Samstag, 2. Juli 2011

Plants of the Day (July 2nd, 2011) - Cornus sanguinea L. and Cornus sericea L.

So folks, today I've two plants for you, because they are very similar and one article fort both of them makes more sense. This plants are Cornus sanguinea L. (“Common Dogwood” or “Blutroter Hartriegel”) and Cornus sericea L. (“Red Osier Dogwood” or “Weißer Hartriegel”) Both are plants from the the Genus Cornus of the Cornaceae family.

C. sanguinea - leaves and flowers

C. sericea - leaves and young fruits

C. sanguninea is a shrub with heights between 2 and 5 metres (6,6 to 16,4 feet), while C. sericea is a little bit smaller with heights between 1 and 3 metres (3,3 to 9,8 feet). The branches of both species are red overflowed. 
 
In both cases, the inflorescence is a umbel-like panicle without any bracts and whith white petals. The flowers appear after the leaves. The fruits of C. sericea are white, while the fruits of C. sanguinea are deep blue (nearly black).

 C. sanguinea - inflorescence


The best way to differ these two species are their leaves. The leaves of C. sanguninea are more eliptical and have 3 – 4 pairs of leaf-veins, while the leaves of C. sercia are lanceolate and pointed. They have also 5 – 7 pairs of leaf-veins.

 C. sericea - leaf (7 pairs of leaf-veins)

 C. sanguinea - leaf (4 pairs of leaf-veins)

C. sericea is native to North America and a Neophyte in Europe. C. sanguinea is native to Europe and part of the Middle East (e. g. Turkey). Both species prefer fresh soils, but C. sanguinea grows better on acid soils, while C. sericea needs nutrient-rich ones. Both species can be found at lake sides or the edges of woods. They are also very popular as garden plants for the hedge.

 C. sericea - leaves and flowers

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