OregonFlora: Lasthenia maritima

	Lasthenia maritima
	maritime goldfields, seaside goldfields
Habit	Plants annual, 3–40 cm; taproots slender.
Stems	lightly villous proximally, densely villous distally.
Leaves	linear to narrowly or broadly elliptic, 15–55 × 2–18 mm; margins regularly or irregularly dentate or lobed; teeth triangular; lobes linear; tips obtuse; surfaces glabrous to lightly villous.
Involucres	hemispheric, 4–6 mm; surfaces lightly villous.
Ray florets	few, inconspicuous; corollas 3–5 mm, yellow, slightly exceeding involucres.
Disc florets	20–100+; corollas 1.5–2 mm, yellow; stamens included; styles included.
Phyllaries	5–8, not united; ovate; tips acute to obtuse.
Fruits	2.5–3 mm; black or grayish, minutely puberulent, pappi of 0–10+ scales and awns; up to 2 mm.
Heads	radiate; peduncles 0.4–6 cm; surfaces villous.
2n	=8.

	Lasthenia maritima
Distribution	[WildflowerSearch map] [BONAP county map]
Discussion	Rocky headlands, offshore islands. Flowering May–Jul. 0–50 m. Est. CA, WA, north to BC. Native. The peculiar habitat of this species was first noted by Ornduff (1966), who considered it an adaptation to sites rich in bird guano. Like L. glaberrima, L. maritima is a self-pollinating species whose fruits are probably dispersed by migrating birds.
Source	Flora of Oregon, volume 2, page 300 Kenton Chambers
Sibling taxa	L. californica, L. glaberrima, L. ornduffii
Synonyms	Baeria maritima, Baeria minor ssp. maritima, Lasthenia minor, Lasthenia minor var. maritima
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Lasthenia maritima

maritime goldfields, seaside goldfields

Habit

Plants annual, 3–40 cm; taproots slender.

Stems

lightly villous proximally, densely villous distally.

Leaves

linear to narrowly or broadly elliptic, 15–55 × 2–18 mm;

margins regularly or irregularly dentate or lobed;

teeth triangular;

lobes linear;

tips obtuse;

surfaces glabrous to lightly villous.

Involucres

hemispheric, 4–6 mm;

surfaces lightly villous.

Ray florets

few, inconspicuous;

corollas 3–5 mm, yellow, slightly exceeding involucres.

Disc florets

20–100+;

corollas 1.5–2 mm, yellow;

stamens included;

styles included.

Phyllaries

5–8, not united; ovate;

tips acute to obtuse.

Fruits

2.5–3 mm; black or grayish, minutely puberulent, pappi of 0–10+ scales and awns; up to 2 mm.

Heads

radiate;

peduncles 0.4–6 cm;

surfaces villous.

=8.

Lasthenia maritima

Distribution

[WildflowerSearch map]

[BONAP county map]

Discussion

Rocky headlands, offshore islands. Flowering May–Jul. 0–50 m. Est. CA, WA, north to BC. Native.

The peculiar habitat of this species was first noted by Ornduff (1966), who considered it an adaptation to sites rich in bird guano. Like L. glaberrima, L. maritima is a self-pollinating species whose fruits are probably dispersed by migrating birds.

Source

Flora of Oregon, volume 2, page 300
Kenton Chambers

Sibling taxa

L. californica, L. glaberrima, L. ornduffii

Synonyms

Baeria maritima, Baeria minor ssp. maritima, Lasthenia minor, Lasthenia minor var. maritima

Web links