familyAsteraceae
tribeAsteraceae tribe Cardueae
genusCirsium
speciesCirsium eatonii
varietyCirsium eatonii var. viperinum

Cirsium eatonii var. viperinum

D. J. Keil

Sida 21: 212. 2004.

David J. Keil
Common names: Snake Range thistle
Treatment appears in FNA Volume 19. Treatment on page 151. Mentioned on page 135.
Revision as of 18:58, 29 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Stems erect or ascending, 25–40 cm. Leaf faces glabrous or nearly so. Heads 1–5, subsessile or short-pedunculate, in erect, racemiform or corymbiform arrays. Involucres 3–5 cm, thinly arachnoid with non-septate trichomes, individual phyllaries evident. Phyllaries green or purplish-tinged; outer with numerous lateral spines; apical spines stout. Corollas lavender to purple, 29–35 mm, tubes 9–12.5 mm, throats 9–12 mm, lobes 9–11 mm. Pappi 20–25 mm.


Phenology: Flowering summer (Jul–Sep).
Habitat: Rocky subalpine slopes, open bristlecone pine forests
Elevation: 3300–3500 m

Distribution

V19-143-distribution-map.gif

Nev.

Discussion

Variety viperinum is apparently endemic to upper elevations of the Snake Range of White Pine County, Nevada. Heads of var. viperinum are similar in size to those of var. clokeyi. These taxa can be distinguished readily by the features in the key. Ranges of the two varieties are separated by about 340 km. Hybridization with Cirsium inamoenum is suspected based upon apparently intermediate specimens.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Cirsium eatonii var. viperinum"
RDF feed
Abaxial face pubescence
villous +  and glabrous +
Adaxial face pubescence
villous +, glabrous +  and arachnoid-tomentose +
Anther base shape
short-tailed +
Anther dehiscence
introrse +
Anther fusion
connate +
Apex architecture
spineless +  and twisted +
Apex architecture or shape
dentate +, entire +  and spine-tipped +
Apex orientation
usually stiffly ascending +  and spreading +
Apex position
innermost +
Apex prominence or shape
flat +
Apex shape
tapering;linear-acicular +
Apex texture
scarious +
Apical appendage shape
linear-oblong +
Apical collar coloration
stramineous +
Apical collar variability
not differentiated +
Apical spine fragility or size
stout +
Appendage pubescence
hirsute +
Appendage quantity
0 +
Appendage relief
papillate +
Array architecture
corymbiform +  and racemiform +
Array development
indeterminate +  and determinate +
Array orientation
erect +
Attachment scar shape
angled +
Author
David J. Keil +
Authority
D. J. Keil +
Band architecture
continuous +
Band quantity
1 +
Basal leaf architecture
sessile +, winged-petiolate +  and spiny +
Basal leaf presence
absent +
Base fixation or orientation
short-appressed +
Base shape
decurrent +
Basionyms
Cnicus eatonii +
Blade architecture
compound +  and simple +
Blade length
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Blade shape
oblong +
Blade width
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Body architecture or pubescence or relief
smooth +
Body relief
10-nerved or 20-nerved +  and rugose +
Bract architecture
spiny-fringed +
Branch orientation
ascending +
Branch pubescence
hairy +
Bristle architecture
barbellate +
Bristle coloration
tawny +  and white +
Bristle quantity
many +
Bristle relief
coarse +
Bristle shape
Plumose (?) +  and Flattened (?) +
Calyculus presence
absent +
Caudex architecture
taprooted +
Common name
Snake Range thistle +
Corolla architecture
actinomorphic +
Corolla arrangement
bilateral +
Corolla coloration
lavender +  and purple +
Corolla some measurement
2.9 cm29 mm <br />0.029 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Cypsela architecture
monomorphic +
Cypsela architecture or pubescence or relief
smooth +
Cypsela architecture or shape
not ribbed +
Cypsela coloration
dark-brown +
Cypsela pubescence
glabrous +
Cypsela shape
compressed +  and ovoid +
Cypsela some measurement
5.5mm;7mm +
Disc-floret reproduction
fertile +  and bisexual +
Distal leaf size
reduced +
Distal stem quantity
0;many +
Distribution
Nev. +
Elevation
3300–3500 m +
Embryo course
straight +
Face architecture
eglandular +
Face coloration
green +
Face pubescence
gray-canescent +  and glabrous +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
25;200 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Habitat
Rocky subalpine slopes, open bristlecone pine forests +
Head architecture
short-pedunculate +  and subsessile +
Head architecture or shape
discoid +
Head arrangement
crowded +
Head development
indeterminate +
Head orientation
nodding +  and erect +
Head position or structure subtype
terminal +
Head quantity
1;5 +
Head reproduction
homogamous +
Illustration copyright
Flora of North America Association +
Illustrator
John Myers +
Individual head architecture
each +  and sessile +
Individual phyllary prominence
evident +
Involucre coloration
suffused with dark purple +  and green +
Involucre length
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Involucre position relational
surrounding +
Involucre pubescence
arachnoid +
Involucre shape
broadly ovoid;campanulate +
Involucre some measurement
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Involucre width
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Lateral spine quantity
Numerous (?) +
Leaf architecture
sessile +  and petiolate +
Leaf architecture or shape
bristly-dentate +
Leaf arrangement
alternate +
Leaf face pubescence
nearly +  and glabrous +
Leaf position
cauline +  and basal +
Lobe architecture
bristle-tipped +
Lobe arrangement or course or shape
linear +
Lobe quantity
5 (?) +
Lobe shape
deltate +, usually narrowly triangular +  and more or less linear +
Lobe some measurement
? (?) +
Main spine some measurement
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Margin architecture or shape
spiny-dentate +
Margin arrangement
overlapping +
Margin shape
3-lobed +, lance-oblong +  and broadly triangular +
Margin texture
scarious +
Number of lower taxa
0 +
Outer phyllary architecture or shape
entire +  and spiny +
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 +
Pair arrangement
spaced +
Pair quantity
10 (20) +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus some measurement
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Peduncle some measurement
0 cm0 mm <br />0 m <br /> (14 cm140 mm <br />0.14 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering summer (Jul–Sep). +
Phyllary apex course
straight +
Phyllary apex shape
spine-tipped +  and plane +
Phyllary coloration
Purplish-tinged (Green) +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary growth form or texture
herbaceous +
Phyllary position
middle +  and outer +
Phyllary quantity
many +
Phyllary size
subequal +
Point fusion
connate +
Point relief
papillate +  and smooth +
Point structure in adjective form
stigmatic +
Principal cauline leaf architecture
sessile +  and winged-petiolate +
Principal cauline leaf arrangement
distributed +
Principal cauline leaf quantity
many +
Principal cauline leaf size
reduced +
Publication title
Sida +
Publication year
2004 +
Ray-floret presence
absent +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle shape
flat;convex +
Reference
None +
Ridge coating
glutinous +
Ridge size or width
narrow +
Root texture
fibrous +
Scale coloration
tawny;white +
Scale shape
setiform +  and plumose +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (3) +
Series quantity
4;5 +
Series size
subequal +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V19 143.xml +
Special status
Illustrated +  and Endemic +
Spine some measurement
0.7 cm7 mm <br />0.007 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +, simple +  and sparingly branched +
Stem orientation
ascending +  and erect +
Stem pubescence
glabrate +, glabrous +  and villous or tomentose +
Stem quantity
1 +  and several +
Stem some measurement
25 cm250 mm <br />0.25 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style quantity
1 +
Style relief
ringed +
Style shape
dilated +  and swollen +
Style size
enlarged +
Style tip shape
elongate +
Style tip some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Synonyms
Compositae +
Taxon family
Asteraceae +
Taxon name
Cirsium eatonii var. viperinum +
Taxon parent
Cirsium eatonii +
Taxon rank
variety +
Throat height or length or size
short +
Throat shape
cylindric +
Throat size
expanded +
Throat some measurement
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Tooth architecture or shape
dentate +
Tooth shape or architecture
bristly-dentate to coarsely +
Trichome architecture
non-septate +
Trichome pubescence
arachnoid-tomentose +
Trichome size
finer +
Tube length or size
long +
Tube shape
bent +
Tube size
slender +
Tube some measurement
0.9 cm9 mm <br />0.009 m <br /> (1.25 cm12.5 mm <br />0.0125 m <br />) +
Volume
Volume 19 +
Whole-organism architecture or shape
spiny +
Whole-organism duration
perennial +
Whole-organism some measurement
10 cm100 mm <br />0.1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
Whole organism growth form
tree +, vine +, shrub +  and subshrub +
X chromosome quantity
17 +