familyAsteraceae
tribeAsteraceae tribe Astereae
genusAmphiachyris
speciesAmphiachyris amoena

Amphiachyris amoena

(Shinners) Solbrig

Rhodora 62: 52. 1960.

Guy L. Nesom
Common names: Texas broomweed
Endemic
Basionym: Xanthocephalum amoenum Shinners Field & Lab. 19: 77. 1951 Gutierrezia amoena (Shinners) Diggs Lipscomb & O’Kennon
Treatment appears in FNA Volume 20. Treatment on page 88.
Revision as of 20:29, 29 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Plants 20–40 (–60) cm. Primary-stems usually (2–) 5 mm diam. Leaf-blades linear, rarely linear-lanceolate, 5–25 (–35) × 0.2–1 (–2) mm. Heads in open paniculiform arrays. Phyllaries 3–4 × 1–2 mm. Receptacles with hooked, swollen-based hairs. Cypselae 2–3 mm, 4–6-ribbed, long-setulose. 2n = 8.


Phenology: Flowering late Sep–Oct.
Habitat: Calcareous soils and gravels on or near limestone outcrops
Elevation: 0–650 m

Distribution

V20-168-distribution-map.gif

Tex.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Amphiachyris amoena"
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2n chromosome quantity
8 +
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 +  and open +
Array development
indeterminate +  and determinate +
Author
Guy L. Nesom +
Authority
(Shinners) Solbrig +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Basionyms
Xanthocephalum amoenum +  and Gutierrezia amoena +
Blade architecture
compound +  and simple +
Blade shape
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
Texas broomweed +
Corolla architecture
not 2-lipped +  and actinomorphic +
Corolla coloration
yellow +  and orange-tinged +
Corolla condition
drying +
Corolla presence
absent +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
4-6-ribbed +
Cypsela growth form
dimorphic +
Cypsela pubescence
long-setulose +
Cypsela shape
obovoid-turbinate +
Cypsela size
plump +
Cypsela some measurement
2mm;3mm +
Disc-floret architecture
staminate +
Disc-floret quantity
10 (21) +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Tex. +
Elevation
0–650 m +
Embryo course
straight +
Face coating
resinous +
Face coloration
whitish;gland-dotted +
Face length or size
long +
Face pubescence
short-setulose +
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
Calcareous soils and gravels on or near limestone outcrops +
Hair architecture
swollen-based +
Hair shape
hooked +
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 diameter
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Involucre position relational
surrounding +
Involucre shape
narrowly campanulate;turbinate +
Leaf-blade arrangement or course or shape
linear +
Leaf-blade atypical length
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Leaf-blade atypical width
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Leaf-blade length
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Leaf-blade shape
linear-lanceolate +
Leaf-blade width
0.2mm;1mm +
Leaf architecture
sessile +
Leaf arrangement
alternate +
Leaf position
cauline +
Line quantity
2 +
Lobe atypical quantity
4 (5) +
Lobe orientation
erect +
Lobe quantity
5 (?) +
Lobe shape
deltate +
Margin architecture or shape
entire +
Margin coloration
hyaline +
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 +
Pappus shape
coroniform +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering late Sep–Oct. +
Phyllarie architecture
1-nerved +
Phyllarie duration
persistent +
Phyllarie fusion
distinct +
Phyllarie length
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Phyllarie life cycle
falling +
Phyllarie position
proximal +
Phyllarie quantity
2/3 (12) +
Phyllarie shape
ovate +
Phyllarie size
unequal +
Phyllarie texture
Indurate (?) +
Phyllarie width
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Primary-stem diameter
5 cm50 mm <br />0.05 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Publication title
Rhodora +
Publication year
1960 +
Ray-floret architecture
pistillate +
Ray-floret presence
absent +
Ray-floret quantity
7 (12) +
Ray-floret reproduction
fertile +
Receptacle architecture
epaleate +
Receptacle architecture or pubescence or relief
smooth +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle shape
flat;slightly convex +
Reference
None +
Root texture
fibrous +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
2 (3) +
Series quantity
1;2 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20 168.xml +
Special status
Endemic +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +
Stem orientation
erect +
Style-branch appendage fusion
fused +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
glabrous +
Style quantity
1 +
Style relief
papillate +  and smooth +
Synonyms
Compositae +
Taxon family
Asteraceae +
Taxon name
Amphiachyris amoena +
Taxon parent
Amphiachyris +
Taxon rank
species +
Throat shape
cylindric +
Tube height or length or size
shorter +
Volume
Volume 20 +
Whole-organism atypical some measurement
100 cm1,000 mm <br />1 m <br /> (200 cm2,000 mm <br />2 m <br />) +
Whole-organism duration
annual +
Whole-organism some measurement
20 cm200 mm <br />0.2 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Whole organism atypical some measurement
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Whole organism growth form
plant +
Whole organism some measurement
20cm (40cm) +
X chromosome quantity
5 +  and 4 +