Rubberweed (2)
Rubberweeds, also commonly called Bitterweeds, usually have 8 petals with three-toothed tips which droop when the plant ages. The yellow disk flowers form a dome. Leaves are divided into narrow segments. See also Old-Man-of-the-Mountain.
Pingue Rubberweed
Hymenoxys richardsonii var. richardsonii
Family:
Sunflower (Asteraceae)
AKA:
Richardson's Bitterweed
Photo taken on:
August 23, 2004
Location:
Almont Triangle, GV, CO
Life Zones:
Foothills to montane
Habitat:
Dry rocky meadows and slopes
Grows to 18" with up to 10 woody stems and 30 flower heads per plant. Flowers are ¾" across.
Flora of North America reference.
Colorado Rubberweed
Hymenoxys richardsonii var. floribunda
Family:
Sunflower (Asteraceae)
AKA:
Photo taken on:
August 26, 2014
Location:
SR 285, NM/CO State line
Life Zones:
Plains and foothills
Habitat:
Roadsides, dry, open areas
Very similar in appearance to Pingue Rubberweed but on a much smaller scale. Grows to less than 10" high with up to 20 stems and 200 flower heads. The flowers are less than ½" across.
Flora of North America reference.