|Mt. Gleason Indian paintbrush, Mt. Gleason paintbrush|
The following Participating Institutions are custodians for this species in the CPC National Collection:
Rancho Santa Ana Botanic Garden
The conservation of Castilleja gleasonii is fully sponsored.
Valerie Soza contributed to this Plant Profile.
This perennial hemiparasite (root parasite) is an endemic to the San Gabriel Mountains, with a limited range in the western part of the mountain range in the Mount Gleason area. Its scarlet inflorescence is showy like many other related paintbrushes, blooming from April to July, however this taxon is distinguished by the presence of branched hairs throughout (Mistretta and Brown 1987).
Distribution & Occurrence
Rocky, granitic places, 5000-7000 feet elevation, in yellow pine forest, lower montane coniferous forest, and pinyon and juniper woodland. Areas of gentle to moderate relief, in sandy or loamy, well-drained soils with some litter accumulation.
|Known from 6 general locations: Chilao/Horse Flats, Lightning Ridge, Little Rock Creek, Messenger Flats, Mount Gleason, and North Fork Pacoima Canyon. A total of at least 3700 individuals was observed in 1987 during surveys of all known populations except the North Fork Pacoima Canyon site (Mistretta 1994a, Mistretta and Brown 1987).|
Conservation, Ecology & Research
This species has been placed under Castilleja pruinosa in the current treatment in the Jepson Manual of California plants. Excluding Castilleja gleasonii locations, Castilleja pruinosa is known only from northern California and southern Oregon. Under the species description for Castilleja pruinosa, plants with wider calyx lobes from the San Gabriel Mountains are identified as having been called Castilleja gleasonii, which is probably a polyploid derivative/hybrid of C. affinis ssp. affinis and C. foliolosa. This group is recognized as a highly variable and confusing complex needing further study (Hickman 1993).
Allan, G.J.; Mistretta, O.; Tommerup, M.; Blassey, K.; Brown, W.J., Jr. 1995. A field guide to the rare plants of the Angeles National Forest. USDA Forest Service, Pacific Southwest Region, Angeles National Forest, in cooperation with Rancho Santa Ana Bot