Asteraceae

Annual agoseris

Agoseris heterophylla (Nutt.) Greene

Family: Asteraceae
Genus: Agoseris

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Annual agoseris (Agoseris heterophylla) — FlowerPhoto: Alexander Wentworth, CC BY 4.0, from iNaturalist

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Common names

By language (1)

English: Annual agoseris

Synonyms

Agoseris californica (Nutt.) Hoover
Agoseris greeneana Kuntze
Agoseris heterophylla subsp. californica Piper
Agoseris heterophylla subsp. heterophylla
Agoseris heterophylla subsp. normalis Piper
Agoseris heterophylla var. crenulata (H.M.Hall) Jeps.
Agoseris heterophylla var. kymapleura Greene
Agoseris heterophylla var. quentinii G.I.Baird
Agoseris heterophylla var. turgida (H.M.Hall) Jeps.
Agoseris major Jeps. ex Greene
Cryptopleura californica Nutt.
Kymapleura heterophylla Nutt. ex Torr. & A.Gray
Macrorhynchus californicus (Nutt.) Torr. & A.Gray
Macrorhynchus heterophyllus Nutt.
Microrhynchus heterophyllus Nutt.
Troximon elatum Greene
Troximon heterophyllum (Nutt.) Greene
Troximon heterophyllum f. crenulatum H.M.Hall
Troximon heterophyllum f. cryptopleurum (Greene) H.M.Hall
Troximon heterophyllum f. heterophyllum
Troximon heterophyllum f. idiale H.M.Hall
Troximon heterophyllum f. turgidum H.M.Hall
Troximon heterophyllum subsp. heterophyllum
Troximon heterophyllum var. californicum (Nutt.) H.M.Hall
Troximon heterophyllum var. cryptopleura Greene
Troximon heterophyllum var. cryptopleuroides Suksd.
Troximon heterophyllum var. glabratum Suksd.
Troximon heterophyllum var. heterophyllum
Troximon heterophyllum var. kymapleura Greene

Flowers

In flower: March to May (from 301 flowering iNaturalist observations worldwide)

Characteristics

Growth habit: Forb/herb
Lifespan: Annual
In the US and Canada: Canada: native, Lower 48 states: native

Photos

FlowerPhoto: Alexander Wentworth, CC BY 4.0, from iNaturalist
FlowerPhoto: Dan Fitzgerald (Fitz), CC0, from iNaturalist
FlowerPhoto: Ken-ichi Ueda, CC BY 4.0, from iNaturalist
FlowerPhoto: George Williams, CC BY 4.0, from iNaturalist
Photo: Walter Siegmund, CC BY-SA 3.0, from Wikimedia Commons
Photo: Walter Siegmund, CC BY-SA 3.0, from Wikimedia Commons
Photo: Walter Siegmund, CC BY-SA 3.0, from Wikimedia Commons
Photo: Felicia Gershberg, CC BY 4.0, from iNaturalist
Photo: Thayne Tuason, CC BY-SA 4.0, from Wikimedia Commons
Photo: Daniel Levitis, CC BY 4.0, from iNaturalist
Photo: Thayne Tuason, CC BY-SA 4.0, from Wikimedia Commons
Photo: Alex Heyman, CC0, from iNaturalist

More in Agoseris

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.