Hieracium lactucella

Wallroth

Sched. Crit., 408. 1822.

Treatment appears in FNA Volume 19. Treatment on page 284. Mentioned on page 280.

Plants 9–20 (–35+) cm. Stems proximally piloso-hirsute (hairs 1–2+ mm), sometimes stipitate-glandular as well, distally stellate-pubescent and stipitate-glandular (not piloso-hirsute). Leaves: basal 5–8+, cauline 0 (–2+); blades spatulate to oblanceolate, 15–40 × 5–12 mm, lengths 3–6+ times widths, bases cuneate, margins entire, apices rounded to acute, abaxial faces glabrous or piloso-hirsute (hairs 1–3+ mm), adaxial glabrous or piloso-hispid (hairs 1–3+ mm), sometimes stellate-pubescent as well. Heads usually 2–5+ in ± umbelliform arrays, sometimes borne singly. Peduncles stellate-pubescent and stipitate-glandular (not piloso-hirsute). Calyculi: bractlets 9–13+. Involucres hemispheric, 6–8 mm. Phyllaries 16–21+, apices acuminate, abaxial faces stellate-pubescent and stipitate-glandular, sometimes piloso-hirsute (hairs 0.8–1.5+) as well. Florets 40–60+; corollas yellow, 8+ mm. Cypselae columnar, 1–2.5 mm; pappi of 25–40, white bristles in 1 series, 4–5 mm.


Phenology: Flowering May–Jul.
Habitat: Pastures, fields
Elevation: 10+ m

Distribution

V19-391-distribution-map.gif

Introduced; N.S., N.Y., Europe

Discussion

According to A. E. Roland and M. Zinck (1998), Hieracium auricula Linnaeus and Pilosella auricula (Linnaeus) Schultz-Bipontinus have been misapplied to plants here called H. lactucella (see also discussion at 5. H. caespitosum).

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Hieracium lactucella"
piloso-hirsute +, stipitate-glandular +, stellate-pubescent +  and glabrous +
stellate-pubescent +, piloso-hispid +  and glabrous +
scarious +
ovate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
Wallroth +
cuneate +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
spatulate;oblanceolate +
5mm;12mm +
tuberculate +, rugose +, muricate +  and smooth +
deltate;lanceolate or linear +
filiform +
zygomorphic +, actinomorphic +  and (3-)5-merous +
black +  and redbrown +
N.S. +, N.Y. +  and Europe +
winged +  and beaked +
dispersed +
Pastures, fields +
indeterminate +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
hemispheric +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
dentate +, denticulate +  and entire +
2-carpellate +
persistent +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
stipitate-glandular +  and stellate-pubescent +
not inflated +
Flowering May–Jul. +
connate +  and distinct +
16 +  and 21 +
subequal +  and unequal +
Sched. Crit., +
flat;convex +
exalbuminous +
scapiform +
appendaged +  and truncate +
papillate +
Pilosella +
Hieracium lactucella +
Hieracium +
species +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
20 cm200 mm <br />0.2 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +