familyOnagraceae
subfamilyOnagraceae subfam. Onagroideae
tribeOnagraceae tribe Onagreae
genusOenothera
sectionOenothera sect. Oenothera
subsectionOenothera subsect. Emersonia
speciesOenothera organensis

Oenothera organensis

Munz ex S. Emerson

Genetics 23: 190. 1938.

Warren L. Wagner
Basionym: Oenothera macrosiphon Wooton & Standley Contr. U.S. Natl. Herb. 16: 155. 1913
Treatment appears in FNA Volume 10.
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Herbs perennial, moderately hirsute (hairs often with reddish purple, pustulate bases), alsostrigillose and becoming glan­dular puberulent distally; initially from slender taproot with single rosette, later developing numerous adventitious shoots from taproot and lateral roots, root system then appearing fibrous. Stems weakly erect to ascending, many from base, forming clumps 1–1.5 m diam., often branched distally, 30–60 cm. Leaves in a weakly developed basal rosette and cauline, basal 9–23 × 1–2.5 cm, cauline 5–11 × 1.5–3.5 cm; petiole 0.5–1.5 cm; blade very narrowly oblanceolate to narrowly elliptic, margins undulate, remotely and bluntly dentate. Flowers opening near sunset, not strongly scented; buds with free tips terminal, erect, 3–10 mm; floral-tube straight, 100–165 (–190) mm; sepals 25–50 mm; petals yellow, fading deep reddish orange, broadly obovate with truncate apex, or obcordate, 30–55 mm; filaments 18–35 mm, anthers 10–19 mm; style 140–235 mm, stigma exserted beyond anthers at anthesis. Capsules erect to slightly spreading at acute angle from stem, cylindrical, 25–35 ×4–5.5 mm, dehiscent at least 3/4 their length. Seeds numerous, in 2 distinct rows per locule, dark reddish-brown, sometimes with darker flecks, obovoid, asymmetrical, irregularly angled, 1.5–2.1 × 1–1.2 mm, surface irregularly pitted and with collapsed papillae. 2n = 14.


Phenology: Flowering Jun–Sep.
Habitat: In larger rhyolite canyons, along water courses, in eroded basins filled with gravel and rocks.
Elevation: 1800–2300 m.

Distribution

N.Mex.

Discussion

Oenothera organensis is known only from the Organ Mountains, Doña Ana County, especially on the east side. Various studies have been done to assess the status of this narrow endemic and estimate 2000 to 5000 individuals with wide fluctuations likely due to variation in rainfall (W. Dietrich et al. 1985). Oenothera organensis could decline if degradation of habitat increases in the Organ Mountains. The genetics and population biology of this taxon have been heavily studied in the past (summarized in Dietrich et al.). It is self-incompatible.

Selected References

None.

Lower Taxa

None.

No values specified.

... more about "Oenothera organensis"
RDF feed
2n chromosome quantity
14 +
4-locular septum architecture
incomplete +
4-locular septum architecture or structure in adjective form
1-locular +
Androecium position
epigynous +
Angle shape
acute +
Anther fixation
versatile +
Anther some measurement
1 cm10 mm <br />0.01 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
Apex architecture or shape
truncate +
Author
Warren L. Wagner +
Authority
Munz ex S. Emerson +
Basal leaf arrangement
alternate +
Basal leaf position
cauline +
Basal leaf presence
absent +
Basal rosette development
developed +
Basal stem length
9 cm90 mm <br />0.09 m <br /> (23 cm230 mm <br />0.23 m <br />) +
Basal stem width
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Base coloration
pale green +  and yellow usually fading orange purple pale-yellow reddish or whitish +
Base shape
pedicel-like +
Basionyms
Oenothera macrosiphon +
Berry architecture or shape
nutlike +
Berry dehiscence
indehiscent +  and loculicidal +
Blade margin architecture or shape
serrate +
Blade margin shape
subentire +, dentate +, lobed to sinuate-dentate +  and lobed +
Blade shape
very narrowly oblanceolate +  and narrowly elliptic +
Bud orientation
erect +
Bud shape
quadrangular +
Bud some measurement
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Capsule architecture
sessile +
Capsule architecture or shape
nutlike +
Capsule architecture or structure in adjective form
4-locular +
Capsule condition or texture
dry +
Capsule course
straight +
Capsule course or shape
sigmoid +
Capsule dehiscence
dehiscent +
Capsule diameter
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Capsule orientation
erect +  and slightly spreading +
Capsule shape
cylindrical +
Capsule texture
woody +
Capsule width
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Carpel quantity
Many (?) +
Cauline stem length
5 cm50 mm <br />0.05 m <br /> (11 cm110 mm <br />0.11 m <br />) +
Cauline stem width
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Cel reproduction
vegetative +
Distribution
N.Mex. +
Elevation
1800–2300 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
1.8 cm18 mm <br />0.018 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Floral-tube atypical some measurement
16.5 cm165 mm <br />0.165 m <br /> (19 cm190 mm <br />0.19 m <br />) +
Floral-tube course
straight +
Floral-tube duration
deciduous +
Floral-tube presence
absent +
Floral-tube pubescence
hispid +, lanate +  and glabrous +
Floral-tube quantity
, +
Floral-tube some measurement
10 cm100 mm <br />0.1 m <br /> (16.5 cm165 mm <br />0.165 m <br />) +
Flower architecture
zygomorphic +  and actinomorphic +
Flower architecture or arrangement or growth form
solitary +
Flower odor
scented +
Flower part duration
deciduous +
Flower part life cycle
anthesis +
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
In larger rhyolite canyons, along water courses, in eroded basins filled with gravel and rocks. +
Hair height or length or size
short +
Hair position relational
interlocking +
Herb architecture
caulescent +
Herb duration
perennial +
Herb growth form
suffrutescent +
Herb pubescence
puberulent +  and hirsute +
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
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Leaf condition
later +
Leaf duration
deciduous +
Leaf position
cauline +
Leaf presence
absent +
Leaf some measurement
3 cm30 mm <br />0.03 m <br /> (25 cm250 mm <br />0.25 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
dentate +
Margin shape
undulate +
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 +
Perianth position
epigynous +
Petal arrangement
imbricate +
Petal arrangement or shape
convolute +
Petal coloration
reddish orange +, fading +  and yellow +
Petal depth
deep +
Petal presence
absent +
Petal quantity
4 +
Petal shape
obcordate +  and obovate +
Petal some measurement
3 cm30 mm <br />0.03 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
Petiole some measurement
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Phenology
Flowering Jun–Sep. +
Pollen-grain dehiscence or orientation
longitudinal +
Pollen arrangement
singly +
Polyad arrangement
singly +
Proximal part reproduction
sterile +
Publication title
Genetics +
Publication year
1938 +
Raphide quantity
abundant +
Reference
None +
Root system texture
fibrous +
Rosette position
basal +  and cauline +
Rosette quantity
single +
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 or shape
asymmetrical +
Seed atypical quantity
1 (160) +
Seed coloration
dark reddish-brown +
Seed length
0.15 cm1.5 mm <br />0.0015 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
Seed quantity
numerous +
Seed relief
sculptured +  and smooth +
Seed shape
angled +  and obovoid +
Seed size
reduced +
Seed width
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Sepal architecture or dehiscence
splitting +
Sepal arrangement
separate +  and separating +
Sepal arrangement or dehiscence
valvate +
Sepal coloration
purple +, pink +, red +  and green +
Sepal duration
deciduous +
Sepal orientation
reflexed +
Sepal quantity
4 +
Sepal some measurement
2.5 cm25 mm <br />0.025 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 development
developing +
Shoot life cycle
new +
Shoot orientation
arising +
Shoot quantity
numerous +
Shrub architecture
unarmed +
Shrub growth form
not clonal +
Shrub habitat
aquatic +, amphibious +  and terrestrial +
Slit dehiscence or orientation
longitudinal +
Spike architecture
leafy +
Spike architecture or arrangement
lax +
Spike density
dense +
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 +
Stem diameter
100 cm1,000 mm <br />1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
Stem growth form or orientation
decumbent +
Stem orientation
weakly erect +  and ascending +
Stem quantity
many +
Stem some measurement
30 cm300 mm <br />0.3 m <br /> (60 cm600 mm <br />0.6 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
14 cm140 mm <br />0.14 m <br /> (23.5 cm235 mm <br />0.235 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 coloration or relief
reticulate +
Surface architecture or shape
entire +
Surface condition
wet +
Surface duration
persisting +
Surface life cycle
anthesis +
Surface prominence
obscured +
Surface prominence or shape
flat +
Surface quantity
7 (?) +
Surface relief
pitted +
Surface shape
beaded +
Surface size or width
thickened +
Suture quantity
1 +
Taxon family
Onagraceae +
Taxon name
Oenothera organensis +
Taxon parent
Oenothera subsect. Emersonia +
Taxon rank
species +
Tetrad arrangement
singly +
Tetrad dehiscence
3(-5)-aperturate +
Tip fusion
free +
Tip position or structure subtype
terminal +
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 +