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2n chromosome quantity
20 +
Androecium position
epigynous +
Anther coloration
yellow +
Anther fixation
versatile +
Anther length
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Anther orientation
erect +
Anther position
episepalous +
Anther size
subequal +  and longer +
Anther width
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
Apex shape
acute +
Apical notch some measurement
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
Author
Peter C. Hoch +
Authority
(Lindley) Hoch & P. H. Raven +
Base architecture
bulbous +
Base life cycle
anthesis +
Base shape
cuneate +  and attenuate +
Basionyms
Oenothera densiflora +
Beak some measurement
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Berry architecture or shape
nutlike +
Berry dehiscence
indehiscent +  and loculicidal +
Blade atypical length
7.5 cm75 mm <br />0.075 m <br /> (9.2 cm92 mm <br />0.092 m <br />) +
Blade length
1.4 cm14 mm <br />0.014 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
Blade margin shape
toothed +  and entire +
Blade shape
lanceolate +, usually narrowly lanceolate +  and sublinear +
Blade width
0.5 cm5 mm <br />0.005 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Bract architecture or shape
folded +
Bract length
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Bract shape
long-acuminate +, broadly lanceolate +  and ovate or subrotund +
Bract size
reduced +
Bract width
0.3 cm3 mm <br />0.003 m <br /> (?) +  and 1.8 cm18 mm <br />0.018 m <br /> (?) +
Bracteole presence
absent +
Bud architecture
sessile +
Bud orientation
recurved +  and erect +
Bud shape
elongate +
Bud some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Capsule architecture
sessile +  and pedicellate +
Capsule architecture or dehiscence
splitting +
Capsule architecture or shape
nutlike +
Capsule course
curved +  and straight +
Capsule dehiscence
dehiscent +
Capsule shape
cylindrical +  and subfusiform +
Capsule some measurement
0.4 cm4 mm <br />0.004 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Carpel quantity
Many (?) +
Cel prominence
raised +
Cel reproduction
vegetative +
Central axis fragility
strong +
Central column architecture
sessile +
Central column condition
intact +
Central column dehiscence
disintegrating +
Central column duration
persistent +
Coma duration
persistent +
Coma presence
absent +
Common name
Denseflower willowherb +
Distribution
B.C. +, Ariz. +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Mexico (Baja California) +
Elevation
0–2600 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 +
Filament architecture
dithecal +
Filament fixation
basifixed +  and versatile +
Filament fusion
distinct +
Floral-tube architecture
not bulbous +
Floral-tube duration
deciduous +
Floral-tube length
0.13 cm1.3 mm <br />0.0013 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
Floral-tube presence
absent +
Floral-tube quantity
, +
Floral-tube width
1mm +  and 2.2mm +
Flower architecture
actinomorphic +
Flower architecture or arrangement or growth form
solitary +
Flower life cycle
flowering +
Flower orientation
erect +
Flower part duration
deciduous +
Flower part life cycle
anthesis +
Flower prominence
hidden +
Flower reproduction
chasmogamous +
Fruit architecture
sessile +  and pedicellate +
Fruit architecture or dehiscence
splitting +
Fruit course
curved +  and straight +
Fruit dehiscence
dehiscent +
Fruit shape
4-angled +, terete +, narrowly cylindrical +  and fusiform or rarely narrowly ellipsoidal +
Fruit size
slender +
Habitat
Vernally wet places, moist pastures, woodlands, meadows, along streams and ditches, alluvial valleys, often on low ground in volcanic or sandy soils. +
Herb architecture
caulescent +
Herb duration
perennial +  and annual +
Herb growth form
suffrutescent +
Inflorescence architecture
simple +
Inflorescence architecture or arrangement
congested +
Inflorescence architecture or function or pubescence
glandular +
Inflorescence arrangement
mixed +
Inflorescence position
axillary +
Inflorescence position or structure subtype
terminal +
Inflorescence pubescence
puberulent +, strigillose +  and villous +
Lateral-vein prominence
obscure +
Lateral-vein quantity
2 (5) +
Leaf architecture
subsessile +
Leaf architecture or arrangement
fasciculate +
Leaf arrangement
crowded +, alternate +  and opposite +
Leaf duration
early-deciduous +
Leaf position
proximal +, basal +  and cauline +
Line prominence
raised +
Line pubescence
hairy +
Line shape
decurrent +
Lobe quantity
Many (?) +
Locule quantity
1 +
Margin architecture or shape
serrulate +
Margin quantity
5 (12) +
Nectary presence
absent +
Nectary prominence
raised +
Number of lower taxa
0 +
Ovary architecture or function or pubescence
glandular +
Ovary architecture or structure in adjective form
4-locular +
Ovary arrangement
mixed +
Ovary position
inferior +
Ovary pubescence
puberulent +  and villous +
Ovary some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Ovule architecture
bitegmic +
Ovule arrangement or growth form
clustered +
Ovule orientation
anatropous +
Ovule quantity
numerous +  and 1 +
Papilla architecture
multicellular +
Pedicel some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Perianth position
epigynous +
Petal architecture or shape
emarginate +
Petal arrangement
imbricate +
Petal arrangement or shape
convolute +
Petal atypical length
0.95 cm9.5 mm <br />0.0095 m <br /> (1.15 cm11.5 mm <br />0.0115 m <br />) +
Petal atypical width
0.5 cm5 mm <br />0.005 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
Petal coloration
white +, pink +, magenta +  and rose-purple +
Petal length
3mm +  and 9.5mm +
Petal presence
absent +
Petal quantity
4 +
Petal shape
obovate +  and obcordate +
Petal width
0.12 cm1.2 mm <br />0.0012 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Petiole some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Phenology
Flowering May–Oct. +
Pollen-grain dehiscence or orientation
longitudinal +
Pollen fixation
basifixed +
Polyad arrangement
singly +
Proximal branch architecture or function or pubescence
glandular +
Proximal branch arrangement
mixed +
Proximal branch orientation
suberect +  and ascending +
Proximal branch pubescence
puberulent +, strigillose +  and villous +
Publication title
Phytologia +
Publication year
1993 +
Raphide quantity
abundant +
Reference
None +
Rim shape
inflated +
Ring position or shape
distal +
Ring prominence
raised +
Ring some measurement
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Rosette position
basal +  and cauline +
Row quantity
single +, 8 +  and 12 +
Secretion condition
wet +
Secretion condition or texture
dry +
Secretion relief
papillate +
Secretion shape
clavate +  and globose +
Seed atypical length
0.16 cm1.6 mm <br />0.0016 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
Seed coloration
light-brown +
Seed length
0.12 cm1.2 mm <br />0.0012 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Seed quantity
3 +  and 8 +
Seed relief
sculptured +  and smooth +
Seed shape
angular-fusiform +
Seed width
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Sepal arrangement or dehiscence
valvate +
Sepal coloration
lanceolate +, , +, flushed with red or flushed with cream +  and green +
Sepal duration
deciduous +
Sepal length
? (?) +
Sepal orientation
spreading +
Sepal quantity
4 +
Sepal width
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Septum architecture
parenchymatous +
Septum arrangement
parietal +, axile +  and placentation +
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 +
Shrub architecture
unarmed +
Shrub growth form
not clonal +
Shrub habitat
aquatic +, amphibious +  and terrestrial +
Slit dehiscence or orientation
longitudinal +
Species position
proximal +
Spike architecture
leafy +
Spike orientation
erect +
Stamen arrangement
singly +
Stamen filament coloration
dark-pink +
Stamen filament some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
Stamen quantity
8 +
Stamen size or quantity
2 times as many as sepals +
Stem architecture
branched +  and simple +
Stem arrangement
mixed +
Stem growth form or orientation
prostrate +  and decumbent +
Stem orientation
ascending +  and erect +
Stem pubescence
glabrous +, villous +, glandular-puberulent +  and strigillose +
Stem relief
exfoliating +
Stem shape
terete +
Stem some measurement
4 cm40 mm <br />0.04 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
Stigma architecture or shape
entire +
Stigma length
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Stigma quantity
1 +
Stigma shape
subcapitate +  and irregularly 4-lobed +
Stigma structure in adjective form
commissural +
Stigma width
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Stipule architecture
subsessile +  and petiolate +
Stipule duration
caducous +
Stipule position
intrapetiolar +
Stipule presence
absent +
Stipule size
small +
Stolon architecture
tipped +
Style atypical some measurement
0.55 cm5.5 mm <br />0.0055 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
Style coloration
white +
Style orientation
erect +
Style pubescence
glabrous +
Style quantity
1 +
Style some measurement
0.22 cm2.2 mm <br />0.0022 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Subshrub architecture
unarmed +
Subshrub growth form
not clonal +
Subshrub habitat
aquatic +, amphibious +  and terrestrial +
Surface architecture
subsessile +
Surface architecture or coloration or relief
reticulate +
Surface condition or texture
dry +
Surface pubescence
villous +  and strigillose +
Surface quantity
19 (18) +
Surface relief
papillose +  and finely reticulate +
Surface shape
ridged +
Surface size
constricted +
Synonyms
Boisduvalia bipartita +, B. densiflora +, B. densiflora var. bipartita +, B. densiflora var. imbricata +, B. densiflora var. montana +, B. densiflora var. pallescens +, B. densiflora var. salicina +, B. imbricata +, B. salicina +, B. sparsiflora +, B. sparsifolia +  and O. densiflora var. imbricata +
Taxon family
Onagraceae +
Taxon name
Epilobium densiflorum +
Taxon parent
Epilobium sect. Pachydium +
Taxon rank
species +
Tetrad arrangement
singly +
Tetrad dehiscence
3(-5)-aperturate +
Turion arrangement
decussate +
Turion texture
fleshy +
Viscin thread dehiscence or orientation
longitudinal +
Viscin thread fusion
united +
Volume
Volume 10 +