familyOnagraceae
subfamilyOnagraceae subfam. Onagroideae
tribeOnagraceae tribe Onagreae
genusOenothera
sectionOenothera sect. Hartmannia
speciesOenothera texensis

Oenothera texensis

P. H. Raven & D. R. Parnell

Madroño 20: 247. 1970.

Warren L. Wagner
Treatment appears in FNA Volume 10.
Please click on the illustration for a higher resolution version.
Illustrator:

Copyright:

Herbs perennial, caulescent, strigillose and also sparsely hirsute; from slender taproot. Stems several–many, ascending, unbranched or branched, 25–50 cm. Leaves in a basal rosette and cauline, basal (1–) 2.5–6.5 × 0.6–2.3 cm, blade narrowly elliptic to narrowly ovate or ovate, margins weakly serrulate to sinuate-pinnatifid; cauline 1–5.5 × 0.6–2 cm, blade narrowly elliptic to narrowly ovate, margins weakly serrulate. Inflores­cences erect. Flowers 1–3 opening per day near sunrise; buds with free tips 0–1 mm; floral-tube 15–26 mm; sepals 15–23 mm; petals rose-purple, fading darker, 12–25 (–30) mm; filaments 9–13 mm, anthers 3.5–6mm, pollen 85–100% fertile; style 26–36 mm, stigma exserted beyond anthers at anthesis. Capsules clavate or narrowly obovoid, 9–15 × 3.5–6 mm, apex atten­uate to a sterile beak, valve midrib prominent in distal part, proximal stipe 7–12 (–28) mm, gradually taperingto base; sessile. Seeds narrowly obovoid, 0.8–1 × 0.2–0.4 mm. 2n = 14.


Phenology: Flowering May–Sep.
Habitat: Sandy and gravel bars of streambeds and along streams.
Elevation: 900–2500 m.

Distribution

Tex., Mexico (Coahuila), Mexico (Tamaulipas)

Discussion

In the flora area, Oenothera texensis is known only from Jeff Davis County.

Selected References

None.

Lower Taxa

None.
... more about "Oenothera texensis"
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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
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Apex shape
attenuate +
Author
Warren L. Wagner +
Authority
P. H. Raven & D. R. Parnell +
Basal leaf arrangement
alternate +
Basal leaf position
cauline +
Basal leaf presence
absent +
Basal stem atypical length
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Basal stem length
2.5 cm25 mm <br />0.025 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
Basal stem width
0.6 cm6 mm <br />0.006 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
Base coloration
pale green +  and yellow usually fading orange purple pale-yellow reddish or whitish +
Base reproduction
sterile +
Base shape
pedicel-like +
Basionyms
Hartmannia +
Beak reproduction
sterile +
Berry architecture or shape
nutlike +
Berry dehiscence
indehiscent +  and loculicidal +
Blade margin shape
sinuate-pinnatifid +, weakly serrate +  and weakly sinuate-toothed +
Blade shape
narrowly elliptic +  and narrowly ovate +
Bud orientation
erect +
Bud shape
terete +
Capsule architecture
winged +
Capsule architecture or shape
nutlike +
Capsule architecture or structure in adjective form
4-locular +
Capsule condition or texture
dry +
Capsule course
straight +
Capsule dehiscence
indehiscent +  and dehiscent +
Capsule length
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Capsule shape
obovoid +  and clavate +
Capsule some measurement
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Capsule texture
leathery +  and hard +
Capsule width
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Carpel quantity
Many (?) +
Cel reproduction
vegetative +
Distribution
Tex. +, Mexico (Coahuila) +  and Mexico (Tamaulipas) +
Elevation
900–2500 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
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
Floral-tube duration
deciduous +
Floral-tube presence
absent +
Floral-tube pubescence
hispid +, lanate +  and glabrous +
Floral-tube quantity
, +
Floral-tube some measurement
1.5 cm15 mm <br />0.015 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
Flower architecture
zygomorphic +  and actinomorphic +
Flower architecture or arrangement or growth form
solitary +
Flower part duration
deciduous +
Flower part life cycle
anthesis +
Flower quantity
1 +  and 3 +
Flower reproduction
bisexual +
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
Sandy and gravel bars of streambeds and along streams. +
Hair height or length or size
short +
Hair position relational
interlocking +
Herb architecture
caulescent +
Herb duration
perennial +
Herb growth form
suffrutescent +
Herb pubescence
hirsute +  and strigillose +
Illustration
Present +
Indusium architecture
peltate +
Indusium prominence
conspicuous +
Inflorescence position
axillary +
Lateral root orientation
spreading +
Leaf-axil orientation
nodding +  and erect +
Leaf architecture
simple +
Leaf arrangement
alternate +
Leaf atypical some measurement
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Leaf condition
later +
Leaf duration
deciduous +
Leaf position
cauline +
Leaf presence
absent +
Leaf some measurement
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Lobe arrangement or course or shape
linear +
Lobe quantity
4 (?) +
Locule arrangement or growth form
clustered +
Locule quantity
many +
Margin architecture or shape
serrulate +
Margin orientation
erect +
Margin position
cauline +
Margin shape
weakly serrulate +  and sinuate-pinnatifid +
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 +
Part architecture
sessile +
Part reproduction
fertile +
Perianth position
epigynous +
Petal arrangement
imbricate +
Petal arrangement or shape
convolute +
Petal atypical some measurement
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Petal coloration
fading darker +  and rose-purple +
Petal presence
absent +
Petal quantity
4 +
Petal shape
obovate +  and obcordate +
Petal some measurement
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Phenology
Flowering May–Sep. +
Pollen-grain dehiscence or orientation
longitudinal +
Pollen arrangement
singly +
Pollen reproduction
fertile +
Polyad arrangement
singly +
Proximal part reproduction
sterile +
Proximal part shape
tapering +
Proximal stipe architecture
sessile +
Proximal stipe atypical some measurement
1.2 cm12 mm <br />0.012 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
Proximal stipe some measurement
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Publication title
Madroño +
Publication year
1970 +
Raphide quantity
abundant +
Reference
None +
Rosette position
basal +  and cauline +
Row atypical quantity
2 (4) +
Row quantity
2 +  and 1 +
Secretion condition
wet +
Secretion condition or texture
dry +
Secretion relief
papillate +
Secretion shape
clavate +  and globose +
Seed arrangement or growth form
clustered +
Seed atypical quantity
1 (160) +
Seed length
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Seed quantity
numerous +
Seed relief
sculptured +  and smooth +
Seed shape
obovoid +
Seed size
reduced +
Seed width
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Sepal architecture or dehiscence
splitting +
Sepal arrangement
separating +
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
1.5 cm15 mm <br />0.015 m <br /> (2.3 cm23 mm <br />0.023 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 life cycle
new +
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
branched +  and unbranched +
Stem growth form or orientation
decumbent +
Stem orientation
ascending +
Stem quantity
several +  and many +
Stem some measurement
25 cm250 mm <br />0.25 m <br /> (50 cm500 mm <br />0.5 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
2.6 cm26 mm <br />0.026 m <br /> (3.6 cm36 mm <br />0.036 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 pubescence or relief or texture
granular +
Surface quantity
7 (?) +
Surface reflectance
glossy +
Surface relief
papillose +
Surface shape
beaded +
Synonyms
Oenothera +, Oenothera subg. Hartmannia +, Oenothera sect. Xylopleurum +, Oenothera subg. Xylopleurum +  and Xylopleurum +
Taxon family
Onagraceae +
Taxon name
Oenothera texensis +
Taxon parent
Oenothera sect. Hartmannia +
Taxon rank
species +
Tetrad arrangement
singly +
Tetrad dehiscence
3(-5)-aperturate +
Tip fusion
free +
Tip size
minute +
Tip some measurement
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Valve midrib dehiscence
dehiscent +
Valve midrib prominence
prominent +
Viscin thread dehiscence or orientation
longitudinal +
Viscin thread fusion
united +
Volume
Volume 10 +
Wall texture
woody +  and hard +
Wing architecture
smooth +  and erose +
Wing condition or texture
dry +
Wing relief
papillate +
Wing width
thick +