familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Chaenactidinae
genusArnica
speciesArnica rydbergii

Arnica rydbergii

Greene

Pittonia 4: 36. 1899.

Steven J. Wolf
Common names: Rydberg’s arnica
Endemic
Treatment appears in FNA Volume 21. Treatment on page 371. Mentioned on page 367.

Plants 8–35 cm. Stems (branches from rhizomes) simple. Leaves 2–4 pairs (basal often persistent on sterile rosettes), mostly cauline; petiolate (at least basal) or sessile; blades oblanceolate to spatulate, 2–7 × 0.5–2.5 cm, margins usually entire, sometimes denticulate, rarely dentate, apices usually acute, sometimes obtuse, faces sparsely puberulent, moderately pubescent distally, stipitate-glandular. Heads 1–3 (–5). Involucres turbinate-campanulate. Phyllaries 9–15, linear-oblong to narrowly lanceolate. Ray-florets 6–10; corollas yellow. Disc-florets: corollas yellow; anthers yellow. Cypselae brown, 4–7 mm, densely hirsute (not stipitate-glandular); pappi white, bristles barbellate. 2n = 38, 76.


Phenology: Flowering Jul–Aug.
Habitat: Dry to mesic, exposed, rocky alpine slopes and ridges or alpine meadows
Elevation: 1200–3400 m

Distribution

V21-929-distribution-map.gif

Alta., B.C., Colo., Idaho, Mont., Oreg., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Arnica rydbergii"
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2n chromosome quantity
76 +  and 38 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther coloration
yellow +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther theca coloration
pale +
Apex fusion
connate +  and distinct +
Apex growth form or texture
herbaceous +
Apex shape
obtuse;acute +
Apex size
subequal +
Apex texture
scarious +
Apical appendage presence
absent +
Apical appendage shape
usually ovate +  and lanceolate +
Appendage pubescence
hirsute +
Appendage relief
papillate +
Appendage shape
usually deltate +  and lanceolate +
Array architecture
corymbiform +  and cymiform +
Array development
indeterminate +  and determinate +
Author
Steven J. Wolf +
Authority
Greene +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Blade architecture
compound +  and simple +
Blade length
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Blade shape
oblanceolate;spatulate +
Blade width
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body relief
tuberculate +  and rugose +
Bractlet quantity
1;15 +
Branch arrangement or course or shape
linear +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellate +
Bristle fusion
connate +  and distinct +
Bristle quantity
6;80 +
Bristle shape
Plumose (?) +
Calyculus presence
absent +
Calyculus quantity
Of 1 (15+ bractlets) +
Common name
Rydberg’s arnica +
Corolla architecture
zygomorphic +
Corolla coloration
yellow +
Corolla pubescence
stipitate-glandular +  and hairy +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
beaked +
Cypsela coloration
brown +
Cypsela growth form
dimorphic +
Cypsela pubescence
hirsute +
Cypsela shape
obovoid-cylindric +, fusiform +  and conic +
Cypsela some measurement
4mm;7mm +
Disc-floret quantity
10 (120) +
Disc-floret reproduction
fertile +  and bisexual +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Alta. +, B.C. +, Colo. +, Idaho +, Mont. +, Oreg. +, Utah +, Wash. +  and Wyo. +
Elevation
1200–3400 m +
Embryo course
straight +
Face pubescence
stipitate-glandular +, pubescent +  and puberulent +
Face relief
scabrellous +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
1;5 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Funnelform shape
campanulate +  and cylindric +
Glomerule arrangement
singly +
Habitat
Dry to mesic, exposed, rocky alpine slopes and ridges or alpine meadows +
Head architecture
discoid +  and radiate +
Head architecture or arrangement
radiate +
Head architecture or shape
discoid +
Head arrangement
in cymiform or corymbiform arrays +  and singly +
Head atypical quantity
3 (5) +
Head development
indeterminate +
Head quantity
1;3 +
Head reproduction
homogamous +  and heterogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Yevonn Wilson-Ramsey +
Individual head architecture
each +  and sessile +
Involucre diameter
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Involucre position relational
surrounding +
Involucre shape
turbinate-campanulate +
Leaf architecture
sessile +  and petiolate +
Leaf arrangement
opposite +
Leaf position
cauline +
Leaf quantity
2 (?) +  and 4 (?) +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe quantity
5 (?) +
Lobe shape
deltate +
Margin architecture or shape
dentate +  and entire +
Margin shape
denticulate +
Nerve atypical quantity
10 (20) +
Nerve quantity
5 (10) +
Number of lower taxa
0 +
Ovary architecture
2-carpellate +
Ovary architecture or structure in adjective form
1-locular +
Ovary position
inferior +
Ovule fixation
attached +
Ovule orientation
anatropous +
Ovule quantity
1 +
Pappus architecture
subplumose +  and barbellate +
Pappus coloration
white +
Pappus duration
persistent +
Pappus fragility
fragile +
Pappus life cycle
falling +
Pappus quantity
10 +  and 50 +
Pappus shape
aristate +
Pappus width
fine +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering Jul–Aug. +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary life cycle
falling +
Phyllary quantity
9 +  and 15 +
Phyllary shape
Linear-oblong (Narrowly lanceolate) +
Phyllary size
unequal +
Phyllary texture
Herbaceous (Chartaceous) +
Publication title
Pittonia +
Publication year
1899 +
Ray-floret architecture
pistillate +
Ray-floret atypical quantity
21 (60) +
Ray-floret presence
absent +
Ray-floret quantity
6 (10) +
Ray-floret reproduction
fertile +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle relief
pitted +  and smooth +
Receptacle shape
convex +
Reference
None +
Root texture
fibrous +
Scale fusion
distinct +
Scale quantity
4 +  and 20 +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (2) +
Series quantity
2 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 929.xml +
Special status
Endemic +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
simple +
Stem orientation
erect +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Synonyms
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Taxon family
Asteraceae +
Taxon name
Arnica rydbergii +
Taxon parent
Arnica +
Taxon rank
species +
Throat shape
campanulate +  and cylindric +
Treelet atypical some measurement
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
Treelet some measurement
1 cm10 mm <br />0.01 m <br /> (80 cm800 mm <br />0.8 m <br />) +
Tube height or length or size
shorter +
Tube length or size
longer +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism atypical some measurement
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
Whole-organism duration
perennial +
Whole-organism some measurement
5 cm50 mm <br />0.05 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Whole organism atypical some measurement
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
Whole organism growth form
plant +
Whole organism some measurement
8cm (35cm) +
X chromosome quantity
19 +