General:
Perennial herb from a somewhat woody stem-base; stems several, clustered, decumbent to erect, 5-20 cm tall, unbranched, more or less sticky-long-hairy, usually purplish.

Leaves:
Alternate, linear to lanceolate, 2-5 cm long, entire or sometimes the uppermost with a pair of small lateral lobes, sticky-hairy.

Flowers:
Inflorescence a prominently bracted terminal spike, at first compact, later elongating, the bracts pale yellow, oblong-egg-shaped, entire and rounded or with 1 to 2 pairs of small lobes near the top, long-hairy and glandular-short-hairy; corollas greenish, 18-30 mm long, 2-lipped, the upper lip beak-like, minutely hairy, 6-12 mm long, shorter than the tube and 3-4 times the length of the thickened, 3-toothed lower lip; calyces hairy, 15-25 mm long, 2-lobed, these primary lobes again divided into 2 blunt or sharp segments 1-4 mm long; stamens 4.

Fruits:
Capsules, 9-11 mm long; seeds many, the seed-coats loose, net-veined.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia

Synonyms and Alternate Names:
Castilleja acuminata auct. non (Pursh) Spreng.
Castilleja luteovirens Rydb.
Castilleja mogollonica Pennell
Castilleja pallida subsp. septentrionalis (Lindl.) Scoggan
Castilleja pallida var. septentrionalis (Lindl.) A. Gray
Castilleja rhexiifolia var. sulphurea (Rydb.) Atwood
Castilleja sulphurea Rydb.