OregonFlora: Spergularia macrotheca vs. Spergularia diandra

	Spergularia macrotheca	Spergularia diandra
	beach sand-spurrey, sticky sand-spurrey	alkali sand-spurrey
Habit		Plants annual; from slender taproots.
Stems		5–15 cm.
Leaves		axillary leaf clusters usually absent; blades linear, 6–23 mm, slightly fleshy; stipules inconspicuous, widely triangular, 1.5–2 mm; dull to silvery tan; tips acuminate.
Flowers		sepal lobes 2.3–3.1 mm, barely longer in fruit; petals white; stamens 4–7; styles 0.4–0.6 mm.
Seeds		0.4–0.6 mm; black; shiny; surface with low, elongate tubercles, not papillate, not winged.
2n		=18.

	Spergularia macrotheca	Spergularia diandra
Distribution	[WildflowerSearch map] [BONAP county map]	[BONAP county map]
Discussion		Basalt scabland, sand and gravel bars. Flowering May–Sep. 0–700 m. ECas, Owy, WV. WA, ID; north to British Columbia, northeast to Saskatchewan; Mediterranean Africa and Europe, southwestern Asia. Exotic.
Source		Flora of Oregon, volume 2, page 577 Rich Rabeler, Ronald Hartman
Sibling taxa	S. bocconi, S. canadensis, S. diandra, S. marina, S. media, S. rubra, S. villosa	S. bocconi, S. canadensis, S. macrotheca, S. marina, S. media, S. rubra, S. villosa
Subordinate taxa	S. macrotheca var. macrotheca
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: OR, WA Local Web sites: 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

Spergularia diandra

beach sand-spurrey, sticky sand-spurrey

alkali sand-spurrey

Habit

Plants annual; from slender taproots.

Stems

5–15 cm.

Leaves

axillary leaf clusters usually absent;

blades linear, 6–23 mm, slightly fleshy;

stipules inconspicuous, widely triangular, 1.5–2 mm; dull to silvery tan;

tips acuminate.

Flowers

sepal lobes 2.3–3.1 mm, barely longer in fruit;

petals white;

stamens 4–7;

styles 0.4–0.6 mm.

Seeds

0.4–0.6 mm; black; shiny;

surface with low, elongate tubercles, not papillate, not winged.

=18.

Spergularia diandra

Distribution

[WildflowerSearch map]

[BONAP county map]

Discussion

Basalt scabland, sand and gravel bars. Flowering May–Sep. 0–700 m. ECas, Owy, WV. WA, ID; north to British Columbia, northeast to Saskatchewan; Mediterranean Africa and Europe, southwestern Asia. Exotic.

Source

Flora of Oregon, volume 2, page 577
Rich Rabeler, Ronald Hartman

Sibling taxa