familyAsteraceae
tribeAsteraceae tribe Cichorieae
genusPrenanthella
speciesPrenanthella exigua

Prenanthella exigua

(A. Gray) Rydberg

Bull. Torrey Bot. Club 33: 161. 1906.

Kenton L. Chambers
Common names: Brightwhite desert prenanthella
Illustrated
Basionym: Prenanthes exigua A. Gray Smithsonian Contr. Knowl. 5(6): 105. 1853
Synonyms: Lygodesmia exigua (A. Gray) A. Gray
Treatment appears in FNA Volume 19. Treatment on page 360.
Please click on the illustration for a higher resolution version.
Illustrator: Yevonn Wilson-Ramsey

Copyright: Flora of North America Association

Leaves 1–3 cm, reduced distally to bracts 0.5–5 mm. Heads 10–150+. Calyculus bractlets 0.5–1+ mm. Principal phyllaries 3–5 mm after flowering. Corollas 1.5–2 mm. Cypselae 2.5–3.5 mm; pappi: longest bristles 2–3 mm. 2n = 14.


Phenology: Flowering Mar–Jun.
Habitat: Sandy, gravelly, or clay soils, desert washes and open slopes to sagebrush-juniper steppes
Elevation: 20–1900 m

Distribution

V19-571-distribution-map.gif

Ariz., Calif., Colo., Nev., Oreg., Tex., Utah, Mexico (Baja California), Mexico (Sonora)

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Prenanthella exigua"
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2n chromosome quantity
14 +
Anther base shape
tailed +
Anther dehiscence
introrse +
Anther fusion
connate +
Apex shape
acute +
Apex texture
scarious +
Apical appendage development
developed +
Apical appendage shape
ovate +  and lanceolate +
Appendage presence
absent +
Appendage pubescence
hirsute +
Appendage relief
papillate +
Array architecture
paniculiform +
Array development
indeterminate +  and determinate +
Author
Kenton L. Chambers +
Authority
(A. Gray) Rydberg +
Awn pappus duration
persistent +
Awn pappus life cycle
falling +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Basionyms
Prenanthes exigua +
Blade architecture
compound +  and simple +
Blade shape
runcinate;spatulate;oblanceolate +
Body architecture
winged +
Body architecture or shape
ribbed +
Body relief
tuberculate +, rugose +, muricate +  and smooth +
Bract some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Bractlet quantity
2;3 +
Bractlet shape
deltate +
Bractlet size
unequal +  and minute +
Branch fragility or size
stout +
Branch shape
filiform +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellate +
Bristle architecture or pubescence or relief
smooth +
Bristle coloration
white +
Bristle fragility
Stiff (?) +
Bristle fusion
connate +
Bristle relief
coarse +
Bristle shape
Plumose (?) +
Bristle size
unequal +
Calyculus bractlet some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Calyculus presence
absent +
Calyculus quantity
Of 1 (15+ bractlets) +
Common name
Brightwhite +  and desert prenanthella +
Corolla architecture
zygomorphic +, actinomorphic +  and (3-)5-merous +
Corolla coloration
white +  and pink +
Corolla some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Cypsela architecture
grooved +
Cypsela architecture or shape
5-ribbed +  and not beaked +
Cypsela coloration
pale-brown +
Cypsela pubescence
glabrous +
Cypsela relief
rugulose +
Cypsela shape
tapering +  and columnar +
Cypsela some measurement
2.5mm;3.5mm +
Distribution
Ariz. +, Calif. +, Colo. +, Nev. +, Oreg. +, Tex. +, Utah +, Mexico (Baja California) +  and Mexico (Sonora) +
Elevation
20–1900 m +
Embryo course
straight +
Filament fusion
distinct +
Floret architecture
ligulate +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
3;4 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Habitat
Sandy, gravelly, or clay soils, desert washes and open slopes to sagebrush-juniper steppes +
Head architecture
subsessile +
Head arrangement
singly +
Head development
indeterminate +
Head quantity
10;150 +
Head reproduction
homogamous +
Illustration
Present +
Illustration copyright
Flora of North America Association +
Illustrator
Yevonn Wilson-Ramsey +
Individual head architecture
each +  and sessile +
Involucre diameter
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Involucre position relational
surrounding +
Involucre shape
cylindric;ovoid +
Leaf architecture
petiolate +  and sessile +
Leaf arrangement
alternate +
Leaf position
cauline +  and basal +
Leaf size
reduced +
Leaf some measurement
1 cm10 mm <br />0.01 m <br /> (?) +  and 3 cm30 mm <br />0.03 m <br /> (?) +
Longest bristle some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Margin architecture
prickly +
Margin architecture or shape
entire +
Margin coloration
hyaline +
Margin shape
irregularly dentate +  and lobed +
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 life cycle
falling +
Peduncle architecture
bracteate +
Peduncle shape
not inflated +
Pericarp fragility
tough +
Pericarp width
thick +
Petal fusion
connate +
Phenology
Flowering Mar–Jun. +
Phyllary duration
persistent +
Phyllary fusion
connate +  and distinct +
Phyllary growth form or texture
herbaceous +
Phyllary quantity
3 +  and 5 +
Phyllary shape
Linear-lanceolate (?) +
Phyllary size
subequal +  and unequal +
Phyllary variability
equal +
Principal phyllary some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Publication title
Bull. Torrey Bot. Club +
Publication year
1906 +
Receptacle architecture
epaleate +
Receptacle architecture or pubescence or relief
smooth +
Receptacle prominence or shape
flat +
Receptacle pubescence
glabrous +
Receptacle shape
flat;convex +
Reference
None +
Root texture
fibrous +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
5 (15) +
Series quantity
1 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V19 571.xml +
Special status
Illustrated +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +
Stem orientation
erect +
Stem pubescence
glandular-puberulent +  and glabrescent +
Stem quantity
1 +  and 5 +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsute +
Style quantity
1 +
Style relief
papillate +
Synonyms
Lygodesmia exigua +
Taxon family
Asteraceae +
Taxon name
Prenanthella exigua +
Taxon parent
Prenanthella +
Taxon rank
species +
Tooth architecture or shape
spinulose +
Volume
Volume 19 +
Whole-organism architecture
taprooted +
Whole-organism duration
annual +
Whole-organism some measurement
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Whole organism growth form
shrub +  and subshrub +
X chromosome quantity
7 +