Crepis bursifolia

Linnaeus

Sp. Pl. 2: 805. 1753.

Common names: Italian hawksbit
Introduced
Treatment appears in FNA Volume 19. Treatment on page 227. Mentioned on page 224.

Perennials, 5–35 cm (taproots stout, caudices covered by old leaf-bases). Stems 2–9+, arcuate or decumbent, slender, scapiform, cymosely branched distally, glabrous. Leaves mostly basal; petiolate; blades oblanceolate, lyrate, 2.5–25 × 0.5–6 cm, margins pinnately lobed (lateral lobes lanceolate, dentate, acute, terminal lobes usually larger), apices obtuse or acute, faces glabrous. Heads 2–3 (peduncles slender), in cymiform arrays. Calyculi of 10–14, (lax) linear, tomentose or glandular-pubescent bractlets 2–5 mm. Involucres cylindric, 8–11 × 3–4 mm. Phyllaries 10–12 (reflexed, medially yellowish) lanceolate (bases keeled, margins dark greenish, sometimes scarious), apices acute (ciliate), abaxial faces tomentulose, adaxial with fine hairs. Florets 30–60; corollas light yellow, greenish abaxially, 10–11 mm. Cypselae pale-brown, fusiform, 6–7 mm, beaked, beaks pale (lengths nearly 2 times bodies), ribs 10; pappi white, 3–4 mm. 2n = 8.


Phenology: Flowering Apr–Sep.
Habitat: Waste places, lawns
Elevation: 0–100 m

Distribution

V19-283-distribution-map.gif

Introduced; Calif., Europe

Discussion

Crepis bursifolia is identified by the dense basal rosettes of glabrous, lyrate leaves with dentate lateral lobes and relatively large terminal lobes, relatively few heads on slender peduncles, and cypselae with relatively thin beaks two times lengths of the bodies. It is an aggressive weed.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."fine" is not a number.

... more about "Crepis bursifolia"
with appressed hairs +  and glabrous +
scarious +
ovate +  and lanceolate +
indeterminate +  and determinate +
David J. Bogler +
Linnaeus +
runcinate +, lyrate +, lanceolate +  and linear or spatulate +
decurrent +
compound +  and simple +
2.5 cm25 mm <br />0.025 m <br /> (25 cm250 mm <br />0.25 m <br />) +
lyrate;oblanceolate +
0.5cm;6cm +
tuberculate +, rugose +, muricate +  and smooth +
setose +, tomentulose +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
filiform +
glandular-pubescent +  and tomentose +
lobing +, entire +  and lobed +
Italian hawksbit +
zygomorphic +, actinomorphic +  and (3-)5-merous +
greenish +  and light yellow +
1 cm10 mm <br />0.01 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Calif. +  and Europe +
0–100 m +
winged +  and beaked +
dispersed +
Waste places, lawns +
indeterminate +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
toothed +
dentate +  and entire +
green +  and yellowish +
2-carpellate +
persistent +
connate +  and distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering Apr–Sep. +
connate +  and distinct +
10 +  and 12 +
hairy +  and glabrous +
convex;flat +
spiculate-roughened +
exalbuminous +
Introduced +
erect +  and decumbent +
2 +  and 9 +
scapiform +
slender +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Crepis bursifolia +
species +
taprooted +  and rhizomatous +
5 cm50 mm <br />0.05 m <br /> (35 cm350 mm <br />0.35 m <br />) +
shrub +  and subshrub +
11 +, 6 +, 5 +, 4 +  and 3 +