familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Madiinae
genusAchyrachaena
speciesAchyrachaena mollis

Achyrachaena mollis

Schauer

Index Seminum (Bratislava) 1837: [3]. 1837.

Bruce G. Baldwin, John L. Strother
Common names: Blow-wives
Illustrated
Treatment appears in FNA Volume 21. Treatment on page 259.
Please click on the illustration for a higher resolution version.
Illustrator: Barbara Alongi

Copyright: Flora of North America Association

Leaf-blades 2–15 cm × 1–7+ mm. Phyllaries 10–20 mm. Ray corollas inconspicuous, laminae usually erect, sometimes spreading, 4–7 mm. Disc corollas 6–10 mm. Cypselae black, 4.5–9 mm; pappi (disc) of 5 outer scales 3–9 mm plus 5 inner scales 6–13 mm. 2n = 16.


Phenology: Flowering Mar–Jun.
Habitat: Grassy, often wet sites, usually with clay-rich soils
Elevation: 0–900 m

Distribution

V21-636-distribution-map.gif

Calif., Oreg., Mexico (Baja California)

Discussion

Achyrachaena mollis grows in low-elevation grasslands, savannas, and open woodlands throughout the California Floristic Province and occurs with vernal tarweeds of the genus Layia. During flowering, pappus scales of each disc floret form cylinders (imparting a honeycomb-like appearance to apices of heads); they are widely spread in fruiting heads. The species is self-compatible and is not known to hybridize with other tarweeds.

Selected References

None.

Lower Taxa

None.
... more about "Achyrachaena mollis"
RDF feed
2n chromosome quantity
16 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther theca coloration
pale +  and dark +
Apex fusion
connate +  and distinct +
Apex growth form or texture
herbaceous +
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
umbelliform +, spiciform +, paniculiform +, glomerulate +  and corymbiform +
Array development
indeterminate +  and determinate +
Author
Bruce G. Baldwin +  and John L. Strother +
Authority
Schauer +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Blade architecture
compound +  and simple +
Blade arrangement or course or shape
linear +
Blade arrangement or shape
linear to linear-elliptic +
Blade shape
lobed;usually spatulate;oblanceolate +
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
barbellulate +  and barbellate +
Bristle shape
Plumose (?) +
Calyculus presence
absent +
Calyculus quantity
2 (12) +
Common name
Blow-wives +
Corolla architecture
zygomorphic +
Corolla coloration
yellow +  and reddish +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
beaked +
Cypsela coloration
black +
Cypsela growth form
dimorphic +
Cypsela pubescence
hairy +  and glabrous +
Cypsela shape
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
Cypsela some measurement
4.5mm;9mm +
Disc-floret architecture
staminate +
Disc-floret quantity
4 (35) +
Disc-floret reproduction
fertile +  and bisexual +
Disc corolla some measurement
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distal leaf architecture
sessile +
Distal leaf arrangement
alternate +
Distribution
Calif. +, Oreg. +  and Mexico (Baja California) +
Elevation
0–900 m +
Embryo course
straight +
Face architecture or function or pubescence
glandular +
Face pubescence
glandular-pubescent +, villous +  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 +
Glomerule arrangement
singly +
Habitat
Grassy, often wet sites, usually with clay-rich soils +
Head architecture or arrangement
radiate +
Head architecture or shape
discoid +
Head arrangement
in loose , more or less corymbiform arrays +  and singly +
Head development
indeterminate +
Head reproduction
homogamous +  and heterogamous +
Illustration
Present +
Illustration copyright
Flora of North America Association +
Illustrator
Barbara Alongi +
Individual head architecture
each +  and sessile +
Inner scale some measurement
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
Involucre diameter
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Involucre position relational
surrounding +
Involucre shape
less campanulate;cylindric or ellipsoid +
Lamina orientation
spreading +  and erect +
Lamina some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Leaf-blade length
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Leaf-blade width
1mm;7mm +
Leaf architecture
petiolate +  and sessile +
Leaf arrangement
alternate +  and opposite +
Leaf position
cauline +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe quantity
5 (?) +
Lobe shape
lance-deltate +
Margin architecture or shape
dentate to pinnatifid or palmatifid +  and entire +
Margin shape
toothed +  and entire +
Number of lower taxa
0 +
Outer scale quantity
5 +
Outer scale some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
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 life cycle
falling +
Pappus presence
absent +
Pappus quantity
5 +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering Mar–Jun. +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary life cycle
falling +
Phyllary presence
absent +
Phyllary quantity
3 +  and 8 +
Phyllary size
unequal +
Phyllary some measurement
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Phyllary texture
Herbaceous (Chartaceous) +
Proximal leaf arrangement
opposite +
Publication title
Index Seminum (Bratislava) +
Publication year
1837 +
Ray-floret architecture
pistillate +
Ray-floret presence
absent +
Ray-floret quantity
3 (8) +
Ray-floret reproduction
fertile +
Ray corolla prominence
inconspicuous +
Ray cypsela shape
clavate +  and obcompressed +
Receptacle architecture
paleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle shape
flat;convex +
Reference
None +
Root texture
fibrous +
Scale coloration
white +
Scale quantity
10 +
Scale shape
oblong +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (2) +
Series quantity
1 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 636.xml +
Special status
Illustrated +
Spine presence
absent +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +
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
Compositae +
Taxon family
Asteraceae +
Taxon name
Achyrachaena mollis +
Taxon parent
Achyrachaena +
Taxon rank
species +
Throat shape
cylindric +
Throat variability
equaling +
Tube height or length or size
much shorter +
Tube variability
equaling +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism duration
annual +
Whole-organism some measurement
4 cm40 mm <br />0.04 m <br /> (62 cm620 mm <br />0.62 m <br />) +
Whole organism atypical some measurement
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Whole organism growth form
shrub +  and subshrub +
Whole organism some measurement
1cm (250cm) +
X chromosome quantity
8 +