Burke: Boechera glaucovalvula vs. Boechera pauciflora

	Boechera glaucovalvula	Boechera pauciflora
		Columbia rockcress, few-flowered rockcress, small-flowered rockcress
Habit		Short-lived perennial from a usually branched crown, the 1-several stems simple or branched above, 3-10 dm. tall, densely hairy below with stalked, branched to stellate hairs, usually glabrous above.
Leaves		Basal leaves numerous, 2-9 cm. long and 2-8 mm. broad, oblanceolate, the blade few-toothed to entire, densely hairy at least below with cross-shaped or stellate hairs, narrowed to a slender petiole; cauline leaves numerous, linear lanceolate to oblanceolate, 2-8 cm. long and 2-6 mm. broad, mostly auriculate and entire.
Flowers		Inflorescence a many-flowered raceme; pedicels 5-14 mm. long, glabrous to stellate; sepals 4, 3-6 mm. long, the outer 2 slightly gibbous-based; petals 4, white to deep red-violet, 6-14 mm. long; stamens 6; style none.
Fruits		Siliques 4-12 mm. long and 1.5-2 mm. broad, glabrous, 1-nerved nearly full length, curved, spreading to ascending; seeds in 1 series, 1.5-2 mm. long, with a wing up to 0.5 mm. broad.

	Boechera glaucovalvula	Boechera pauciflora
Flowering time		April-June
Habitat		Sagebrush and ponderosa pine openings.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington; British Columbia o California, east to Montana and Utah. [WildflowerSearch map] [BONAP county map]
Origin		Native
Conservation status		Not of concern
Sibling taxa	B. atrorubens, B. calderi, B. cascadensis, B. cusickii, B. divaricarpa, B. drepanoloba, B. grahamii, B. lemmonii, B. lyallii, B. microphylla, B. paddoensis, B. pauciflora, B. paupercula, B. pendulocarpa, B. polyantha, B. puberula, B. retrofracta, B. sparsiflora, B. stricta, B. suffrutescens	B. atrorubens, B. calderi, B. cascadensis, B. cusickii, B. divaricarpa, B. drepanoloba, B. grahamii, B. lemmonii, B. lyallii, B. microphylla, B. paddoensis, B. paupercula, B. pendulocarpa, B. polyantha, B. puberula, B. retrofracta, B. sparsiflora, B. stricta, B. suffrutescens
Web links	Local floras: CA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) 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) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Boechera glaucovalvula

Boechera pauciflora

Columbia rockcress, few-flowered rockcress, small-flowered rockcress

Habit

Short-lived perennial from a usually branched crown, the 1-several stems simple or branched above, 3-10 dm. tall, densely hairy below with stalked, branched to stellate hairs, usually glabrous above.

Leaves

Basal leaves numerous, 2-9 cm. long and 2-8 mm. broad, oblanceolate, the blade few-toothed to entire, densely hairy at least below with cross-shaped or stellate hairs, narrowed to a slender petiole;

cauline leaves numerous, linear lanceolate to oblanceolate, 2-8 cm. long and 2-6 mm. broad, mostly auriculate and entire.

Flowers

Inflorescence a many-flowered raceme;

pedicels 5-14 mm. long, glabrous to stellate;

sepals 4, 3-6 mm. long, the outer 2 slightly gibbous-based;

petals 4, white to deep red-violet, 6-14 mm. long;

stamens 6;

style none.

Fruits

Siliques 4-12 mm. long and 1.5-2 mm. broad, glabrous, 1-nerved nearly full length, curved, spreading to ascending;

seeds in 1 series, 1.5-2 mm. long, with a wing up to 0.5 mm. broad.