Burke: Boechera puberula

	Boechera puberula
	Blue Mountain rockcress, hoary rockcress
Habit	Short-lived perennials, from a crown not woody; stems simple from each caudex branch, 20-63 cm tall, pubescence dense near base with short-stalked trichomes, 3-8-rayed, to 0.3 mm, pubescence similar towards ends of stems.
Leaves	Basal leaves oblanceolate to narrowly oblanceolate, 1.5-5 mm broad, margins typically toothed, not ciliate, densely pubescent above and beneath with 5-12-rayed trichomes on short-stalks and up to 0.2 mm; cauline leaves 7-45, hiding the stem near base, lobe-like appendages at base absent or 0.7-3 mm, surfaces pubescent towards ends of stems.
Flowers	Inflorescence usually 10-40-flowered, typically unbranched racemes; fruiting pedicels pendent, curving downward towards ends to horizontally spreading to ascending at base, 4-10 mm, pubescent with trichomes appressed and branched, occasionally slightly secund; flowers ascending to descending; sepals 4, pubescent; petals 4, white to pale purple, 5-9 mm long and 0.8-1.8 mm broad, glabrous; pollen ellipsoid.
Fruits	Siliques 3-6.5 cm long and 1.9-2.2 mm broad, closely pendent, uncommonly appressed to rachis, generally not curved, with parallel edges; valves pubescent; seeds in 1 series, 1.4-1.8 mm long and 1-1.4 mm broad, with a continuous wing to 0.3 mm broad.

	Boechera puberula
Flowering time	May-July
Habitat	Rocky slopes and hillsides among sagebrush or open woodlands.
Distribution	Occurring east of the Cascades crest in Washington; Washington to California, east to southern Idaho 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. retrofracta, B. sparsiflora, B. stricta, B. suffrutescens
Web links	Local floras: 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 puberula

Blue Mountain rockcress, hoary rockcress

Habit

Short-lived perennials, from a crown not woody; stems simple from each caudex branch, 20-63 cm tall, pubescence dense near base with short-stalked trichomes, 3-8-rayed, to 0.3 mm, pubescence similar towards ends of stems.

Leaves

Basal leaves oblanceolate to narrowly oblanceolate, 1.5-5 mm broad, margins typically toothed, not ciliate, densely pubescent above and beneath with 5-12-rayed trichomes on short-stalks and up to 0.2 mm;

cauline leaves 7-45, hiding the stem near base, lobe-like appendages at base absent or 0.7-3 mm, surfaces pubescent towards ends of stems.

Flowers

Inflorescence usually 10-40-flowered, typically unbranched racemes; fruiting pedicels pendent, curving downward towards ends to horizontally spreading to ascending at base, 4-10 mm, pubescent with trichomes appressed and branched, occasionally slightly secund;

flowers ascending to descending;

sepals 4, pubescent;

petals 4, white to pale purple, 5-9 mm long and 0.8-1.8 mm broad, glabrous;

pollen ellipsoid.

Fruits

Siliques 3-6.5 cm long and 1.9-2.2 mm broad, closely pendent, uncommonly appressed to rachis, generally not curved, with parallel edges;

valves pubescent;

seeds in 1 series, 1.4-1.8 mm long and 1-1.4 mm broad, with a continuous wing to 0.3 mm broad.