Dienstag, 26. April 2011

Plant of the Day (April 26th, 2011) - Geranium robertianum L. ssp. robertianum

Geranium robertianum L. ssp. robertianum (commonly known as “Robert Geranium” or “Red Robert” in English and “Ruprechtskraut” in German) is a member of the Geraniaceae family. Species from this family are also very popular as garden flowers.

G. robertianum L. ssp. robertianum

It's a small upright herb with pink petals. The whole flower is radial and five-parted (five sepals, five tepals and so on). The stamens are purple.

The leafs are divided deeply in 3 – 5 leaflets. The flower stem is very hairy (glandular hairs)

G. robertianum L. ssp. robertianum

Sometimes, G. robertianum L. ssp. robertianum is confused with Geranium purpureum Vill.; a neophyte that looks very similar. The best character to differ these species are the colour of the stamens. While the stamens of G. robertianum L. ssp. robertianum are purple, the stamens of G. purpureum are yellow.

I have studied the stamens of these individuals with my magnifying glass. They where purple, although they maybe seem to be yellow, but thats are only pollens.

G. robertianum L. ssp. robertianum

G. robertianum L. ssp. robertianum is very common in Europe. It can be found at wet places because it likes humidity and also at places with a hight content of nitrogen. In our garden, we've two places where the plants is growing very good. The first one is beside some rain barrels. Here, the plant grows out of cracks between the base plates. The other location is next to a bird bath.

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