Steppe Agoseris - Agoseris parviflora
Other Names:
Agoseris glauca var. laciniata
Perennial 5–20 cm. Leaves linear-lanceolate, 3–15 cm long, deeply pinnately divided into 5–8 pairs of linear lobes. Herbage sparsely villous to tomentose. Involucres 2–3 cm long; phyllaries narrowly lanceolate, in ca. 2 series, green, glabrous to tomentose with a purple midvein. Rays yellow; ligules 8–15 mm long. Pappus 1–2 cm long. Achene body 5–7 mm long; beak 3–5 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Agoseris species in Montana share the following characteristics:
*Solitary flowerhead composed only of ray (ligulate) flowers; each ray tipped with 5 lobes.
*Single, long flowering stem (peduncle) that has milky sap;
*Leaves are only basal; each leaf with a simple blade that tapering to the stem (petiole).
Steppe Agoseris -
Agoseris parviflora*Life Span: Perennial
*Flowers (Corollas): Yellow
*Leaf Blades: Lobes divided half-way to the midvein.
*Involucral Bracts: Glabrous or tomentose.
*Achene Beak: Less than 6 mm long.
Large-flower Agoseris -
Agoseris grandiflora*Life Span: Perennial
*Flowers (Corollas): Yellow
*Leaf Blades: Lobes divided half-way to the midvein.
*Involucral Bracts: Villous on the margins.
*Achene Beak: At least 8 mm long.
Pale Agoseris -
Agoseris glauca*Life Span: Perennial
*Flowers (Corollas): Yellow
*Leaf Blades: Entire or with shallow lobes that are less than half-way to the midvein.
Annual Agoseris -
Agoseris heterophylla*Life Span: Annual
*Flowers (Corollas): Yellow
*Leaf Blades: Not lobed; entire to slightly dentate.
Orange Agoseris -
Agoseris aurantiaca*Life Span: Perennial
*Flowers (Corollas): Orange to pink, often drying light purple
*Leaf Blades: Entire, dentate, or with shallow lobes.
POLLINATORSThe following animal species have been reported as pollinators of this plant species or genus where their geographic ranges overlap:
Bombus bifarius and
Bombus insularis (Wilson et al. 2010).
