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Agoseris retrorsa - Greene

Common Name Spearleaf Agoseris
Family Asteraceae
USDA hardiness 4-8
Known Hazards Bitterness and latex limit palatability; as with many composites, sensitive individuals may experience digestive upset or contact irritation. Use in modest amounts.
Habitats Open dry to mesic mountain habitats.
Range Native to western North America, including parts of the Intermountain West and Sierra/Cascades.
Edibility Rating    (3 of 5)
Other Uses    (1 of 5)
Weed Potential No
Medicinal Rating    (0 of 5)
Care (info)
Fully Hardy Well drained soil Moist Soil Semi-shade Full sun
Agoseris retrorsa Spearleaf Agoseris


tomhilton Creative Commons Attribution 2.0
Agoseris retrorsa Spearleaf Agoseris
(c) 2009 Barry Breckling, some rights reserved (CC BY-NC-SA)

 

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Summary

Agoseris retrorsa is a perennial or biennial composite of dry mountain and foothill habitats, resembling a rangier wild dandelion with spear-shaped leaves and showy yellow heads. Like dandelion, the young leaves and roots are edible with caveats around bitterness and latex. As a trail snack or salad accent, it is serviceable; as a staple it is modest. USDA Zones approximately 4–8, height 10–40 cm, forming basal rosettes. Young leaves and occasionally roots are edible but bitter. Edibility rating: ~2.5/5.


Physical Characteristics

 icon of manicon of flower
Agoseris retrorsa is a PERENNIAL growing to 0.3 m (1ft) by 0.3 m (1ft in) at a fast rate.
See above for USDA hardiness. It is hardy to UK zone 5 and is not frost tender. The flowers are pollinated by Bees, Insects.
It is noted for attracting wildlife.
Suitable for: light (sandy) and medium (loamy) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil and can tolerate drought.

UK Hardiness Map US Hardiness Map

Synonyms

Heterotypic Synonyms: Agoseris retrorsa Kuntze. Macrorhynchus angustifolius Kellogg. Macrorhynchus retrorsus Benth. Troximon retrorsum A.Gray.

Plant Habitats

Edible Uses

The roots, leaves, and flowers are all edible. Leaves resemble those of dandelion in taste and texture: mild, lettuce-like, but with bitterness that is improved by cooking [2-3]. The roots are edible but not well documented in terms of flavor; they are assumed to be similar to dandelion roots, which are bitter but usable when cooked or roasted [2-3]. The flowers can be eaten raw or cooked, adding color and mild flavor to salads or as a garnish [2-3]. Edible Uses & Rating: Edible parts include young leaves as salad/potherb and roots as a bitter, coffee-substitute type material. Because of strong bitterness and latex, it earns an edibility rating of 2.5/5: usable, but not a primary or pleasant staple. Taste, Processing & Kitchen Notes: Leaves are mildly to strongly bitter, especially with age. Young rosette leaves can be eaten raw in small amounts or blanched to reduce bitterness. Roots are tough and strongly bitter-resinous; they can be roasted and used in small proportions in “coffee” blends or broths. Overmature plants are generally too bitter to be worthwhile. Seasonality (Phenology): Rosettes emerge in spring as snow recedes; flowering typically late spring to mid-summer; seed set and senescence follow as soils dry. Young edible leaves are best very early in the season. Safety & Cautions (Food Use): Bitterness and latex limit palatability; as with many composites, sensitive individuals may experience digestive upset or contact irritation. Use in modest amounts. Harvest & Processing Workflow: Clip young leaves early; rinse and eat fresh or lightly blanch. If using roots, harvest from second-year plants before flowering, scrub, slice, and roast to deepen flavor and reduce latex. Look-Alikes & Confusion Risks: Similar to dandelion (Taraxacum), hawkbits, and other ligulate composites. Ensure ID to avoid mildly toxic look-alikes, and note that most “false dandelions” are more bitter than Taraxacum. Traditional/Indigenous Use Summary: Various Agoseris species were used traditionally as minor greens or medicinally; A. retrorsa fits that pattern as a minor supplemental plant rather than a staple.

References   More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.


None Known

References   More on Medicinal Uses

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Other Uses

Ecology & Wildlife: Flower heads are visited and pollinated primarily by bees, small native solitary bees, syrphid flies, and butterflies. Seeds feed small birds and rodents. Latex and bitterness deter heavy grazing, but some herbivores browse young foliage. A small, serviceable wild green and coffee-root analogue for high-country foragers, more of a curiosity than a cornerstone.

Special Uses

References   More on Other Uses

Cultivation details

Identification & Habit: Plants form a basal rosette of oblanceolate to spear-shaped leaves, often with coarse lobes or teeth. Leaves exude milky latex when broken. Flower stalks are leafless, topped by single yellow ligulate heads very similar to a dandelion but often on longer, more slender scapes. Fruits are beaked achenes with a well-developed pappus. The habit is low and tufted, often scattered in open, gravelly ground. Prefers full sun to light shade in well-drained, often rocky or sandy soils in open forests, sagebrush, and montane meadows. Tolerant of summer drought after seed set. Habitat & Range: Native to western North America, including parts of the Intermountain West and Sierra/Cascades, in open dry to mesic mountain habitats. Size & Landscape Performance: Stays compact; visually modest except in bloom. In gardens, it behaves like a small wildflower; not aggressive, best in naturalistic plantings. Cultivation (Horticulture): Sow seed in fall or early spring in situ; avoid overwatering. It prefers lean soils and minimal disturbance. Not a common cultivated species, but manageable. Pests & Problems: Few serious issues; can be grazed out or shaded out. Occasional insect larvae in flower heads. Cultivar/Selection Notes: No named cultivars.

References   Carbon Farming Information and Carbon Sequestration Information

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Plant Propagation

By seed; no special pretreatment usually necessary. Division is not standard due to taprooted habit.

Other Names

If available other names are mentioned here

Spearleaf mountain dandelion, Agoseris retrorsa, Spearleaf Agoseris, False Dandelion

Native Range

Arizona, California, Mexico Northwest, Nevada, Oregon, Utah, Washington

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it's worth checking.

Low; native, locally common but not strongly invasive in intact habitats.

Conservation Status

IUCN Red List of Threatened Plants Status : Not available

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Agoseris aurantiacaMountain Dandelion, Orange agoserisPerennial0.6 0-0  LmNDM310
Agoseris glaucaMountain Dandelion, Pale agoseris, False agoserisPerennial0.6 0-0  LmNDM311

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Author

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Botanical References

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