Geum species

Click on the images below to see larger versions.

Scientific Name Geum macrophyllum USDA PLANTS Symbol GEMA4
Common Name Bur Avens, Large-leaf Avens ITIS Taxonomic Serial No. 24654
Family Rosaceae (Rose) SEINet
Reference
Click Here
Description Life zones and habitat: Foothills to subalpine (5500 to 10000 ft ft.); moist areas in meadows, forests, streamsides.
Plant: Tall, erect perennial 12 to 48 inches tall; hairy stems, usually unbranched.
Leaves: Petiolate basal and stem leaves, margins irregularly cleft to toothed; basal leaves 3 to 12 inches long, pinnately-divided into 5 to 9 leaflets, the terminal one divided into 3 parts; stem leaves smaller, mostly divided into 3 leaflets, each 3/4 to 4-3/4 inches long, oblanceolate with leaf-like stipules, 1/4 to 3/4-inch long.
Inflorescence: Cyme of 2 to 15 flowers with 5 roundish, bright yellow petals; numerous (20 +/-) stamens; sepals erect-spreading initially, becoming reflexed.
Bloom Period: June to September.
Fruit: Bur-like seedhead with many styles bent at tips.
Reference: "Flora of Colorado" by Jennifer Ackerfield, "Guide to Colorado Wildflowers" by G.K. Guennel, "The Alpine Flora of the Rocky Mountains" by Richard W. Scott, and SEINet.
BONAP Distribution Map

Colorado Status:
Native
Scientific Name Geum rossii USDA PLANTS Symbol GERO2
Common Name Alpine Avens ITIS Taxonomic Serial No. 24660
Family Rosaceae (Rose) SEINet
Reference
Click Here
Description Life zones and habitat: Subalpine and alpine (10000 to 14300); hillsides, alpine meadows and tundra.
Plant: Erect perennial 6 to 8 inches tall in dense mats, slender reddish stems.
Leaves: Compound basal leaves up to 6 inches long divided into many small dark green oblanceolate to obovate leaflets, entire to coarsley toothed margins; smaller, pinnatifid stem leaves.
Inflorescence: Stems with 1 to 4 flowers with 5 roundish, bright yellow petals, 5 pointed green, often purplish sepals beneath; numerous yellow stamens and about 10 greenish-yellow pistils.
Bloom Period: June to September.
References: "Flora of Colorado" by Jennifer Ackerfield, "Guide to Colorado Wildflowers" by G.K. Guennel, "The Alpine Flora of the Rocky Mountains" by Richard W. Scott and Flora of North America.
BONAP Distribution Map

Colorado Status:
Native

© Tom Lebsack 2020