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Erysimum teretifolium
Also called Ben Lomond Wallflower
A rare, endangered wildflower endemic to the Zayante sandhills of Santa Cruz County, California, that grows as a biennial or short-lived perennial herb with yellow flowers. It is not a common garden plant; its key needs are open, sandy, well-drained ground with little leaf litter.
Erysimum teretifolium is a species of Erysimum known by the common names Santa Cruz wallflower and Ben Lomond wallflower. It is a very rare plant endemic to Santa Cruz County, California, where it grows on inland sand spits, chaparral, and sandstone deposits in the southern Santa Cruz Mountains. It is a California state and federally listed endangered species.
This plant is a biennial or perennial herb with one or more unbranched erect dark reddish-purple stems reaching anywhere from 15 centimetres (5.9 in) to nearly 1 metre (39 in) in height. There are a few straight, somewhat toothed, dark greenish leaves along the stems. At the tops of the stems are thin clusters of flowers with rounded bright to dark yellow or orangish petals, each 1–2 centimetres (0.39–0.79 in) long.
This species is found only within a strip of land measuring 9 by 5 miles (14.5 km × 8.0 km). Or the Zayante sandhills of Santa Cruz County, California. This is a rare dune environment found inland, characterized by deep sandy soils high in quartz content and generally open with vegetation. The sand hills have a variety of endemic species, like Chorizanthe pungens var. hartwegian, and Hesperocyparis abramsiana var. abramsiana, and are considered to be an area of conservation concern. The plant is mainly threatened by coastal and inland development in the area and mining of the sand it lives in. About 75% of the remaining plants grow on land belonging to a sand mining company. Fire suppression has also altered the habitat to the detriment of the plant; leaf and needle litter builds up while the plant requires stretches of open sand. Urban development is another threat, destroying habitat and leading to habitat fragmentation.
Coast wallflower · Cascade wallflower · Western wallflower · Erysimum baeticum · Cape Verde Wallflower · Erysimum canescens · Sanddune wallflower · Erysimum cazorlense · Wormseed wallflower · Wallflower · Erysimum collinum · Erysimum crepidifolium
Text excerpted from the Wikipedia article Erysimum teretifolium by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
