familyAsteraceae
tribeAsteraceae tribe Astereae
genusAphanostephus
speciesAphanostephus skirrhobasis

Aphanostephus skirrhobasis

(de Candolle) Trelease

Rep. (Annual) Arkansas Geol. Surv. 4: 191. 1891.

Guy L. Nesom
Common names: Arkansas lazydaisy
Basionym: Keerlia skirrhobasis de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 310. 1836
Treatment appears in FNA Volume 20. Treatment on page 352. Mentioned on page 351.

Annuals, 5–45 cm; vestiture hirsuto-pilose and/or puberulent, stem hairs spreading to deflexed, 0.1–0.3 mm. Phyllary apices acute to short-acuminate. Ray-florets (10–) 25–45. Disc-floret corollas: bases (mature) bulbous-swollen, indurate. Cypselae: hairs apically 1-directionally coiled; pappi usually coroniform, uneven, rarely of acute to awn-tipped scales 0.2–2 mm.

Distribution

Created with Raphaël 2.2.0
V20-808-distribution-map.gif

Ark., Fla., Kans., La., N.Mex., Okla., Tex., n Mexico

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Lower Taxa

Key

1 Leaves thickened, densely, almost felty gray-hairy; sand dunes along Gulf Coast Aphanostephus skirrhobasis var. thalassius
1 Leaves not strongly thickened or felty gray-hairy; sandy soils, interior localities > 2
2 Pappi of acute or awn-tipped scales or setiform scales 0.4–2 mm Aphanostephus skirrhobasis var. kidderi
2 Pappi coroniform, uneven, ciliate, 0.1–0.3 mm, rarely of awn-tipped scales Aphanostephus skirrhobasis var. skirrhobasis
... more about "Aphanostephus skirrhobasis"
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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
Guy L. Nesom +
Authority
- de Candolle Trelease +
Band architecture
continuous +
Band quantity
1 +
Base shape
bulbous-swollen +
Base texture
indurate +
Basionyms
Keerlia skirrhobasis +
Blade architecture
1-nerved +
Blade shape
broadly oblanceolate;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 +
Calyculus presence
absent +
Common name
Arkansas lazydaisy +
Corolla architecture
not 2-lipped +  and actinomorphic +
Corolla coloration
yellow +  and white +
Corolla presence
absent +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
4-12-thick-ribbed +
Cypsela growth form
dimorphic +
Cypsela shape
subterete +, 4-angled +  and angular-columnar +
Disc-floret quantity
25 - 400 +
Disc-floret reproduction
fertile +  and bisexual +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Ark. +, Fla. +, Kans. +, La. +, N.Mex. +, Okla. +, Tex. +  and n Mexico +
Embryo course
straight +
Face pubescence
glabrous +, strigose +, hirsute +  and hispid +
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 +
Hair architecture
coiled +
Head architecture or arrangement
radiate +
Head arrangement
singly +
Head development
indeterminate +
Head reproduction
heterogamous +  and homogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Barbara Alongi +
Individual head architecture
each +  and sessile +
Involucre length
0.35 cm3.5 mm <br />0.0035 m <br /> - 0.8 cm8 mm <br />0.008 m <br /> +
Involucre position relational
surrounding +
Involucre shape
depressed-hemispheric +
Involucre width
0.4 cm4 mm <br />0.004 m <br /> - 1 cm10 mm <br />0.01 m <br /> +
Leaf architecture
petiolate +  and sessile +
Leaf arrangement
alternate +
Leaf position
cauline +  and basal +
Line quantity
2 +
Lobe atypical quantity
4 - 5 +
Lobe orientation
erect +
Lobe quantity
5 - ? +
Lobe shape
deltate +
Margin architecture or shape
dentate to pinnatifid +  and entire +
Margin shape
pinnatifid +  and entire +
Margin texture
scarious +
Midstripe coloration
purplish +
Midstripe width
broad +
Number of lower taxa
3 +
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 duration
persistent +
Pappus presence
absent +
Pappus shape
coroniform +
Pappus variability
uneven +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 - 3+ series +
Petal fusion
connate +
Phyllarie architecture
1-nerved +
Phyllarie duration
persistent +
Phyllarie fixation or orientation
appressed +
Phyllarie fusion
distinct +
Phyllarie life cycle
falling +
Phyllarie quantity
25 - 50 +
Phyllarie shape
ovatelanceolate +
Phyllarie size
unequal +  and subequal +
Phyllarie texture
Herbaceous - Chartaceous or scarious +
Phyllary apex shape
acute +  and short-acuminate +
Publication title
Rep. - Annual Arkansas Geol. Surv. +
Publication year
1891 +
Ray-floret architecture
pistillate +
Ray-floret atypical quantity
10 - 25 +
Ray-floret presence
absent +
Ray-floret quantity
25 - 45 +
Ray-floret reproduction
fertile +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle relief
pitted +
Receptacle shape
conic +
Reference
None +
Root texture
fibrous +
Scale architecture
awn-tipped +
Scale coloration
tan +
Scale fusion
connate +
Scale shape
acute +
Scale some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 - 2 +
Series quantity
1;3;4 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20 808.xml +
Stamen arrangement
alternate +
Stamen atypical quantity
4 - 5 +
Stamen quantity
5 +
Stem architecture
branched +
Stem hair orientation
Spreading - Deflexed +
Stem hair some measurement
0.01 cm0.1 mm <br />1.0e-4 m <br /> - 0.03 cm0.3 mm <br />3.0e-4 m <br /> +
Stem orientation
deflexed +, erect +  and decumbent or ascending +
Stem pubescence
spreading-hairy +
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
Keerlia de +
Taxon family
Asteraceae +
Taxon name
Aphanostephus skirrhobasis +
Taxon parent
Aphanostephus +
Taxon rank
species +
Tube shape
tubular +
Vestiture pubescence
puberulent +  and hirsuto-pilose +
Volume
Volume 20 +
Whole-organism architecture
taprooted +
Whole-organism duration
annual +
Whole-organism some measurement
5 cm50 mm <br />0.05 m <br /> - 45 cm450 mm <br />0.45 m <br /> +
Whole organism growth form
tree +, shrub +  and subshrub +
X chromosome quantity
5 +