Please try our next iteration of the Michigan Flora Online here. Beginning on February 1, 2023, will point to this new site.

The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.


1. Flowers few in an umbellate inflorescence (occasionally solitary); the perianth white to pink and much more conspicuous than the stamens.

T. thalictroides

1. Flowers numerous per inflorescence (6 to many in a panicle); stamens or carpels the most conspicuous part of the flower.

2. Upper cauline leaves long-petioled; leaflets glabrous and eglandular; blooming in April or May, before the leaves are fully expanded.

T. dioicum

2. Upper cauline leaves sessile or nearly so (the three main divisions on stalks appearing to be 3 petioles at a node); leaflets glabrous, pubescent, or with short-stalked glands; blooming June–July (–September), after the leaves are fully expanded.

3. Leaflets (especially on middle and lower leaves) with 2 or all 3 of the lobes again toothed or lobed, glabrous to sparsely glandular beneath.

T. venulosum

3. Leaflets mostly 3-lobed without additional teeth, usually pubescent or glandular beneath.

4. Fruit and undersides of leaflets with sessile or short-stalked glands.

T. revolutum

4. Fruit and leaflets not glandular, the leaflets usually ± pubescent beneath with multicellular hairs.

5. Longest mature anthers (1.5–) 1.6–2.5 (–3.4) mm long; longer stigmas mostly 2.2–3.6 mm long.

T. dasycarpum

5. Longest mature anthers 0.9–1.4 (–1.5) mm long; longer stigmas mostly 1–2.1 mm long.

T. pubescens

All species found in Thalictrum

Thalictrum dasycarpumPURPLE MEADOW-RUE 
Thalictrum dioicumEARLY MEADOW-RUE 
Thalictrum revolutumWAXY MEADOW-RUE 
Thalictrum thalictroidesRUE-ANEMONE 
Thalictrum venulosumVEINY MEADOW-RUE 


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 29, 2023.