Thalictrum mirabile

Small

Bull. Torrey Bot. Club 27: 277. 1900.

Conservation concernEndemicIllustrated
Treatment appears in FNA Volume 3.

Stems weakly erect to reclining, 10-30 cm, glabrous. Leaves basal and cauline; basal petioles 2 cm, distal petioles shorter. Leaf-blade: basal usually ternately compound, distal gradually less divided; leaflets nearly orbiculate to orbiculate-reniform, apically 4-7-lobed, 20-30 mm wide, lobe margins crenate, surfaces abaxially glaucescent. Inflorescences panicles, few flowered. Flowers: sepals white, spatulate to rhombic-spatulate, 1.5 mm; filaments white, 2-3 mm; anthers 0.3-0.5 mm. Achenes 3-8, spreading; stipe 2.5-3.5 mm, nearly as long as achene body; body flat, 2.5-4 mm, abaxial margin convex, adaxial margin straight, conspicuously 3-veined on each face; beak minute.


Phenology: Flowering late spring–early summer (Jun).
Habitat: Moist sandstone bluffs, sinks, and rocky crevices
Elevation: 200-1500 m

Distribution

V3 732-distribution-map.gif

Ala., Ga., Ky., N.C., Tenn.

Discussion

Of conservation concern.

Thalictrum mirabile is very similar to T. clavatum. Field studies are in progress to clarify the status of this species.

Selected References

None.

Lower Taxa

None.

... more about "Thalictrum mirabile"
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. +
2 cm20 mm <br />0.02 m <br /> (?) +
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 />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
globose;cylindric +
Ala. +, Ga. +, Ky. +, N.C. +  and Tenn. +
200-1500 m +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 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 +
Moist sandstone bluffs, sinks, and rocky crevices +
compound +  and simple +
whorled +, opposite +  and alternate +
cauline +  and basal +
4-7-lobed +, nearly orbiculate +  and orbiculate-reniform +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
palmate +  and pinnate +
crenate;entire +
(1-)2-200-flowered +
distinct +
conspicuous +
reduced +
Flowering late spring–early summer (Jun). +
1 +  and 16 +
Bull. Torrey Bot. Club +
not arillate +  and stalked +
not persistent +
distinct +
spatulate +  and rhombic-spatulate +
1.5 cm15 mm <br />0.015 m <br /> (?) +
ribbed +  and veined +
Conservation concern +, Endemic +  and Illustrated +
weakly erect +  and reclining +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
persistent +
glaucescent +
Undefined sect. Sumnera +
Thalictrum mirabile +
Thalictrum sect. Physocarpum +
species +
herbaceous +  and woody +