneate +, truncate +  and cordate +
Heterogamia +
straight +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
compressed;ovoid;ellipsoid +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
globose;cylindric +
Early meadow-rue +, quicksilver-weed +, pigamon dio&iuml +  and que +
Man. +, Ont. +, Que. +, Ala. +, Conn. +, D.C. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
10-1000 m +
yellow +  and greenish yellow +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
sessile +  and pedicellate +
showy +  and inconspicuous +
unisexual +
0 cm0 mm <br />0 m <br /> (41 cm410 mm <br />0.41 m <br />) +
stipitate +, sessile +  and aggregate +
falcate;ovoid;obovoid +
Rocky woods, ravines, and alluvial terraces, mountains and piedmont +
whorled +, opposite +  and alternate +
cauline +  and basal +
3-12-lobed +, cordate +  and obovate or orbiculate +
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
palmate +  and pinnate +
crenate;entire +
distinct +
conspicuous +
reduced +
Flowering spring (Apr–Jun). +
1 +  and 16 +
yellow;light-brown +
not arillate +  and stalked +
greenish;purple +
not persistent +
distinct +
obovate +  and oval +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ribbed +  and veined +
Endemic +  and Illustrated +
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
persistent +
glandular;glabrous +
Thalictrum dioicum +
Thalictrum sect. Heterogamia +
species +
not anastomosing-reticulate +
herbaceous +  and woody +