Spear Thistles - Seen All Over The Western Isles
These thistles are one of the three types of thistles to be seen here in The Western Isles. This type is to be seen a little later than the marsh thistles which appear on the scene first. The lilac or magenta flowers of the spear thistle show their faces from June to October. The flower heads are larger than the creeping or marsh thistle flowers, getting up to 4 cms in diameter. The appear thistle is a biennial. The rosettes can survive though sometimes for 4 years before finally flowering
Spear Thistles appear on Waste Land, Coastal Dunes
You see the spear thistles in lots of places , growing wild on wasteland, near the sand dunes or just along the roadsides
Stems
The stems of these lovely flowers are winged and spiny. The plant can reach to 150cm in height.
Insects love the Spear Thistle
The flowers are popular with many pollinating insects, bees, butterflies particularly like the rich nectar.
Fertilisation
After fertilsation the seeds mature and the petals will lose their colour, the flower head dries and splits open to release the pappus where the seeds are at the centre. The dried stems can remain for quite some time, maybe a few years if they aren't disturbed, releasing the seeds gradually over time.
Seeds per Flowehead
The average number of seeds per flwerhead is around 100, however there can be up to 300
Spear Thistles - Weeds
It seems almost a shame that these beautiful wildflowers are classed in the Uk as a weed as the flowerheads really are a spectacular sight.
No Natural Enemies because of the prickles
The thistle has no natural enemies because of the vicious spines that cover and protect it like a porcupine.
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