Burke: Castilleja attenuata vs. Castilleja tenuis

	Castilleja attenuata	Castilleja tenuis
	attenuate paintbrush, valley-tassels	thin paintbrush
Habit	Slender annual 1-3.5 dm. tall, the stem usually simple, the herbage with short, stiff spreading hairs throughout.	Annual, the stem 1-4 dm. tall, usually simple; herbage spreading-hairy throughout, with hairs up to 2 mm. long in the inflorescence.
Leaves	Leaves alternate, all cauline, narrowly lance-linear, long-tapered to the base, 2-6 cm. long, entire or the upper 3-cleft.	Leaves alternate, all cauline, 1-4 cm. long, the lower linear and entire, the upper a little wider and 3-5 cleft, the segments narrow.
Flowers	Inflorescence elongate and narrow, the bracts becoming shorter and more cleft than the leaves, white or yellowish; calyx equally lobed; corolla 1-2.5 cm. long, linear, whitish to pinkish, the lower lip more yellowish with some purple spots; teeth of the lower lip erect, slender, nearly equaling the galea	Inflorescence a terminal spike; bracts gradually differentiated from the leaves, becoming shorter and more cleft, usually green throughout; calyx 2-cleft, with bifid segments; corolla off-white or pale yellow, 12-20 mm. long, exerted, the lower lip inflated and tri-saccate, with inconspicuous teeth; the upper lip straight, 1-2 mm. longer than the lower lip; stamens 4, attached near the top of the corolla tube.
Fruits	Capsule.	Capsule.

	Castilleja attenuata	Castilleja tenuis
Flowering time	April-June	May-August
Habitat	Drier areas at low elevations.	Vernally moist meadows and other moist sites, from the lowlands to moderate elevations in the mountains.
Distribution	Occurring chiefly west of the Cascades crest in Washington; British Columbia to California and Arizona. [WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington; British Columbia to California, east to Idaho and Nevada.. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	C. ambigua, C. cervina, C. chambersii, C. cryptantha, C. cusickii, C. elmeri, C. exserta, C. hispida, C. levisecta, C. litoralis, C. lutescens, C. miniata, C. minor, C. parviflora, C. rupicola, C. suksdorfii, C. tenuis, C. thompsonii, C. victoriae	C. ambigua, C. attenuata, C. cervina, C. chambersii, C. cryptantha, C. cusickii, C. elmeri, C. exserta, C. hispida, C. levisecta, C. litoralis, C. lutescens, C. miniata, C. minor, C. parviflora, C. rupicola, C. suksdorfii, C. thompsonii, C. victoriae
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: 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

Castilleja attenuata

Castilleja tenuis

attenuate paintbrush, valley-tassels

thin paintbrush

Habit

Slender annual 1-3.5 dm. tall, the stem usually simple, the herbage with short, stiff spreading hairs throughout.

Annual, the stem 1-4 dm. tall, usually simple; herbage spreading-hairy throughout, with hairs up to 2 mm. long in the inflorescence.

Leaves

Leaves alternate, all cauline, narrowly lance-linear, long-tapered to the base, 2-6 cm. long, entire or the upper 3-cleft.

Leaves alternate, all cauline, 1-4 cm. long, the lower linear and entire, the upper a little wider and 3-5 cleft, the segments narrow.

Flowers

Inflorescence elongate and narrow, the bracts becoming shorter and more cleft than the leaves, white or yellowish;

calyx equally lobed;

corolla 1-2.5 cm. long, linear, whitish to pinkish, the lower lip more yellowish with some purple spots;

teeth of the lower lip erect, slender, nearly equaling the galea

Inflorescence a terminal spike;

bracts gradually differentiated from the leaves, becoming shorter and more cleft, usually green throughout;

calyx 2-cleft, with bifid segments;

corolla off-white or pale yellow, 12-20 mm. long, exerted, the lower lip inflated and tri-saccate, with inconspicuous teeth; the upper lip straight, 1-2 mm. longer than the lower lip;

stamens 4, attached near the top of the corolla tube.

Fruits

Capsule.