veiny meadow-rue

(Thalictrum confine)

Conservation Status

 

No image available

 
  IUCN Red List

not listed

     
  NatureServe

NNR - Unranked

SNR - Unranked

     
  Minnesota

not listed

     
           
Wetland Indicator Status
     
  Great Plains

FAC - Facultative

     
  Midwest

FAC - Facultative

     
  Northcentral & Northeast

FACW - Facultative wetland

     
           
 
Description
 
 

Veiny meadow-rue is a 12 to 40 tall, erect, perennial forb that rises from the upturned end of a rhizome. Staminate flowers (male) and pistillate flowers (female) are borne on separate plants.

Stems are erect, hairless or nearly hairless.

Stem leaves are alternate. Stem leaves below the inflorescence are on leaf stalks. Those subtending the inflorescence branches are stalkless. They are 3 or 4 times ternately compound—divided into 3 main divisions (ternate), each division further divided into 3 segments (biternate), each segment further divided into 3 leaflets (triternate), or once more divided. The leaflets are to 1¾ wide and wider than long. They are round or inversely egg-shaped with the attachment at the narrow end. The leaflets have round-toothed lobes. The upper surface is hairless. The lower surface is hairless but has short, rounded, nipple-like glandular bumps or projections.

The inflorescence is a dense, narrow, cluster with ascending branches that appears at the end of the stems and branches.

Male flowers have 5 greenish-white, spreading, petal-like sepals. There are no petals. They droop at the end of short stalks. The sepals often drop off early leaving about 12 stamens with colored, not white, filaments and anthers. The flowers do not produce petals or nectar to attract insects. They are wind pollinated.

The fruit is an achene about long.

 
     
 

Height

 
 

12 to 40

 
     
 

Flower Color

 
 

Greenish-white

 
     
 

Similar Species

 
 

Early meadow-rue (Thalictrum doicum) flowers bloom earlier, April to May.

Tall meadow-rue (Thalictrum dasycarpum var. hypoglaucum) is a much taller plant, 3 to 5 at maturity. Middle and upper leaves are stalkless. The leaflets are as long as wide, or, more commonly, longer than wide. The leaflet lobes are untoothed or occasionally have a few additional teeth.

Waxy leaf meadow-rue (Thalictrum revolutum) stems are glaucous. Leaflet margins are rolled backward to the underside. The lower leaflet surface is covered with glandular hairs giving it a whitish, waxy appearance, and has a conspicuous network of raised veins.

 
     
 
Habitat
 
 

Wet to moderate moisture. Forests, shores, river banks, stream banks. Full to partial sun.

 
     
 
Biology
 
 

Flowering

 
 

June to July

 
     
 
Use
 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

2, 3, 4, 5, 7, 28.

 
  1/17/2012      
         
 

Nativity

 
 

Native

 
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
  Kingdom Plantae (green algae and land plants)  
  Subkingdom Viridiplantae (green plants)  
  Infrakingdom Streptophyta (land plants and green algae)  
  Superdivision Embryophyta (land plants)  
  Division Tracheophyta (vascular plants)  
  Subdivision Spermatophytina (seed plants)  
  Class Magnoliopsida (flowering plants)  
  Superorder Ranunculanae  
 

Order

Ranunculales (buttercups, poppies, and allies)  
 

Family

Ranunculaceae (buttercups)  
  Subfamily Thalictroideae (columbines and meadow-rues)  
 

Genus

Thalictrum (meadow-rue)  
       
 

Subordinate Taxa

 
       
       
 

Synonyms

 
 

Leucocoma lunellii

Leucocoma thyrsoidea

Leucocoma thyrsoidea unranked sylvana

Thalictrum campestre

Thalictrum confine var. columbianum

Thalictrum confine var. greeneanum

Thalictrum lunellii

Thalictrum occidentale var. columbianum

Thalictrum thyrsoideum

Thalictrum thyrsoideum var. silvanum

Thalictrum turneri

Thalictrum venulosum var. confine

Thalictrum venulosum var. fissum

Thalictrum venulosum var. lunellii

Thalictrum venulosum var. turneri

 
       
 

Common Names

 
 

boundary meadow-rue

early meadowrue

northern meadow-rue

veiny meadowrue

veiny meadow-rue

veiny-leaf meadow-rue

 
       

 

 

 

 

 

 

 

 

Glossary

Achene

A dry, one-chambered, single-seeded fruit, formed from a single carpel, with the seed attached to the membranous outer layer (wall) only by the seed stalk; the wall, formed entirely from the wall of the superior ovary, does not split open at maturity, but relies on decay or predation to release the contents.

 

Glandular hairs

Hairs spread over aerial vegetation that secrete essential oils. The oils act to protect against herbivores and pathogens or, when on a flower part, attract pollinators. The hairs have a sticky or oily feel.

 

Glaucous

Pale green or bluish gray due to a whitish, powdery or waxy film, as on a plum or a grape.

 

Rhizome

A horizontal, usually underground stem. It serves as a reproductive structure, producing roots below and shoots above at the nodes.

 

Ternate

Refers to leaves that are divided into three leaflets or sections.

       
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