Arnica acaulis

(Walter) Britton

Prelim. Cat., 30. 1888.

Common names: Common leopardbane
Endemic
Basionym: Doronicum acaule Walter Fl. Carol., 205. 1788
Treatment appears in FNA Volume 21. Treatment on page 368. Mentioned on page 367.

Plants 20–80 cm. Stems simple. Leaves 2–4 (–6) pairs, nearly all basal; sessile; blades (with 3, 5, or 7 prominent, subparallel veins) broadly elliptic, ovate, or rhombic, 4–15 × 1.5–8 cm, margins mostly entire, apices mostly obtuse, faces hirsute and stipitate-glandular (cauline leaves 0 or 1–2, distalmost often alternate, much reduced). Heads 3–20. Involucres campanulate. Phyllaries 12–18, narrowly ovate. Ray-florets 10–16; corollas yellow. Disc-florets: corollas yellow; anthers yellow. Cypselae dark gray to dark-brown, 5–7 mm, glabrous or sparsely stipitate-glandular; pappi white, bristles barbellate. 2n = 38.


Phenology: Flowering Apr–Jun.
Habitat: Sandy pine woods and clearings, often in damp soils, chiefly on Coastal Plain
Elevation: 0–300 m

Distribution

V21-916-distribution-map.gif

Del., D.C., Fla., Ga., Md., N.J., N.C., Pa., S.C., Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Arnica acaulis"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and cymiform +
indeterminate +  and determinate +
Steven J. Wolf +
(Walter) Britton +
decurrent +
Doronicum acaule +
compound +  and simple +
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
rhombic;ovate;rhombic;ovate;elliptic +
1.5cm;8cm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
connate +  and distinct +
Common leopardbane +
stipitate-glandular +  and hairy +
dark gray +  and dark-brown +
stipitate-glandular +  and glabrous +
obovoid-cylindric +, fusiform +  and conic +
fertile +  and bisexual +
fertile +  and bisexual +
Del. +, D.C. +, Fla. +, Ga. +, Md. +, N.J. +, N.C. +, Pa. +, S.C. +  and Va. +
0–300 m +
stipitate-glandular +  and hirsute +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Sandy pine woods and clearings, often in damp soils, chiefly on Coastal Plain +
discoid +  and radiate +
in cymiform or corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
campanulate +
cauline +  and basal +
2 (?) +  and 4 (?) +
deltate +
toothed +  and entire +
2-carpellate +
subplumose +  and barbellate +
persistent +
10 +  and 50 +
aristate +
Flowering Apr–Jun. +
12 +  and 18 +
Prelim. Cat., +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
distinct +
4 +  and 20 +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Arnica acaulis +
species +
campanulate +  and cylindric +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
1 cm10 mm <br />0.01 m <br /> (80 cm800 mm <br />0.8 m <br />) +
toothed +  and entire +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
5 cm50 mm <br />0.05 m <br /> (100 cm1,000 mm <br />1 m <br />) +