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Calycadenia truncata

Calycadenia truncata DC.

Oregon Western Rosinweed, Rosinweed

Asteraceae (Aster Family)

Synonym(s):

USDA Symbol: CATR3

USDA Native Status: L48 (N)

A slender, odorous plant with yellow flower heads in a narrow cluster and very narrow leaves; each upper leaf tipped with a broad, dish-shaped gland.

The genus name comes from the Greek kalyx ("cup") and adenos ("gland"), referring to the peculiar glands that distinguish all but one species of this genus found primarily in California. Rays on some species are white, changing to rose as they age.

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Plant Characteristics

Duration: Annual
Habit: Herb
Size Notes: Up to about 4 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: Yellow
Bloom Time: Mar , Apr , May , Jun , Jul , Aug , Sep , Oct , Nov

Distribution

USA: CA , OR
Native Distribution: Southern Oregon south to central California.
Native Habitat: Dry, sunny, sparsely grassy slopes.

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

Metadata

Record Modified: 2023-03-02
Research By: TWC Staff

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