buckthorn

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buck·thorn

(bŭk'thōrn),
Shrub or tree of family Rhamnaceae, Karwinskia humboldtiana commonly called Coyotillo or Tullidora. Found in arid southwestern U.S. environments; uncharacterized neurotoxin with high toxicity; single intake of just 0.05-0.3% by body weight in plant material; fruit is particularly toxic. Impaired cerebellar and peripheral nerve function is characteristic; clinical signs include hypersensitivity, tremors, abnormal gait, progressing to paralysis especially in hind quarters; pulmonary edema in some cases also. Toxin produces progressive polyneuropathy through segmental demyelination and degenerative changes in axons of peripheral nerves, followed by myodegeneration.
See also: polyneuropathy.

buckthorn

(bŭk′thôrn′)
n.
1. Any of various shrubs or small trees of the genera Rhamnus and Frangula, including several ornamentals, medicinal species such as the cascara buckthorn, and the invasive species R. cathartica.
2. See bumelia.

alder buckthorn

A deciduous shrub, the bark of which contains anthraquinones; it has laxative activity and has been used internally by herbalists for constipation, and topically for minor cuts.
Toxicity Prolonged use may evoke a “lazy bowel” syndrome; it should not be used in patients with colitis, haemorrhoids, or gastric ulcers, or in pregnancy or during nursing.

buck·thorn

(bŭk'thōrn)
Shrub or tree offamily Rhamnaceae, Karwinskia humbold tiana, commonly called coyotillo or tullidora. Found in arid southwestern U.S. environments; contains a highly potent neurotoxin.
See also: polyneuropathy
Synonym(s): common buckthorn, waythorn.
References in periodicals archive ?
Rapid in-stream decomposition of leaves of common buckthorn (Rhamnus cathartica), an invasive tree species.
Ecology and ecosystem impacts of common buckthorn (Rhamnus cathartica): a review.
(common buckthorn) as an ecosystem dominant in southern Wisconsin forests.
Like white mulberry, common buckthorn is spread by fruit-eating birds (Schierenbeck, 2004; Knight et al., 2007).
The species that are dispersed by fruit-eating birds, white mulberry and common buckthorn, may become particularly successful invaders.