UW Burke Herbarium species comparison

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Agoseris heterophylla

Agoseris monticola

annual agoseris

mountain agoseris, Sierra Nevada agoseris
Habit Scapose, slender annual, usually glabrous, often with several scapes from the base, 3-40 cm. tall, with milky juice. Scapose perennial, 10-25 cm. tall, with milky juice; pubescence chiefly around the involucre, consisting partly of glandular, translucent hairs.
Leaves

Leaves oblanceolate, toothed or pinnatifid to entire, up to 15 cm. long and 1.5 cm. wide, mostly basal, but a few on the base of the stem.

Leaves glabrous or evenly short hairy, linear-lanceolate, 5-20 cm. long, acute or acuminate, occasionally laciniate.
Flowers

Heads solitary, small;

involucre 5-13 mm. high in flower, elongating in fruit, with a few soft hairs;

corollas all ligulate, yellow.

Heads solitary;

involucre 1-2 cm. high, the bracts in three length classes, the outer considerably shorter, acute;

corollas all ligulate, yellow;

pappus 10-11 mm. long.
Fruits

Achene body 2-5 mm. long, prominently ribbed or winged, tapering to a slender beak 2-3 times as long.

Achenes 5-8 mm. long, the body tapering to a stout, striate beak up to half as long as the body.

Agoseris heterophylla

Agoseris monticola
Flowering time April-July July-August
Habitat Dry, open areas at low to mid-elevations. Mesic meadows in the subalpine and alpine, often in soils of volcanic origin.
Distribution
Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Idaho, Montana, Utah, and Arizona.
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in Washington; Washington to California, east to Nevada.
[WildflowerSearch map]
[BONAP county map]
Origin Native Native
Conservation status Not of concern Not of concern
Sibling taxa
A. ×agrestis, A. apargioides, A. aurantiaca, A. ×elata, A. glauca, A. grandiflora, A. monticola, A. retrorsa
A. ×agrestis, A. apargioides, A. aurantiaca, A. ×elata, A. glauca, A. grandiflora, A. heterophylla, A. retrorsa
Subordinate taxa
A. heterophylla var. heterophylla
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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