Castilleja angustifolia (Nutt.) G. Don
Desert Paintbrush, Painted Cup
Common paintbrush’ genus, Castilleja, is named for 18th century Spanish botanist Domingo Castillejo. Chromosa, meaning “color,” is a reference to the bright red flowerheads. If you’re interested in Castillejas, don’t miss Mark Egger’s superb photographic compilation on Flickr. See also this Castilleja comparison table.
Identification: Plants are less than 24" (60 cm) tall, sometimes as little as 4" (10 cm). Leaves are linear-lanceolate (long and narrow or shaped like a lance), composed of three to five narrow lobes, like fingers. They are ¾-2½" (2-7 cm) in length The intensely bright red (or red-orange or yellow) “flowers” are really bracts—modified leaves, each up to 1½" (3.8 cm) long. The real flowers are mostly hidden, tubular in shape, and yellow-green in color. They appear from May to September. Fruits are a two-chambered capsule. Unlike Castilleja angustifolia, this plant is found below 3200' (975 m); in fact, it is found below sea level, in Death Valley National Monument.
Castilleja angustifolia at Mark Egger’s Castilleja site on Flickr
Castilleja angustifolia on Northern Arizona Flora
Castilleja angustifolia at the United States National Parks Service
Castilleja angustifolia on Wildflowers, Ferns & Trees of Colorado, New Mexico, Arizona, and Utah
Castilleja angustifolia at the Lady Bird Johnson Wildflower Center
Castilleja angustifolia on the Madrean Archipelago Biodiversity Assessment
Castilleja angustifolia on DesertUSA: Exploring the Southwest
Castilleja angustifolia on SEINet—the Southwest Environmental Information Network
Castilleja angustifolia description by Thomas H. Kent, last updated 20 May 2018.