familyAsteraceae
tribeAsteraceae tribe Astereae
genusErigeron
speciesErigeron poliospermus
varietyErigeron poliospermus var. cereus

Erigeron poliospermus var. cereus

Cronquist

Brittonia 6: 194. 1947.

Guy L. Nesom
Endemic
Treatment appears in FNA Volume 20. Treatment on page 286. Mentioned on page 285.

Stems branched at or proximal to midstem, glabrous or sparsely hirsute, densely minutely glandular; branches and basal leaves originating on elongate internodes from proximal 1–6 cm of primary-stems. Heads 1–3. Involucres glabrous or sparsely hirsute, densely minutely glandular. Ray-florets 15–45.


Phenology: Flowering Apr–Jul.
Habitat: Shallow rocky soil, sagebrush plains
Elevation: 200–600 m

Distribution

V20-592-distribution-map.gif

Wash.

Discussion

Variety cereus grows in Chelan, Douglas, Grant, and Kittitas counties, apparently occurring as an enclave within the range of the typical variety. The vestiture and elongate proximal internodes of var. cereus are distinctive even within the group of species most closely related to Erigeron poliospermus; intergrades with typical E. poliospermus in vestiture and habit appear to be relatively common. Analogous variants occur within E. concinnus and are recognized at varietal rank.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

... more about "Erigeron poliospermus var. cereus"
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Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Apex fusion
distinct +
Apex growth form or texture
herbaceous +
Apex size
subequal +
Apex texture
scarious +
Apical appendage quantity
0 +
Apical appendage shape
usually triangular +  and linear +
Appendage pubescence
hirsute +
Appendage relief
papillate +
Appendage shape
usually deltate +  and lanceolate +
Array architecture
paniculiform +, corymbiform +  and loose +
Array development
indeterminate +  and determinate +
Author
Guy L. Nesom +
Authority
Cronquist +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Blade architecture
1-nerved +
Blade atypical length
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Blade atypical width
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Blade length
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Blade shape
narrowly oblanceolate;spatulate +
Blade width
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Body architecture or pubescence or relief
smooth +
Body architecture or shape
ribbed +
Body relief
rugulose +  and muricate +
Branch arrangement or course or shape
linear +
Branch height or length or size
short +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellate +
Bristle pappus duration
persistent +
Bristle quantity
20;30 +
Calyculus presence
absent +
Caudex architecture
with relatively short and thick branches +  and simple +
Corolla architecture
not 2-lipped +  and actinomorphic +
Corolla coloration
white +, usually pink +  and bluish purple +
Corolla presence
absent +
Corolla some measurement
0.5 cm5 mm <br />0.005 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Cypsela architecture
2-nerved +
Cypsela architecture or shape
beaked +, 2-ribbed +  and 5-ribbed +
Cypsela growth form
dimorphic +
Cypsela shape
subterete +, oblong +  and oblong-obovoid compressed +
Cypsela some measurement
2.5mm;3mm +
Disc-floret quantity
25 (450) +
Disc-floret reproduction
fertile +  and bisexual +
Disc corolla atypical some measurement
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Disc corolla some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Disc cypsela presence
absent +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Wash. +
Elevation
200–600 m +
Embryo course
straight +
Face architecture
eglandular +
Face architecture or function or pubescence
glandular +
Face pubescence
strigoso-sericeous +  and hirsute +
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 +
Habitat
Shallow rocky soil, sagebrush plains +
Head architecture or arrangement
radiate +
Head architecture or shape
disciform +  and discoid +
Head arrangement
in loose , corymbiform or paniculiform arrays +  and singly +
Head atypical quantity
1 (3) +
Head development
indeterminate +
Head quantity
1;3 +
Head reproduction
heterogamous +  and homogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Linny Heagy +
Individual head architecture
each +  and sessile +
Internode shape
elongate +
Involucre architecture or function or pubescence
glandular +
Involucre diameter
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Involucre length
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Involucre position relational
surrounding +
Involucre pubescence
hirsute +  and glabrous +
Involucre shape
turbinate;hemispheric +
Involucre width
0.9 cm9 mm <br />0.009 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Lamina shape
coiling +
Leaf architecture
petiolate +  and sessile +
Leaf arrangement
alternate +
Leaf position
basal +
Line quantity
2 +
Lobe atypical quantity
4 (5) +
Lobe orientation
erect;spreading +
Lobe quantity
5 (?) +
Lobe shape
deltate +
Margin architecture or pubescence or shape
ciliate +
Margin architecture or shape
entire +
Margin texture
not +  and scarious +
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 +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret architecture
pistillate +
Peripheral floret presence
absent +
Peripheral floret quantity
50 (200) +
Petal fusion
connate +
Phenology
Flowering Apr–Jul. +
Phyllarie architecture
3-nerved +  and 1-nerved +
Phyllarie architecture or function or pubescence
glandular +
Phyllarie atypical quantity
125 (150) +
Phyllarie duration
persistent +
Phyllarie fusion
distinct +
Phyllarie life cycle
falling +
Phyllarie pubescence
hirsuto-villous +  and hirsute +
Phyllarie quantity
30 (125) +
Phyllarie shape
narrowly elliptic +  and linear-lanceolate +
Phyllarie size
unequal +
Phyllarie texture
Herbaceous (Chartaceous or scarious) +
Phyllarie variability
equal +
Proximal leaf some measurement
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Publication title
Brittonia +
Publication year
1947 +
Ray-floret architecture
pistillate +
Ray-floret presence
absent +
Ray-floret quantity
15 (45) +
Ray-floret reproduction
fertile +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle relief
pitted +
Receptacle shape
flat;conic +
Reference
None +
Root texture
fibrous +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (2) +
Series quantity
2;3 +
Seta pappus atypical quantity
40 (50) +
Seta pappus coloration
stramineous +
Seta pappus duration
persistent +
Seta pappus fusion
connate +
Seta pappus life cycle
falling +
Seta pappus quantity
5 (40) +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20 592.xml +
Special status
Endemic +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +
Stem architecture or function or pubescence
glandular +
Stem growth form or orientation
prostrate +  and decumbent +
Stem orientation
erect +
Stem pubescence
hirsute +  and glabrous +
Style-branch appendage shape
deltate +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
glabrous +
Style quantity
1 +
Style relief
papillate +  and smooth +
Synonyms
Achaetogeron +  and Trimorpha +
Taxon family
Asteraceae +
Taxon name
Erigeron poliospermus var. cereus +
Taxon parent
Erigeron poliospermus +
Taxon rank
variety +
Throat shape
inflated +  and tubular +
Throat texture
indurate +
Tube height or length or size
shorter +
Volume
Volume 20 +
Whole-organism architecture
taprooted +
Whole-organism atypical some measurement
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Whole-organism duration
perennial +
Whole-organism some measurement
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Whole organism growth form
tree +, shrub +  and subshrub +
X chromosome quantity
9 +