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2n chromosome quantity
14 +
4-locular septum architecture
incomplete +
4-locular septum architecture or structure in adjective form
1-locular +
Androecium position
epigynous +
Anther fixation
versatile +
Anther some measurement
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Apex dehiscence
dehiscent +
Apex length
1/4;1/3 +
Apex shape
long-attenuate +
Apex size
constricted +
Apex width
7mm +  and 8mm +
Author
Warren L. Wagner +
Authority
W. L. Wagner +
Basal leaf arrangement
alternate +
Basal leaf position
cauline +
Basal leaf presence
absent +
Basal rosette atypical width
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Basal rosette width
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Base coloration
pale green +  and yellow usually fading orange purple pale-yellow reddish or whitish +
Base shape
pedicel-like +
Basionyms
Lavauxia spach +
Beak height or length or size
short +
Berry architecture or shape
nutlike +
Berry dehiscence
indehiscent +  and loculicidal +
Blade arrangement or shape
elliptic +  and linear to very +
Blade margin shape
lobed +  and dentate or subentire +
Bud orientation
erect +
Bud shape
quadrangular +
Capsule architecture
winged +
Capsule architecture or shape
nutlike +
Capsule architecture or structure in adjective form
4-locular +
Capsule condition or texture
dry +
Capsule course
curved +  and straight +
Capsule dehiscence
indehiscent +  and dehiscent +
Capsule shape
oblong-oblanceoloid +
Capsule texture
leathery +
Carpel quantity
Many (?) +
Cel reproduction
vegetative +
Distribution
Colo. +  and Utah. +
Elevation
1800–2400(–2600) m. +
Embryo-sac coating
oily +
Embryo-sac course
straight +
Embryo-sac presence
absent +
Embryo coating
oily +
Embryo course
straight +
Embryo presence
absent +
Endosperm coating
oily +
Endosperm course
straight +
Endosperm presence
absent +
Epidermis coloration
whitish +  and green +
Epidermis relief
exfoliating +
Filament architecture
dithecal +
Filament fixation
basifixed +  and versatile +
Filament fusion
distinct +
Filament some measurement
2.1 cm21 mm <br />0.021 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Floral-tube atypical some measurement
5.3 cm53 mm <br />0.053 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Floral-tube duration
deciduous +
Floral-tube presence
absent +
Floral-tube pubescence
hispid +, lanate +  and glabrous +
Floral-tube quantity
, +
Floral-tube some measurement
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flower architecture
zygomorphic +  and actinomorphic +
Flower architecture or arrangement or growth form
solitary +
Flower odor
unscented +
Flower part duration
deciduous +
Flower part life cycle
anthesis +
Flower quantity
1 +  and 3 +
Flower reproduction
bisexual +
Flowers petal coloration
purple +  and lavender +
Fruit architecture
winged +
Fruit course
curved +  and straight +
Fruit dehiscence
indehiscent +  and dehiscent +
Fruit shape
4-angled +, terete +, tapering +, cylindrical +, ellipsoid +, clavate +, ovoid ellipsoid +  and cylindrical rhombic-obovoid or globose +
Habitat
Restricted to sandy and gravelly, reddish, soil in seasonally wet sites, meadows, depressions, along arroyos, among rocks, in mixed conifer forests, sagebrush scrub. +
Hair height or length or size
short +
Hair position relational
interlocking +
Herb architecture
short-caulescent +
Herb architecture or function or pubescence
glandular +
Herb duration
perennial +
Herb growth form
suffrutescent +
Herb pubescence
hirsute +, puberulent +  and strigillose +
Indusium architecture
peltate +
Indusium prominence
conspicuous +
Inflorescence position
axillary +
Lateral root length or size
long +
Lateral root orientation
spreading +
Lateral root quantity
several +
Leaf-axil orientation
nodding +  and erect +
Leaf architecture
simple +
Leaf arrangement
alternate +
Leaf atypical length
14 cm140 mm <br />0.14 m <br /> (18 cm180 mm <br />0.18 m <br />) +
Leaf atypical some measurement
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Leaf condition
later +
Leaf duration
deciduous +
Leaf fragility
stiff +
Leaf length
7 cm70 mm <br />0.07 m <br /> (14 cm140 mm <br />0.14 m <br />) +
Leaf position
cauline +
Leaf presence
absent +
Leaf some measurement
8 cm80 mm <br />0.08 m <br /> (36 cm360 mm <br />0.36 m <br />) +
Lobe arrangement or course or shape
linear +
Lobe quantity
4 (?) +
Locule arrangement or growth form
clustered +
Locule quantity
3 +
Margin shape
lobed +  and dentate +
Mouth condition
closing +
Nectary presence
absent +
Number of lower taxa
0 +
Ovary architecture
pedicellate +  and sessile +
Ovary architecture or structure in adjective form
1-locular +
Ovary position
inferior +
Ovule architecture
bitegmic +
Ovule arrangement or growth form
clustered +
Ovule orientation
anatropous +
Ovule quantity
1 +  and 8 +
Pair arrangement
separating +
Pair life cycle
anthesis +
Perianth position
epigynous +
Petal arrangement
imbricate +
Petal arrangement or shape
convolute +
Petal coloration
purplish brown +, reddish orange +, fading +  and bright-yellow +
Petal condition
drying +
Petal depth
deep +
Petal presence
absent +
Petal quantity
4 +
Petal shape
obcordate +  and obovate +
Petal some measurement
2.8 cm28 mm <br />0.028 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Petiole atypical some measurement
1.2 cm12 mm <br />0.012 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Petiole some measurement
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Phenology
Flowering May–Jun. +
Pollen-grain dehiscence or orientation
longitudinal +
Pollen arrangement
singly +
Polyad arrangement
singly +
Proximal part reproduction
sterile +
Publication title
Syst. Bot. +
Publication year
1981 +
Raphide quantity
abundant +
Reference
None +
Root position
lateral +
Rosette position
basal +  and cauline +
Row atypical quantity
2 (4) +
Row fusion
distinct +
Row quantity
2 +
Secretion condition
wet +
Secretion condition or texture
dry +
Secretion relief
papillate +
Secretion shape
clavate +  and globose +
Seed architecture
winged +
Seed arrangement
adjacent +
Seed atypical quantity
1 (160) +
Seed quantity
numerous +
Seed relief
sculptured +  and smooth +
Seed shape
cuneiform +
Seed size
reduced +
Seed some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Sepal architecture or dehiscence
splitting +
Sepal arrangement or dehiscence
valvate +
Sepal coloration
purple +, pink +, red +  and green +
Sepal duration
deciduous +
Sepal fusion
coherent +
Sepal orientation
reflexed +
Sepal quantity
4 +
Sepal some measurement
2.6 cm26 mm <br />0.026 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Septum architecture
incomplete +
Septum arrangement
parietal +, axile +  and placentation +
Septum fragility
fragile +
Septum presence
absent +
Septum width
thin +
Series length or size
longer +
Series quantity
2 +
Series size
unequal +
Series variability
equal +
Set length or size
longer +
Set quantity
2 +
Set variability
equal +
Shoot derivation
adventitious +
Shoot orientation
arising +
Shrub architecture
unarmed +
Shrub growth form
not clonal +
Shrub habitat
aquatic +, amphibious +  and terrestrial +
Slit dehiscence or orientation
longitudinal +
Spike architecture
leafy +
Stamen quantity
8 +
Stamen size
in 2 unequal series +  and subequal +
Stamen size or quantity
2 times as many or as many as sepals +
Stem architecture
leafy +
Stem growth form or orientation
decumbent +
Stem orientation
ascending +
Stem quantity
[1 +
Stem some measurement
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Stigma architecture
peltate +
Stigma development
developing +
Stigma quantity
1 +
Stigma shape
divided +
Stipule architecture
petiolate +  and sessile +
Stipule duration
caducous +
Stipule position
intrapetiolar +
Stipule presence
absent +
Stipule size
small +
Style pubescence
pubescent +  and glabrous +
Style quantity
1 +
Style some measurement
7.5 cm75 mm <br />0.075 m <br /> (14.3 cm143 mm <br />0.143 m <br />) +
Subshrub architecture
unarmed +
Subshrub growth form
not clonal +
Subshrub habitat
aquatic +, amphibious +  and terrestrial +
Surface architecture
smooth +, reticulate +  and furrowed +
Surface architecture or shape
entire +
Surface condition
wet +
Surface duration
persisting +
Surface life cycle
anthesis +
Surface prominence
obscured +
Surface quantity
7 (?) +
Surface relief
rugose +, papillose +  and non-papillate +
Surface shape
beaded +
Synonyms
Oenothera flava var. acutissima +
Taxon family
Onagraceae +
Taxon name
Oenothera acutissima +
Taxon parent
Oenothera subsect. Lavauxia +
Taxon rank
species +
Tetrad arrangement
singly +
Tetrad dehiscence
3(-5)-aperturate +
Tip fusion
free +
Tip size
unequal +
Tip some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Valve surface architecture
sessile +
Vein prominence
inconspicuous +
Viscin thread dehiscence or orientation
longitudinal +
Viscin thread fusion
united +
Volume
Volume 10 +
Wall texture
woody +  and hard +
Wing architecture
sessile +
Wing atypical length
1.8 cm18 mm <br />0.018 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
Wing condition or texture
dry +
Wing dehiscence
dehiscent +
Wing length
1.4 cm14 mm <br />0.014 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Wing relief
papillate +
Wing shape
oblong +
Wing size
constricted +
Wing width
broadest +, 1mm +  and 2mm +