Rosebay willowherb

ian Plants for Bees , ,

Rosebay Willowherb : Chamerion angustifolium

Plant :  Flowering towards the end of the season, it is a good source of pollen and nectar for colonies raising its winter workers and collecting winter stores.  Rosebay willowherb produces tall stems, up to 1.5 m high.  Bright pink flowers grow horizontally, in a spiral formation on the top part of the stem, while the rest of the stem has 10 cm leaves arranged in a similar spiral arrangement.  Its habitat includes hedgerows, margins of woodland and common.  It is particularly quick to establish in fire damaged areas of woodland or disturbed wasteland.

Flower : Rosebay willowherb flowers between July and September.  Each flower is pink, with 4 petals, 8 stamens and an inferior ovary.

Pollen : The pollen load of rosebay willowherb is dark blue.  The grain is round, although the pores give it a triangular appearance.  It is approximately 75 um across.  There are three pore type apertures.  The surface is smooth and the exine is thin.

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