HOGWEED USES
The most significant nectar provider for a whole host of insects at the moment is Hogweed, or Cow Parsnip if you prefer. In common with many species of wildflowers it seems to be having a bumper season and is flowering profusely in a lot of locations. The photographs here were mostly taken in the last couple of weeks, either in the Rhiwledyn Nature Reserve on the Little Orme or on Bryn Euryn.
Hogweed, Cow Parsnip – Heracleum sphondylium
Family: Carrot; Umbelliferae Habitat: Rough grassland verges, light woodland. The most usual late autumn umbellifer in flower.
Flowering: (May) June – September Seeds: Winged Height: averages 50–120 cms (20–47 in), can reach 2 metres (6 ft 7 in)
Hogweed is an herbaceous perennial or sometimes biennial plant, native to Europe and Asia. It is an umbelliferous plant, in the same group as plants such as fennel, cow parsley and ground elder.
ETYMOLOGY
The common name of Hogweed refers to the characteristic pig-like smell of the flowers. The genus name Heracleum derives from the Greek “herákleion” and refers to the mythologic hero Heracles, who is reputed to have used the plant medicinally. The species name sphondylium, meaning “vertebrae”, refers to the shape of the segmented stem.
The leaves are large and can reach 50 cms (20 in) in length. They are pinnate, hairy and serrated, divided into 3-5 lobed segments.
The roots of the plant are large, rhizomatous and reddish in colour. The stem is hollow and striated with bristly hairs.
The flowers are white, sometimes pinkish and each has 5 petals. They are arranged in large umbels of up to 20 cm of diameter with 15 to 30 rays. The peripheral flowers having a radial symmetry.
The hogweed is one of a number of plants that have foregone the use of a sweet scent to attract pollinating insects. The plant has adopted the more unusual strategy of mimicking the scent of pigs, not that noticeable to us, but to flies it is like a magnet and flies are the main pollinators of this plant.
Common hogweed was once employed in medicine, although its use has been long out of favour. Long ago the seeds were boiled in oil that was then recommended for application to running sores and to treat the rash associated with shingles. Culpeper recommended a decoction of the seeds to be applied to running ears.
Hogweed shoots have a high vitamin C content and the plant is still eaten in some places. The young shoots are collected early in the season and the tender young stems, cut into pieces about 15cm long may be boiled in salted water for about 15 minutes, then drained and served with butter. Apparently they make an ideal accompaniment to meat dishes.
HOGWEED AND INSECTS
Although its main pollinators are flies, many insects of other species can be seen helping them out whilst helping themselves to the nectar. It is not uncommon to see numbers of insects vying for a space on the same hogweed flowerhead.
www.tmpooja online shopping.com
Our Other Topics:
No comments:
Post a Comment