Burke: Atriplex obovata vs. Atriplex rosea

	Atriplex obovata	Atriplex rosea
		red orach, tumbling orach
Habit		Monoecious, erect, freely-branched to simple annual, 2-12 dm. tall, grayish with a mealy coating at least on the lower surface of the leaves.
Leaves		Leaves alternate, petiolate or the upper sessile, lanceolate to ovate, 2-5 cm. long, the blades wavy-dentate and often slightly hastate, tapered or rounded at the base.
Flowers		Flowers glomerate in the leaf axils and on short axillary and terminal spikes, the staminate above the pistillate; staminate flowers with a 5-parted perianth; pistillate flowers without a perianth, with 2 subtending bracts which are fused less than half their length, triangular or nearly orbicular, strongly flattened, 4-8 mm. long, acute at the tip, the margins dentate, the sides with sharp projections.
Fruits		Utricle

	Atriplex obovata	Atriplex rosea
Flowering time		July-September
Habitat		Weedy species of irrigated land and roadsides.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Great Plains; also in scattered locations in central and eastern U.S. [WildflowerSearch map] [BONAP county map]
Origin		Introduced from Eurasia
Conservation status		Not of concern
Sibling taxa	A. argentea, A. canescens, A. dioica, A. gardneri, A. gmelinii, A. heterosperma, A. hortensis, A. littoralis, A. longipes, A. oblongifolia, A. patula, A. prostrata, A. rosea, A. semibaccata, A. truncata	A. argentea, A. canescens, A. dioica, A. gardneri, A. gmelinii, A. heterosperma, A. hortensis, A. littoralis, A. longipes, A. oblongifolia, A. patula, A. prostrata, A. semibaccata, A. truncata
Web links	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	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

Atriplex obovata

Atriplex rosea

red orach, tumbling orach

Habit

Monoecious, erect, freely-branched to simple annual, 2-12 dm. tall, grayish with a mealy coating at least on the lower surface of the leaves.

Leaves

Leaves alternate, petiolate or the upper sessile, lanceolate to ovate, 2-5 cm. long, the blades wavy-dentate and often slightly hastate, tapered or rounded at the base.

Flowers

Flowers glomerate in the leaf axils and on short axillary and terminal spikes, the staminate above the pistillate; staminate flowers with a 5-parted perianth; pistillate flowers without a perianth, with 2 subtending bracts which are fused less than half their length, triangular or nearly orbicular, strongly flattened, 4-8 mm. long, acute at the tip, the margins dentate, the sides with sharp projections.

Fruits

Utricle

Atriplex obovata

Atriplex rosea

Flowering time

July-September

Habitat

Weedy species of irrigated land and roadsides.

Distribution

[WildflowerSearch map]

[BONAP county map]

Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Great Plains; also in scattered locations in central and eastern U.S.

[WildflowerSearch map]

[BONAP county map]

Origin

Introduced from Eurasia

Conservation status

Not of concern

Sibling taxa