Sunday, February 28, 2016

Oxalis pes-caprae (Bermuda buttercup)

Oxalis pes-caprae is a common weed in vineyards of Southern Greece, Crete and other islands. It is a dicotyledonous plant of the family Oxalidaceae, order Geraniales.  This species also is well established in lowland California in disturbed garden soil.

Oxalis pes-caprae is an invasive pseudoannual plant that reproduces exclusively via offspring bulbs in the introduced range. This species is indigenous of South Africa and was introduced to Mediterranean countries at the beginning of the 19th century probably as an ornamental plant. This nearly flowering Oxalis, is incapable of setting seed but it has a prodigious capacity for vegetative multiplication through bulbil separation.

Oxalis pes-caprae is attractive when flowering but some people consider this species to be a nuisance when it spreads into shrubs.

The emergence of oxalis begins around the middle of October before the first autumn rains. The bulbs are unable to grow earlier because of their dormancy.

Flowering begins in early February and continues until April, depending on climatic conditions and location and it coincides with contractile root initiation.

These weeds have yellow, five-pettaled flowers and compound leaves. Each leaf consists of three heart-shaped leaflets resembling clover leaves.
Oxalis pes-caprae (Bermuda buttercup)

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