Arnica lanceolata subsp. prima

(Maguire) Strother & S. J. Wolf

Novon 16: 2006.

Common names: Clasping arnica
Endemic
Basionyms: Arnica amplexifolia subsp. prima Maguire Madroño 6: 154. 1942
Synonyms: Arnica amplexicaulis Nuttall Arnica amplexicaulis var. piperi H. St. John & F. A. Warren Arnica amplexicaulis subsp. prima (Maguire) Maguire Arnica amplexicaulis var. prima (Maguire) B. Boivin
Treatment appears in FNA Volume 21. Treatment on page 373.

Leaves: basal commonly withered by flowering, sessile or subsessile to petiolate, blades usually oblong to narrowly lanceolate or oblanceolate, rarely ovate, margins subentire to prominently dentate-serrate; cauline sessile (bases sometimes partly connate-sheathing), blades narrowly to broadly lance-elliptic or ovate, margins subentire to serrate-dentate, faces sparsely to densely pilose. Phyllaries narrowly lanceolate. 2n = 38, 57, 76.


Phenology: Flowering May–Sep.
Habitat: Moist areas, along stream banks, snow-melt areas, montane to alpine meadows
Elevation: 0–3000 m

Distribution

V21-936-distribution-map.gif

Alta., B.C., N.W.T., Yukon, Alaska, Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

The name Arnica amplexifolia Rydberg (1900c) was a superfluous (illegitimate) substitution for A. amplexicaulis Nuttall (1841).

Selected References

None.

Lower Taxa

None.

76 +, 57 +  and 38 +
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 +
(Maguire) Strother & S. J. Wolf +
decurrent +
Arnica amplexifolia subsp. prima +
subsessile +  and petiolate +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
4 cm40 mm <br />0.04 m <br /> (12 cm120 mm <br />0.12 m <br />) +
ovate;lance-elliptic;subentire;prominently dentate-serrate +
2cm;6cm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
connate +  and distinct +
Clasping arnica +
stipitate-glandular +  and hairy +
stipitate-glandular +  and hirsutulous +
obovoid-cylindric +, fusiform +  and conic +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
0–3000 m +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Moist areas, along stream banks, snow-melt areas, montane to alpine meadows +
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 />) +
narrowly campanulate;turbinate +
petiolate +  and sessile +
4 (?) +  and 8 (?) +
deltate +
subsessile +  and petiolate +
dentate to pinnatifid or palmatifid +  and entire +
subentire +  and serrate-dentate +
2-carpellate +
subplumose +  and barbellate +
persistent +
10 +  and 50 +
aristate +
Flowering May–Sep. +
8 +  and 15 +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
distinct +
4 +  and 20 +
exalbuminous +
branched +  and simple +
solitary +  and densely clumped +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Arnica amplexicaulis +, Arnica amplexicaulis var. piperi +, Arnica amplexicaulis subsp. prima +  and Arnica amplexicaulis var. prima +
Arnica lanceolata subsp. prima +
Arnica lanceolata +
subspecies +
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 />) +