Family: Asteraceae
hawk's-beard, narrow-leaved hawk's-beard
Josh Sulman
Josh Sulman
University of Wisconsin - Madison (WIS-VP)
Etymology: tectorum = (Latin) a covered structure, roofed enclosure, shelter, roof Plants: erect, annual, 8"-40" tall forb with milky juice; taprooted
Leaves: alternate, getting smaller toward the top; basal leaves stalked, lance-like with a pointed tip, toothed to pinnately-divided; stem leaves stalkless, mostly linear
Flowers: head 1" wide with yellow ray flowers; inflorescence of several heads branched along the stem; blooms June-Oct.
Fruits: dry, dark purple/brown seed with 10 ribs on a whitish, fluffy pappus
Habitat: disturbed sites; in sandy soil
Conservation Status: Introduced - naturalized
Leaves: alternate, getting smaller toward the top; basal leaves stalked, lance-like with a pointed tip, toothed to pinnately-divided; stem leaves stalkless, mostly linear
Flowers: head 1" wide with yellow ray flowers; inflorescence of several heads branched along the stem; blooms June-Oct.
Fruits: dry, dark purple/brown seed with 10 ribs on a whitish, fluffy pappus
Habitat: disturbed sites; in sandy soil
Conservation Status: Introduced - naturalized
Annual or biennial 2-5 (-9) dm tall, branching above. Lower stem glabrous, pilose to hispid-tomentose on peduncles. Basal and lower cauline leaves 6-16 cm long, 1-3 cm wide, short-petioled, pinnatifid or dentate to entire, sparsely pilose on upper surface. Upper cauline leaves sessile, linear. Corymbs open, much-branched, with several to many (-80) small heads, these when in flower ca. 25-30 mm in diam. ; outermost bracts very short, the inner in a single series, 5.5-8.8 mm high, glandular-pubescent and minutely arachnoid on outer surface, with minute (20x) silky appressed hairs on the.inner. Achenes narrowed toward summit, but not beaked, scabrous on the ribs. Pappus of numerous glistening white bristles. 2n-8 (Babcock 1947).
Native of Eurasia, locally abundant in NW. Wisconsin (esp. in area of "Glacial Lake Barrens") on roadsides, in sand or gravel in Jack Pine woods, lake shores, river banks, cultivated or abandoned fields, low pastures, bogs, dumps and deer yards. Flowering from early June through early October; fruiting from mid-June to mid-October.
Crepis tectorum can be confused with species of Hieracium, especially H. fiorentinum, but has many cauline leaves, the lower lobed to dentate, while H. fiorentinum has all leaves entire and usually only 2 or 3 on the scape.
Johnson, M.E. and H.H. Iltis. 1963. Preliminary reports on the flora of Wisconsin: No. 48. Compositae Family. Wisconsin Academy of Sciences, Arts & Letters. 52:255-342.
Other Treatments:
Josh Sulman
Josh Sulman
Richard Bauer
Josh Sulman
Derek Anderson
Robert W. Freckmann
Christopher Noll
Christopher Noll
Kurt Stüber
