Thalictrum alpinum

Linnaeus

Sp. Pl. 1: 545. 1753.

Common names: Arctic meadow-rue dwarf meadow-rue pigamon alpin
Illustrated
Synonyms: Thalictrum alpinum var. hebetum B. Boivin
Treatment appears in FNA Volume 3.

Stems erect, scapose, or nearly scapose with very slender rhizomes, (3-) 5-20 (-30) cm, glabrous. Leaves all basal or single cauline leaf near base, 2-10 cm. Leaf-blade 2×-pinnately compound, proximal primary divisions ternate; leaflets cuneate-obovate to orbiculate, apically 3-5-lobed, 2-10 mm, surfaces glabrous. Inflorescences racemes, usually elongate, few flowered. Flowers: pedicels recurved in fruit; sepals early deciduous, purplish tinged, ovate or elliptic, 1-2.3 (-2.7) mm; stamens 8-15; filaments purple; anthers bright-yellow, 1.5-3 mm; stigmas purple. Achenes 2-6, nearly sessile; body lance-obovoid, 2-3.5 mm, with thick veins. 2n = 14, 21.


Phenology: Flowering late spring–summer (Jun–Aug).
Habitat: Wet meadows, damp rocky ledges and slopes, and cold (often calcareous) bogs in willow-sedge, lodgepole pine, and spruce-fir
Elevation: 0-3800 m

Distribution

V3 642-distribution-map.gif

Greenland, B.C., Nfld. and Labr. (Nfld.), N.W.T., Que., Yukon, Alaska, Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wyo., n Eurasia

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Thalictrum alpinum"
bright-yellow +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Marilyn M. Park +  and Dennis Festerling Jr. +
Linnaeus +
cuneate +, truncate +  and cordate +
straight +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
lance-obovoid +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
globose;cylindric +
Arctic meadow-rue +, dwarf meadow-rue +  and pigamon alpin +
Greenland +, B.C. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, Que. +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wyo. +  and n Eurasia +
0-3800 m +
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 +
Wet meadows, damp rocky ledges and slopes, and cold (often calcareous) bogs in willow-sedge, lodgepole pine, and spruce-fir +
compound +  and simple +
whorled +, opposite +  and alternate +
cauline +  and basal +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
3-5-lobed +, cuneate-obovate +  and orbiculate +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
palmate +  and pinnate +
crenate;entire +
(1-)2-200-flowered +
distinct +
conspicuous +
reduced +
Flowering late spring–summer (Jun–Aug). +
1 +  and 16 +
not arillate +  and stalked +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
purplish tinged +
deciduous +
distinct +
elliptic +  and ovate +
0.1 cm1 mm <br />0.001 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
ribbed +  and veined +
Illustrated +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
persistent +
Thalictrum alpinum var. hebetum +
Thalictrum alpinum +
Thalictrum sect. Thalictrum +
species +
herbaceous +  and woody +