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Hieracium murorum

Hieracium murorum L.

 

Wall Hawkweed

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassAsteridaeA large class that encompasses asters
OrderAsteralesFlowering plants with a central disk flower and surrounding petals, like daisies
FamilyAsteraceaeThe aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
GenusHieraciumFrom Greek hierakion, “a hawk,” from Pliny’s belief that hawks strengthened their eyesight by eating these plants
Speciesmurorum“Of walls”

About plant names...

Wall hawkweed is a European native that has found its way to North America prior to 1900. The rather curious name comes from its affinity for rocky slopes and walls.

Identification: Plants are 10-24" (25-60 cm) in height, with hairy stems. Only 3-6 leaves appear at the base of the plant, sometimes with two or three more on the stems. Leaves are elliptic, 1¾-4" (5-11 cm) × ⅞-1¾" (2.5-4.5 cm), sometimes mottled with purple. Leaves are unusual in shape, wide at the base, with large, forward-pointing teeth that fall somewhere between the designation of “tooth” vs. “lobe.” Flower heads appear as 5-8 corymbs. Flowers are yellow, with 30-50 or more florets, about ½" (1.3 cm) in size. They flower in June.

This hawkweed comparison table is an aid to identifying hawkweeds and similar-appearing species.

Online References:

Hieracium murorum at the University of Wisconsin's Robert W. Freckmann Herbarium

Hieracium murorum at Skye Flora

Hieracium murorum on eFloras

References:

Hains, Arthur; Farnsworth, Elizabeth & Morrison, Gordon (illus.), Flora Novae Angliae: a Manual for the Identification of Native and Naturalizaed Higher Vascular Plants of New England, Yale University Press, 2011, p. 412

Hieracium murorum (Wall Hawkweed)

9/29/2013 · Compass Harbor, Acadia National Park, Bar Harbor, ME
≈ 8 × 5" (19 × 12 cm) ID is uncertain

Hieracium murorum (Wall Hawkweed)

6/16/2012 · Brown St., Falmouth, ME
≈ 7 × 4½" (17 × 11 cm)

Hieracium murorum description by Thomas H. Kent, last updated 5 Oct 2016.

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Hieracium murorum (Wall Hawkweed)

6/16/2012 · Brown St., Falmouth, ME
≈ 4 × 4" (10 × 11 cm)

Hieracium murorum (Wall Hawkweed)

6/16/2012 · Brown St., Falmouth, ME
≈ 9 × 6" (23 × 15 cm)

Hieracium murorum (Wall Hawkweed)

6/16/2012 · Brown St., Falmouth, ME
≈ 11 × 7" (27 × 18 cm)

Hieracium murorum (Wall Hawkweed)

9/29/2013 · Compass Harbor, Acadia National Park, Bar Harbor, ME
≈ 6 × 4" (16 × 10 cm) ID is uncertain

Range:

About this map...