Thalictrum dasycarpum

Fischer & Avé Lallemant in Fischer

in Fischer, C. A. Meyer & Avé-Lallemant, Index Sem. Hort. Petrop. 8: 72. 1842.

Common names: Purple meadow-rue
EndemicIllustrated
Synonyms: Thalictrum dasycarpum var. hypoglaucum (Rydberg) B. Boivin
Treatment appears in FNA Volume 3.

Stems erect, stout, 40-150 (-200) cm. Leaves chiefly cauline; basal and proximal cauline petiolate, distal cauline leaves sessile or nearly so; petioles and rachises glabrous or occasionally pubescent and/or stipitate-glandular. Leaf-blade: basal and proximal cauline 3-5×-ternately compound; leaflets brownish green to dark green or bright green, ovate to cuneate-obovate, apically undivided or 2-3 (-5) -lobed, 15-60 × 8-45 mm, length 0.9-2.6 times width, usually leathery with veins prominent abaxially, margins often revolute, lobe margins entire, surfaces abaxially usually pubescent and/or papillose (i.e., with very minute sessile glands). Inflorescences panicles, apically ± acutely pyramidal, many flowered; peduncles and pedicels usually glabrous, rarely pubescent or stipitate-glandular. Flowers usually unisexual, staminate and pistillate on different plants; sepals 4 (-6), whitish, lanceolate, 3-5 mm; filaments white to purplish, filiform, scarcely dilated distally, 2-6.5 mm, flexible; anthers 1-3.6 (-4) mm, usually strongly apiculate. Achenes numerous, sessile or nearly sessile; stipe 0-1.1 mm; body ovoid to fusiform, 2-4.6 mm, prominently veined, usually pubescent and/or glandular; beak often dehiscent as fruit matures, ± straight, filiform, 1.5-4.7 (-6) mm, about as long as achene body.


Phenology: Flowering late spring–summer (May-late Jul).
Habitat: Deciduous, riparian woods, damp thickets, swamps, wet meadows, and prairies
Elevation: 80-2500 m

Distribution

V3 320-distribution-map.gif

Alta., B.C., Man., Ont., Que., Sask., Yukon, Ala., Ariz., Ark., Colo., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Mich., Minn., Miss., Mo., Mont., Nebr., N.Mex., N.Y., N.Dak., Ohio, Okla., Pa., S.Dak., Tenn., Tex., Utah., Wis., Wyo.

Discussion

Thalictrum dasycarpum is a variable species similar to, and possibly intergrading with, T. pubescens. Glabrous variants of T. dasycarpum have been treated as T. dasycarpum var. hypoglaucum. Glabrous and glandular (stipitate and papillate) forms are found throughout the range of the species and occur together in some populations.

Native Americans used Thalictrum dasycarpum medicinally to reduce fever, cure cramps, as a stimulant for horses, and as a love charm (D. E. Moerman 1986).

Selected References

None.

Lower Taxa

None.
... more about "Thalictrum dasycarpum"
0.36 cm3.6 mm <br />0.0036 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
Marilyn M. Park +  and Dennis Festerling Jr. +
Fischer & Avé Lallemant in Fischer +
cuneate +, truncate +  and cordate +
Leucocoma +  and Undefined sect. Leucocoma +
0.47 cm4.7 mm <br />0.0047 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
straight +
filiform +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
glandular +  and pubescent +
ovoid;fusiform +
0.2 cm2 mm <br />0.002 m <br /> (0.46 cm4.6 mm <br />0.0046 m <br />) +
globose;cylindric +
nearly +  and sessile +
Purple meadow-rue +
Alta. +, B.C. +, Man. +, Ont. +, Que. +, Sask. +, Yukon +, Ala. +, Ariz. +, Ark. +, Colo. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Pa. +, S.Dak. +, Tenn. +, Tex. +, Utah. +, Wis. +  and Wyo. +
80-2500 m +
white +  and purplish +
dilated +  and filiform +
0.2 cm2 mm <br />0.002 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
pistillate +  and staminate +
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 +
Deciduous, riparian woods, damp thickets, swamps, wet meadows, and prairies +
cauline +, proximal +  and basal +
compound +  and simple +
whorled +, opposite +  and alternate +
brownish green +  and dark green or bright green +
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 m <br />) +
ovate +  and cuneate-obovate apically undivided or 2-3(-5)-lobed +
0.8 cm8 mm <br />0.008 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
palmate +  and pinnate +
crenate;entire +
(1-)2-200-flowered +
stipitate-glandular +, pubescent +  and glabrous +
stipitate-glandular +, pubescent +  and glabrous +
distinct +
conspicuous +
reduced +
stipitate-glandular;pubescent;glabrous +
Flowering late spring–summer (May-late Jul). +
1 +  and 16 +
in Fischer, C. A. Meyer & Avé-Lallemant, Index Sem. Hort. Petrop. +
stipitate-glandular;pubescent;glabrous +
not arillate +  and stalked +
not persistent +
distinct +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
ribbed +  and veined +
Endemic +  and Illustrated +
40 cm400 mm <br />0.4 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
0 cm0 mm <br />0 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
persistent +
papillose +
Thalictrum dasycarpum var. hypoglaucum +
Thalictrum dasycarpum +
Thalictrum sect. Leucocoma +
species +
herbaceous +  and woody +