Common name: Guelder Rose
Scientific name: Viburnum opulus 歐洲莢蒾
Genus: Viburnum 莢蒾屬*
Family: Adoxaceae 五福花科, moschatel family
Remarks*: Viburnum was previously included in the Caprifoliaceae 忍冬科, the honeysuckle family. Based on molecular phylogeny, it is now placed in Adoxaceae 五福花科, moschatel family.
Origin: native
Date: 13th May
A deciduous shrub, can reach up to 4 m. Leaf blade is 5-8 cm, irregularly 3-lobed, glabrous above.
Underside of the leaves.
A pair of glands at the top of the petiole.
Photo enlarged below.
The disc shaped glands.
Stipules at the base of the petioles.
A pair of short petioles.
Stem is glabrous.
Outer bigger, sterile flowers bloom first.
The outer bigger white flowers are sterile.
The inner smaller, fertile flowers bloom later.
Almost all flowers in this inflorescence are flowering.
The branching pattern of the inflorescence.
Photo enlarged below to see the flower buds.
The flower buds and the bracteoles at the base of them.
Photo enlarged below.
The underside of the outer, sterile flower.
The 5 small, green sepals of the outer, sterile flower.
The front view of the outer, sterile flower. 5 petals.
Only 1 style with 3 stigmas are present at the centre of the sterile flower. Anthers are absent.
The inner fertile flowers.
The side view of the smaller, fertile flower.
White narrow bracteoles at the base of the flower.
The fertile flowers have 5 smaller petals, 5 stamens and 1 style with 3 stigmas.
The central, fertile flowers.
Photo enlarged below to see the details of the flower.
5 petals, 5 stamens and 1 style with 3 stigmas.
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