Thursday, January 28, 2016

Oxalis pes-caprae (Bermuda Buttercup, African Woodsorrel) - Non-Native

4/12/03 Eaton Canyon Trail, San Gabriel Mountains, Los Angeles County, CA 

 4/13/02 Upper Newport Bay Ecological Reserve, Orange County, CA

4/8/01 Eaton Canyon Trail


COMMON NAME: Bermuda Buttercup, African Woodsorrel

SPECIES: Oxalis pes-caprae

FAMILY: Oxalidaceae (Oxalis/Wood Sorrel Family)


LOCATION: Eaton Canyon Trail, San Gabriel Mountains, Los Angeles County, CA


The Oxalis pes-caprae flower is actinomorphic, with a calyx composed of five free or slightly fused sepals, a sympetalous corolla composed of five fused petals, an apoandrous androecium composed of ten free stamens in two ranks, and a compound pistil. Like most African Oxalis species, it produces adventitious subterranean propagules. These take the form of true bulbs in botanical terms, which is unusual among dicotyledons. In fact, Oxalis pes-caprae produces small bulbs copiously, whereas most other African species produce fewer, larger bulbs. New world Oxalis, such as Oxalis corniculata, apparently do not generally produce bulbs.

Invasive species[edit]

Indigenous to South Africa, Oxalis pes-caprae, the "Bermuda buttercup", is an invasive species and noxious weed in many other parts of the world, including the United States (particularly coastal California),[2] EuropeIsrael and Australia.[3]

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