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Oxalis acetosella [Wood Sorrel]


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#1 nfoto

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Posted 22 May 2015 - 19:45

Rørslett, B. 2015. Oxalis acetosella L. (Oxalidaceae) Wood Sorrel. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...la-wood-sorrel/

Oxalis acetosella L.

N : Gaukesyre; gjøksyre
SE: Harsyra; gökmat; harväppling; surklöver
DK: Skovsyre
FI: Käenkaali; Ketunleipä
IS: Sursmæra
DE: Wald-Sauerklee
GB: Wood Sorrel

This is a small, creping plant able to cover extensively the floor of coniferous and mixed forests, with a wide distribution in the Northern hemisphere. It flowers early, often in May. The entire plant contains oxalic acid that imparts a tangy taste to it and children love to chew the fresh plants in spring.

Attached Image: OXAL_ACE_B000513609_VIS.jpg
Image reference: OXAL_ACE_B000513609_VIS
Visible light: Nikon D1, AF Micro-Nikkor 105 mm f/2.8, daylight

Attached Image: OXAL_ACE_1105082776_UV.jpg
Image reference: OXAL_ACE_1105082776_UV
Ultraviolet light: Nikon D40X, UV-Nikkor 105 mm f/4.5, Baader U2" ("Venus" filter, internal), SB-140 flash

#2 colinbm

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Posted 23 May 2015 - 12:57

Interesting the differences in these flowers, Bjorn
Those leaves look dangerous ?
Col

Edited by colinbm, 23 May 2015 - 12:57.


#3 nfoto

    Former Fierce Bear of the North

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Posted 23 May 2015 - 13:31

Assured the foliage is entirely harmless and quite refreshing in early spring. I remember as a child we sought out these leaves and devoured them eagerly for their tangy taste. Made a perfect mix with sweetness of the young inflorescences of Noccea caerulescens (syn. Thlaspi alpestre), which often was found in the vicinity.

When the wood sorrel matures, the texture of the foliage becomes denser and less tempting to eat, plus the acidity increases to make eating the plant a doubtful experience. You learn quickly as a child.