About
Red Rock sunflower is a critically imperiled perennial known from just two desert springs in Nevada's Red Rock Canyon area, covering less than an acre.
Care at a glance
- Pet safety
- Not recorded. We have no source on whether this plant is safe for cats, dogs or other pets — that is not the same as safe. Keep it out of reach until you have checked.
- People
- Not recorded.
- Light
- Full sun gives the most flowers; partial shade is tolerated. General guidance for the genus
- Propagation
- Seed or stem cuttings. General guidance for the genus
“General guidance for the genus” marks advice sourced for the genus as a whole rather than this species.
Field notes
Morphology
Up to about 1 m tall, regrowing yearly from a woody base. Stems are hairless with a whitish waxy coat, and old white stems persist. Narrow, untoothed leaves have one main vein. Heads have 5–8 yellow rays.
Distribution & habitat
Endemic to Red Rock Canyon National Conservation Area, Clark County, Nevada, in the Mojave Desert, on moist alkaline soils at two springs, partly on private land.
History & etymology
Found during botanical surveys of the Spring Mountains in 2007 and later described as new. Genetic evidence places it closest to H. pumilus.
Conservation
Listed by Nevada as critically endangered and fully protected (2024). Threats include recreation, invasive weeds such as Sahara mustard and Russian thistle, and feral burros.
Habitat
- Altitude
- Not recorded
- Altitude class
- —
- Native to
- United States
Cultivation
- Difficulty
- Not recorded
Text adapted from Wikipedia, CC BY-SA 4.0.
Crossed H. devernii with another species?Register the cross. If it's not documented yet you'll be the first contributor; if someone already registered it, you'll be taken there to add your photo.