Hieracium megacephalon

Nash

Bull. Torrey Bot. Club 22: 152. 1895.

Synonyms: Hieracium argyraeum Small
Treatment appears in FNA Volume 19. Treatment on page 286. Mentioned on page 280.
Revision as of 19:15, 29 July 2020 by imported>Volume Importer
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Plants ca. 40 cm. Stems proximally piloso-hirsute (hairs 1–4+ mm) and stellate-pubescent, distally piloso-hirsute and/or stellate-pubescent. Leaves: basal 4–6, cauline (1–) 3–4+; blades elliptic to obovate, 35–80 (–120) × 15–30 (–40+) mm, lengths 2–4+ times widths, bases cuneate to rounded (sometimes ± clasping), margins entire or denticulate, apices rounded to obtuse, abaxial faces piloso-hirsute (hairs 1.5–4 mm), sometimes stellate-pubescent as well, adaxial piloso-hirsute. Heads (12–) 20–50+ in open, corymbiform arrays (lengths of arrays ± 2 times diams.). Peduncles stellate-pubescent and stipitate-glandular. Calyculi: bractlets 5–12+. Involucres campanulate, 8–11 mm. Phyllaries 9–13+, apices acute to acuminate, abaxial faces stellate-pubescent and stipitate-glandular. Florets 20–50+; corollas yellow, 10–12+ mm. Cypselae urceolate, 3.5–4+ mm; pappi of 32–40+, white to stramineous bristles in 1–2+ series, 5–6.5 mm.


Phenology: Flowering (Jan–)Apr–May(–Oct).
Habitat: Limestone hammocks, pine woods, sands
Elevation: 0–10+ m

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Hieracium megacephalon"
stipitate-glandular +, stellate-pubescent +  and piloso-hirsute +
acute;acuminate +
scarious +
ovate +  and lanceolate +
corymbiform +  and open +
indeterminate +  and determinate +
John L. Strother +
cuneate +  and rounded +
compound +  and simple +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (8 cm80 mm <br />0.08 m <br />) +
elliptic;obovate +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
deltate;lanceolate or linear +
filiform +
white +  and stramineous +
3 (?) +  and 4 (?) +
zygomorphic +, actinomorphic +  and (3-)5-merous +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
black +  and redbrown +
urceolate +
Fla. +, Ga. +  and S.C. +
0–10+ m +
winged +  and beaked +
dispersed +
Limestone hammocks, pine woods, sands +
in corymbiform , paniculiform , thyrsiform , umbelliform or nearly racemiform , arrays +  and singly +
indeterminate +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
campanulate +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
denticulate +  and entire +
2-carpellate +
persistent +
0.5 cm5 mm <br />0.005 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
stipitate-glandular +  and stellate-pubescent +
not inflated +
Flowering (Jan–)Apr–May(–Oct). +
connate +  and distinct +
9 +  and 13 +
subequal +  and unequal +
Bull. Torrey Bot. Club +
flat;convex +
exalbuminous +
stellate-pubescent +  and piloso-hirsute +
scapiform +
appendaged +  and truncate +
papillate +
Hieracium argyraeum +
Hieracium megacephalon +
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 />) +