Flora of North America species comparison

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Thalictrum alpinum

alpine meadow-rue, arctic meadow-rue, dwarf meadow-rue, pigamon alpin
Stems

erect, scapose, or nearly scapose with very slender rhizomes, (3-)5-20(-30) cm, glabrous.
Leaves

blade 2x-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.

Thalictrum alpinum
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 (0-12500 ft)
Distribution
from FNA
AK; CA; CO; ID; MT; NM; NV; OR; UT; WY; BC; NF; NT; QC; YT; Greenland; n Eurasia
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 3.
Parent taxa Ranunculaceae > Thalictrum > sect. Thalictrum
Sibling taxa
T. amphibolum, T. arkansanum, T. clavatum, T. confine, T. cooleyi, T. coriaceum, T. dasycarpum, T. debile, T. dioicum, T. fendleri, T. heliophilum, T. macrostylum, T. minus, T. mirabile, T. occidentale, T. polycarpum, T. pubescens, T. sparsiflorum, T. texanum, T. thalictroides, T. venulosum
Synonyms T. alpinum var. hebetum
Name authority Linnaeus: Sp. Pl. 1: 545. (1753)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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