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coastal microseris, coastal silver puffs

Habit Plants annual, 5–30 cm; taproots slender.
Leaves

basal, 3–25 cm, linear to narrowly lanceolate or oblanceolate, bases tapering;

margins often pinnate with broad to linear lobes;

tips acuminate to bluntly rounded;

surfaces glabrous or mealy-pubescent.

Peduncles

leafless, mealy-pubescent.

Involucres

5–14 mm, glabrous.

Florets

5–75;

ligules shorter than or slightly exceeding involucres, yellow.

Phyllaries

in 2 unequal series, often purple-lined on midveins; inner equal, lanceolate;

tips acute or acuminate; outer deltoid-lanceolate; < inner.

Fruits

2.5–5.5 mm, brown or purplish;

ribs smooth; outer white-hairy.

Pappi

scales 5, lanceolate to ovate, 1–4 mm, brown to blackish; awns finely barbed.

2n

=18.

Microseris paludosa

Microseris bigelovii

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Sandy or rocky sites, dunes, coastal bluffs, bird-nesting islands. Flowering Apr–Jul. 0–100 m. Est. CA, WA; north to British Columbia. Native.

This is the only strictly coastal annual species of the genus. It is disjunct from Lincoln County to the southern tip of Vancouver Island, British Columbia, and adjacent San Juan Islands, Washington, probably due to long-range dispersal by birds. In parts of its range, it resembles Agoseris maritima in favoring coastal headlands and islands near seabird roosting sites.

Source Flora of Oregon, volume 2, page 312
Kenton Chambers
Sibling taxa
M. acuminata, M. bigelovii, M. borealis, M. douglasii, M. howellii, M. laciniata, M. nutans
M. acuminata, M. borealis, M. douglasii, M. howellii, M. laciniata, M. nutans
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