This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
Unlike the Mouse-ear Hawkweed this has a tall stem. The leaves are green or bluish-green, and oblong, the radical leaves stalked, in a rosette, toothed in the middle or lower half, the stem-leaves stalk-less. The leaves are often spotted.
The flowers are yellow, as in all Hawkweeds, and arranged in a corymb, or panicled, with ascending flower-stalks, with few hairs. The phyllaries or scalesare equally narrowed, and the involucre or whorl of bracts cylindrical and subacute. The styles are livid.
The stem varies in height from 18 in. to 2 ft. Flowers are to be sought between June and September. This plant is perennial, and can be propagated by division.
The flowers are rather larger than in Hieracium Pilosella, and the flower-stalks are not prostrate, but the flowerheads borne on erect and longer scapes. They usually occur in shaded districts, so that the visitors to the flowers are different. They are Bombus, B. terrestris, B. silvarum, Andrena, A. denticulata, Halictus cylindricus, Panurgus, Lepidop-tera, Rhopalocera, Lycoena.
The achenes are provided with a pappus of simple hairs, and dispersed by the wind when the seeds are ripe.
Two fungi, Puccinia hieracii, Entyloma calenduloe, attack the leaves.
The second Latin name refers to its wide distribution, but the name refers to an aggregate which has since been split up.
Photo. Horwood - Common Hawkweed (Hieracium vulgatum, Fr.)
Essential Specific Characters: 180. Hieracium vulgatum, Fr. - Stem erect, tall, leaves oblong-lanceolate, radical leaves alternate, with forward teeth, purplish below, flower-heads large, yellow, in a panicle or corymb, peduncles straight, phyllaries attenuate.