Hieracium scabrum Michaux

Remark The words or terms in red (actually dark orange) in the text are defined in a glossary.

aug_15_06c.gthmb can't be loaded. Hieracium scabrum is a perennial herb native to North America. Some botanist recognise three varieties of the North American species: for others these varieties are mere synonyms.

The plant belongs to the Asteraceae family.


The genus name is said to come form the Greek ιεραξ, the falcon, since the Roman naturalist Gaius Plinius Secundas (Pliny the Elder, AD 23 - August 24, AD 79) believed that the feathery Accipiters (a group of birds of prey in the family Accipitridae, the hawks family notably) fed on plants of this genus to strengthen their eyesight and thus, Hieracium, as named by Pliny the Elder in his Naturalis Historia (34, 114) became the genus name, and by extension the Greek and Latin name of many species of the Hieracium genus, many of these species with the Hawkweed vernacular name.

In Latin, the adjective scaber of neutral scabrum means rough, the epithet referring to the somewhat rough leaves.

Common names

The vernacular name of Hieracium scabrum is Rough Hawkweed, the Rough translating the species epithet and the genus name referring to the fable of Pliny the Elder. The French vernacular is Épervière scabre.


Hieracium scabrum has also been known as: draw.jpg can't be loaded.


Plants of the Hieracium scabrum species are between 30 and 60 cm tall. They usually do not have basal leaves.



Flower heads


Hieracium scabrum is found in dry woods, clearings, in disturbed sites, and in sandy soil.


map_na.jpg can't be loaded. Hieracium scabrum is found in eastern Canada, from New Brunswick to Ontario. It is also found in the eastern USA. The map shows the Canadian provinces and USA states where the plant can be found.


The Rappahannock used an infusion of the leaves of Hieracium scabrum or chewed them for diarrhea. The plant has also been employed for the relief of toothache.


The photos of the gallery were taken either with one of the following: Minolta DiMAGE 7, Canon PowerShot A530, Canon Xt Rebel, usually with the EF-S60mm f/2.8 Macro USM objective, Fujifilm A 610 and EPSON Perfection 1650 (scanner). The title in the window shows the date when the picture was taken, i.e. jan_30_06... would mean that the photo was taken on the 30th of January, the 06 is for the 6th picture taken that day. The month, day and picture number might be followed by a letter which I use to identify the system used to take the picture.

Click on the thumbnails to get larger view. The original photos are usually in TIFF format, the photos shown are generally in JPEG format, often of dimensions one half (surface one quarter) for loading time reduction.


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aug_15_01s.mthmb cannot be loaded. The leaves were scanned at 300 dpi, and the dimensions of the resulting picture divided by 2 (area divided by 4); this allows to measure the dimensions of the leaves.

Flower heads

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