Crepis vesicaria |
Crepis nicaeënsis |
|
---|---|---|
beak hawk's-beard, weedy hawksbeard |
Turkish hawksbeard |
|
Habit | Annuals, biennials, or perennials, 3–120 cm (taproots slender to thick, caudices swollen). | Annuals or biennials, 25–110 cm (taproots shallow). |
Stems | 1, erect to arcuate or decumbent (green or purple proximally), usually much branched, glabrate to hispid and/or tomentose, sometimes sparsely setose (setae black). |
usually 1, erect, branched from middles or distally, densely hispidulous proximally. |
Leaves | basal and cauline; petiolate (bases clasping); blades oblanceolate to ovate, often runcinate, 10–35 × 2–8 cm, margins pinnately lobed to toothed (terminal lobes relatively large), apices obtuse or acute, faces usually hirsute (hairs sometimes only on veins) or glabrous (cauline sessile, bases auriculate, clasping, margins ± toothed). |
basal and cauline; petiolate (petioles winged, bases clasping); blades oblanceolate, runcinate, 16–19 × 2–4 cm, margins pinnately lobed, dentate, or finely denticulate, apices obtuse, faces finely hispidulous (hairs yellowish). |
Involucres | cylindro-campanulate (becoming turbinate or urceolate in fruit), 5–14 × 5–6 mm. |
campanulate, 8–10 × 4–6 mm. |
Florets | 50–70; corollas yellow (reddish abaxially), 6–15 mm. |
50–60; corollas yellow (sometimes reddish distally), 10–11 mm. |
Phyllaries | 7–16, (reflexed at maturity) lanceolate, 10–12 mm, (margins green to yellowish), apices obtuse or acute (ciliate), abaxial faces tomentose and often stipitate-glandular, adaxial with fine, appressed hairs. |
10–15, lanceolate (strongly tapered), 7–8 mm (bases strongly keeled, partly enclosing marginal cypselae, margins scarious), apices obtuse (ciliate), abaxial faces glabrous or glabrate, adaxial glabrous. |
Calyculi | of 5–12, ovate to linear-lanceolate, glabrous bractlets 3–4 mm (reflexed in fruit, scarious). |
of 7–9, linear, glabrous or glabrate bractlets 3–6 mm. |
Heads | 10–20, in lax, corymbiform arrays. |
2–15, in corymbiform arrays. |
Cypselae | (monomorphic or dimorphic) pale brown or yellowish, fusiform, 4–9 mm, outer wider with apices attenuate (not beaked), inner gradually tapered, beaked (beaks 2–5 mm, ± equal to bodies), ribs 10 (narrow); pappi white (fine, soft), 3–6 mm. |
golden brown, fusiform, 2.5–4 mm, ribs 10 (broad); pappi bright white, 4–5 mm. |
2n | = 8, 16. |
= 8. |
Crepis vesicaria |
Crepis nicaeënsis |
|
Phenology | Flowering Feb–Oct. | Flowering May–Aug. |
Habitat | Sandy clearings, hillsides | Waste places, meadows |
Elevation | 0–300 m (0–1000 ft) | 1400–1600 m (4600–5200 ft) |
Distribution |
CA; CT; NC; NY; OR; PA; BC; Europe [Introduced in North America; introduced, South America]
|
MA; MI; OH; VT; WA; BC; Europe [Introduced in North America] |
Discussion | Native to the Mediterranean region of western Europe, Crepis vesicaria is recognized by its annual or biennial habit, pinnately lobed leaves, reflexed calyculi, tomentose and glandular phyllaries, and slender, long-beaked inner cypselae. It is polymorphic; subspecies are recognized in Europe. E. B. Babcock (1947) identified the North American plants as subsp. taraxaciflora (Thuiller) Thellung, which some Europeans (T. G. Tutin et al. 1964–1980, vol. 4) have listed as a synonym of subsp. haenseleri (Boissier ex de Candolle) P. D. Sell. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Crepis nicaeënsis is distinguished by the annual or biennial habit, shallow root system, hispid stems, and glabrate phyllaries enclosing outer cypselae. It is similar in habit to C. biennis, which differs in its larger heads and 13–20-ribbed cypselae; it is considered closely related to C. capillaris (E. B. Babcock 1947). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 238. | FNA vol. 19, p. 232. |
Parent taxa | Asteraceae > tribe Cichorieae > Crepis | Asteraceae > tribe Cichorieae > Crepis |
Sibling taxa | ||
Name authority | Linnaeus: Sp. Pl. 2: 805. (1753) | Balbis: in C. H. Persoon, Syn. Pl. 2: 376. (1807) |
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