Boechera hoffmannii
| Hoffmann's rockcress | |
|---|---|
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Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Brassicales |
| Family: | Brassicaceae |
| Genus: | Boechera |
| Species: | B. hoffmannii
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| Binomial name | |
| Boechera hoffmannii (Munz) Al-Shehbaz
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| Synonyms | |
|
Arabis hoffmannii | |
Boechera hoffmannii (formerly Arabis hoffmannii) is a rare species of flowering plant in the family
Channel Islands of California, where it is known from only three or four populations on two of the eight islands.[2] A 2005 report estimated a remaining global population of 244 individual plants.[3] It is a federally listed endangered species
.
This is a
perennial herb producing one or more erect stems from a scaly, hairy caudex. The stems reach a maximum height between 50 and 70 centimeters and branch near the top. Leaves are densely clustered around the caudex in a basal rosette. They are lance-shaped, leathery with hairy undersides, and up to 10 centimeters long. There are more widely spaced leaves along the stem which are 3 to 6 centimeters long. The inflorescence bears many white or purple flowers with thick, dark sepals. The fruit is a tough, hairless silique
up to 10 centimeters long containing 2 rows of seeds.
The main threats to the existence of this rare plant are grazing and erosion caused by feral pigs and competition by invasive grasses.[2] The populations of this plant are also slow to reproduce. They are monocarpic, with each individual living for a few years, fruiting once, and then dying, and each population has relatively few actively reproducing individuals in any given year.[2]
References
- ^ "Hoffmann's rock-cress (Arabis hoffmannii)". United States Fish and Wildlife Service. Retrieved February 28, 2010.
- ^ a b c "Center for Plant Conservation Profile". Archived from the original on 2009-04-25. Retrieved 2008-09-16.
- ^ The Nature Conservancy
External links
-_Cardamine_flexuosa_inflorescence.jpg){kind=small} | This Brassicales article is a stub. You can help Wikipedia by expanding it. |