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Smith, R.W.

Geum macrophyllum

Geum macrophyllum Willd.

Largeleaf Avens, Large-leaf Avens

Rosaceae (Rose Family)

Synonym(s):

USDA Symbol: GEMA4

USDA Native Status: L48 (N), AK (N), CAN (N), SPM (N)

A leafy plant with 1 or several stems, and a few yellow flowers on branches at the top.

Geums with yellow flowers are difficult to distinguish from Cinquefoils (Potentilla), but in Geum species the style is divided into an upper and lower part, and in most western species the leaves are also narrow at the base and broad at the tip.

From the Image Gallery

3 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Achene , Aggregate
Size Notes: Up to about 3-1/2 feet tall.
Leaf: Green
Fruit: Aggregated achenes.

Bloom Information

Bloom Color: Yellow
Bloom Time: Apr , May , Jun , Jul

Distribution

USA: AK , AZ , CA , CO , ID , ME , MI , MN , MT , ND , NH , NM , NV , NY , OR , SD , UT , VT , WA , WI , WY
Canada: AB , BC , MB , NB , NL , NS , NT , ON , PE , QC , SK , YT
Native Distribution: Alaska; south to Baja California; east to South Dakota and the Rocky Mountain region as far south as northern New Mexico.
Native Habitat: Moist woods or meadowland from low to high elevations.

Growing Conditions

Water Use: Medium
Light Requirement: Shade
CaCO3 Tolerance: Medium

Benefit

Conspicuous Flowers: yes

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:		FAC	FACW			FACW		FACW	FACW	FAC

This information is derived from: U.S. Army Corps of Engineers. (2023). 2022 National Wetland Plant List, version 3.6. U.S. Army Engineer Research and Development Center, Vicksburg, MS. https://wetland-plants.usace.army.mil/. Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

NPSOT - Williamson County Chapter - Georgetown, TX

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Geum macrophyllum in USDA Plants
FNA: Find Geum macrophyllum in the Flora of North America (if available)
Google: Search Google for Geum macrophyllum

Metadata

Record Modified: 2023-05-09
Research By: TWC Staff

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