Thalictrum clavatum

de Candolle

Syst. Nat. 1: 171. 1817.

Common names: Mountain meadow-rue
EndemicIllustrated
Synonyms: Thalictrum filipes Torrey & A. Gray Thalictrum nudicaule Schweinitz ex Torrey & A. Gray
Treatment appears in FNA Volume 3.

Roots few, blackish, filiform or somewhat tuberous. Stems erect, not scapose, 15-50 (-60) cm, glabrous. Leaves basal and cauline; proximal cauline leaves petiolate, 2-3×-ternately compound; distal cauline leaves sessile or short-petiolate, 2×-ternately compound or simple. Leaf-blade: leaflets reniform to obovate, apically 4-7-lobed, 10-30 mm wide, lobe margins crenate, surfaces abaxially glaucous. Inflorescences panicles or nearly corymbs, few flowered. Flowers: pedicels very slender, elongate; sepals white, obovate-spatulate, 2.5-4 mm; filaments white, 2.5-4 mm; anthers 0.3-0.5 mm. Achenes 3-8, spreading; stipe 1-3 (-4) mm, usually ± 1/2 as long (sometimes nearly as long) as achene body; body flat, falcate, 3-5 mm, abaxially convex, adaxially concave, conspicuously 3-veined on each face; beak minute.


Phenology: Flowering spring–summer (May–Jul).
Habitat: Rich moist woods, cliffs, seepage slopes, and mountain streams in mountains and piedmont
Elevation: 500 m

Distribution

V3 276-distribution-map.gif

Ga., Ky., N.C., S.C., Tenn., Va., W.Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Thalictrum clavatum"
long-stipitate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Marilyn M. Park +  and Dennis Festerling Jr. +
de Candolle +
cuneate +, truncate +  and cordate +
Undefined sect. Physocarpum +
straight +
minute +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
concave;convex;falcate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
globose;cylindric +
Mountain meadow-rue +
simple +, compound +, short-petiolate +  and sessile +
Ga. +, Ky. +, N.C. +, S.C. +, Tenn. +, Va. +  and W.Va. +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 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 +
Rich moist woods, cliffs, seepage slopes, and mountain streams in mountains and piedmont +
compound +  and simple +
whorled +, opposite +  and alternate +
cauline +  and basal +
4-7-lobed +, reniform +  and obovate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
palmate +  and pinnate +
crenate;entire +
(1-)2-200-flowered +
distinct +
conspicuous +
reduced +
Flowering spring–summer (May–Jul). +
1 +  and 16 +
compound +  and petiolate +
filiform +
not arillate +  and stalked +
not persistent +
distinct +
obovate-spatulate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ribbed +  and veined +
Endemic +  and Illustrated +
not scapose +
15 cm150 mm <br />0.15 m <br /> (50 cm500 mm <br />0.5 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
persistent +
Thalictrum filipes +  and Thalictrum nudicaule +
Thalictrum clavatum +
Thalictrum sect. Physocarpum +
species +
herbaceous +  and woody +