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Montana Field Guide

Montana Field Guides

Largeleaf Avens - Geum macrophyllum


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 5

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General Description
Stems erect or ascending, 20–100 cm, hirsute, glandular above. Leaf blades oblong, sparsely hirsute, 8–25 cm long, divided into 4 to 8 ovate, dentate main lateral leaflets; the terminal leaflet cordate-orbicular, 3- to 5-lobed, much larger than the lateral ones. Inflorescence a glandular, open, leafy-bracteate cyme. Flowers erect: hypanthium saucer-shaped; sepals green, 2–5 mm long, reflexed, tomentose on the margins; petals yellow, 4–7 mm long. Achenes 2–3 mm long, villous; persistent style 3–5 mm long, glandular; the deciduous, spreading upper portion hirsute (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety perincisum (Rydb.) Raup.

Species Range
Present
 


Range Comments
AK to NL south to CA, NM, MN, NY; Asia (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 111

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Wet meadows, thickets, woodlands, moist forest openings, often along streams, wetlands; valleys to lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Largeleaf Avens — Geum macrophyllum.  Montana Field Guide.  .  Retrieved on , from