familyAsteraceae
tribeAsteraceae tribe Astereae
genusSymphyotrichum
subgenusSymphyotrichum subg. Astropolium

Symphyotrichum subg. Astropolium

(Nuttall) Semple in J. C. Semple et al.

in J. C. Semple et al., Cult. Native Asters Ontario, 133. 2002.

Luc Brouillet, John C. Semple, Geraldine A. Allen, Kenton L. Chambers, Scott D. Sundberg†
Basionym: Tripolium subg. Astropolium Nuttall Trans. Amer. Philos. Soc., n. s. 7: 295. 1840
Synonyms: Aster sect. Hesterastrum Bentham Aster sect. Oxytripolium (de Candolle) Torrey & A. Gray Undefined subg. Conyzanthus Tamamschjan Symphyotrichum sect. Oxytripolium (de Candolle) G. L. Nesom Tripolium sect. Oxytripolium de Candolle
Treatment appears in FNA Volume 20. Treatment on page 479. Mentioned on page 461, 466.

Annuals or perennials eglandular; taprooted or rhizomatous. Stems not brittle at maturity, glabrous or glabrate, sometimes sparsely hairy in leaf-axils. Leaves: basal withering by flowering, petiolate, blades 1-nerved, spatulate to ovate or obovate, margins entire or shallowly serrate or crenate; cauline subpetiolate or sessile, blades narrowly lanceolate, linear, or subulate, bases attenuate, slightly sheathing, or ± clasping. Heads radiate. Phyllaries unequal (bases indurate), green zones narrowly lanceolate, spatulate to oblanceolate-rhombic, or rhombic (faces glabrous or sparsely hairy). Ray-florets 10–30 (–54) in 1 series; laminae (1.3–) 5–8.5 (–9.5) × (0.2–) 1.2–2 mm. Disc corollas sometimes weakly ampliate, throats funnelform, lobes ± erect or ± spreading. Cypselae narrowly obovoid to fusiform, sometimes ± compressed, 5–6-nerved, sparsely strigillose or glabrate. x = 5.

Distribution

North America, worldwide

Discussion

Species ca. 10 (3 in the flora).

Selected References

Sundberg, S. D. 1986. The Systematics of Aster Subgenus Oxytripolium (Compositae) and Historically Allied Species. Ph.D. dissertation. University of Texas.

Lower Taxa

... more about "Symphyotrichum subg. Astropolium"
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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
spiciform +, racemiform +, paniculiform +  and corymbiform +
Array development
indeterminate +  and determinate +
Author
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
Authority
(Nuttall) Semple in J. C. Semple et al. +
Band architecture
continuous +
Band quantity
1 +
Basal leaf life cycle
withering +
Basal leaf shape
spatulate;ovate or obovate +
Base architecture
clasping +  and sheathing +
Base shape
attenuate +
Base texture
indurate +
Basionyms
Tripolium subg. Astropolium +
Blade architecture
1-nerved +  and petiolate +
Blade life cycle
flowering +
Blade shape
subulate;linear;subulate;linear;lanceolate +
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 structure in adjective form
stigmatic +
Bristle architecture
barbellulate +  and barbellate +
Bristle pappus duration
persistent +
Bristle shape
Attenuate (?) +
Calyculus presence
absent +
Cauline leaf architecture
sessile +  and subpetiolate +
Corolla architecture
not 2-lipped +  and actinomorphic +
Corolla coloration
purplish +  and reddish or pinkish +
Corolla height or length or size
at maturity , more or less ampliate , tubes usually shorter +
Corolla presence
absent +
Cypsela architecture
5-6-nerved +
Cypsela architecture or shape
beaked +, 2-ribbed +  and 5-ribbed +
Cypsela growth form
dimorphic +
Cypsela pubescence
glabrate +  and strigillose +
Cypsela shape
compressed +, narrowly obovoid +  and fusiform +
Disc-floret atypical quantity
50 (110) +
Disc-floret quantity
15 (50) +
Disc-floret reproduction
fertile +  and bisexual +
Disc corolla size
ampliate +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
North America +  and worldwide +
Embryo course
straight +
Face architecture
eglandular +
Face pubescence
strigillose +, glabrous +, stipitate-glandular +  and hairy +
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 +
Head architecture
disciform +  and radiate +
Head architecture or arrangement
radiate +
Head arrangement
singly +
Head development
indeterminate +
Head reproduction
heterogamous +  and homogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Bee F. Gunn +
Individual head architecture
each +  and sessile +
Involucre diameter
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
Involucre position relational
surrounding +
Involucre shape
campanulate;hemispheric +
Lamina atypical length
0.85 cm8.5 mm <br />0.0085 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
Lamina atypical width
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Lamina length
5mm;8.5mm +
Lamina width
1.2mm;2mm +
Leaf architecture
sessile +  and petiolate +
Leaf arrangement
alternate +
Leaf position
cauline +  and basal +
Line quantity
2 +
Line shape
decurrent +
Lobe atypical quantity
4 (5) +
Lobe orientation
spreading;erect +
Lobe quantity
5 (?) +
Lobe shape
lanceolate +, triangular +  and deltate +
Margin architecture or relief
erose +
Margin architecture or shape
shallowly serrate or crenate +  and entire +
Margin coloration
not +  and hyaline +
Margin pubescence
ciliate +  and scabrous +
Margin shape
entire +, crenate +  and serrate +
Margin texture
scarious +
Nerve atypical quantity
2 (3) +
Nerve quantity
3 (5) +
Number of lower taxa
3 +
Outer phyllarie architecture
foliaceous +
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
barbellate +
Pappus atypical quantity
40 (55) +
Pappus coloration
white +  and brownish +
Pappus duration
persistent +
Pappus quantity
25 +  and 40 +
Pappus variability
equal +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phyllarie architecture
1(-3)-nerved +
Phyllarie duration
persistent +
Phyllarie fusion
distinct +
Phyllarie life cycle
falling +
Phyllarie quantity
20 (84) +
Phyllarie shape
oblanceolate or spatulate +  and linear +
Phyllarie size
unequal +
Phyllarie texture
Herbaceous (Chartaceous or scarious) +
Publication title
in J. C. Semple et al., Cult. Native Asters Ontario, +
Publication year
2002 +
Ray-floret architecture
styliferous +, neuter +  and pistillate +
Ray-floret atypical quantity
30 (54) +
Ray-floret presence
absent +
Ray-floret quantity
10 (30) +
Ray-floret reproduction
sterile +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle relief
pitted +
Receptacle shape
flat;slightly convex +
Reference
sundberg1986a +
Root texture
fibrous +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series architecture
pistillate +
Series atypical quantity
1 (3) +
Series quantity
1 +
Series reproduction
fertile +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20 1076.xml +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +  and simple +
Stem fragility
not brittle +
Stem growth form
vinelike +
Stem orientation
ascending +  and erect +
Stem pubescence
hairy +, glabrate +  and glabrous +
Style-branch appendage shape
lanceolate +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
glabrous +
Style quantity
1 +
Style relief
papillate +  and smooth +
Synonyms
Aster sect. Hesterastrum +, Aster sect. Oxytripolium +, Undefined subg. Conyzanthus +, Symphyotrichum sect. Oxytripolium +  and Tripolium sect. Oxytripolium +
Taxon family
Asteraceae +
Taxon name
Symphyotrichum subg. Astropolium +
Taxon parent
Symphyotrichum +
Taxon rank
subgenus +
Tube height or length or size
at maturity , more or less ampliate , tubes usually shorter +
Tube life cycle
maturity +
Tube size
ampliate +
Volume
Volume 20 +
Whole-organism architecture
rhizomatous +, taprooted +  and eglandular +
Whole-organism duration
perennial +  and annual +
Whole-organism some measurement
2 cm20 mm <br />0.02 m <br /> (200 cm2,000 mm <br />2 m <br />) +
Whole organism growth form
tree +, shrub +  and subshrub +
X chromosome quantity
5 +
Zone coloration
green +
Zone shape
spatulate +  and oblanceolate-rhombic or rhombic +