Arctium tomentosum

Felt Burdock ( Arctium tomentosum )

The Felt burdock or Woolly Burdock ( Arctium tomentosum ) is a plant of the genus burdock ( Arctium ) in the subfamily Carduoideae within the sunflower family ( Asteraceae).

• 3.1 Notes and references

Description

Appearance and foliage leaf

When Felt Burdock is a biennial herbaceous plant that plant height usually 50 to 120, sometimes reaches up to 250 cm. The stem is usually branched sparrig.

The alternate arranged leaves are always divided into petiole and leaf blade, which is densely gray-tomentose on the underside more or less. The basal leaves have hollow or solid, 10 to 15 cm long petioles with glandular hairs and on the bottom white woolly haired and green on the top and sparse short gehaarte leaf blades that and a length of 30 to 40 cm and a width of 16 up to 28 cm a coarse- toothed own up almost smooth leaf edge.

Inflorescence, flower and fruit

In schirmtraubigen total inflorescences stand together the basket- shaped partial inflorescences over at a length of 1.5 to 12 cm relatively long Blütenstandsschäften. The Felt burdock can be distinguished from the other types of barnacles immediately by the spinnwebartig woolly hairy flower heads. The flower heads have a diameter of 1.5 to 2.5 cm and a height of 3 cm. The bracts are linear to linear- lanceolate; the inner are usually purple and have an edge with tiny, outstretched or bent-back glandular hairs. The reddish or whitish tip of the bracts can hook-shaped bent or straight.

In the flower baskets are many ( over 30) tubular flowers available. The mostly pink - purple, rarely white flowers crowns are 9 to 13 mm long with a tiny glandular tongue.

The light brown achenes are 5-8 mm long. The pappus consists of 1 to 3 mm long bristles.

Chromosome number

The chromosome number is 2n = 36

Occurrence

The felt - Burdock is found in Europe and western Asia. You can not grow to be dry waste places such as roadsides, debris or field margins, like near shores.