Spiranthes parksii, the Navasota ladies' tresses, is a species of orchid that is endemic to Texas, United States. The flower was first discovered in 1945 and was first described by Donovan Stewart Correll in his 1950 book, Native Orchids of North America North of Mexico.
No narrative description available for this taxon yet.
⚠ sources differ — GIFT: 0.46 m · USDA: 0.457 m · TRY: 0.429 m
Seed mass0.004 mg
Seed mass max0.004 mg
Seed mass min0.004 mg
Life cycle & reproduction25
After harvest regrowth rateSlow
Bloom periodLate Summer
Coppice potentialNo
Flower colourwhite
Flower conspicuousYes
Fruit seed period beginSpring
Fruit seed period endFall
Growth rate USDAModerate
Life formperennial
Life spanperennial
Lifespan categoryShort
Propagated by bare rootNo
Propagated by bulbNo
Propagated by containerNo
Propagated by cormNo
Propagated by cuttingsNo
Propagated by seedYes
Propagated by sodNo
Propagated by sprigsNo
Propagated by tubersYes
Raunkiær life formhemicryptophyte
Resprout abilityNo
Seed spread rateSlow
Seedling vigorLow
Vegetative spread rateNone
Diet & foraging1
Parasiteindependent
Habitat & environment24
Active growth periodSpring and Summer
Adapted to coarse textured soilsNo
Adapted to fine textured soilsYes
Adapted to medium textured soilsYes
Aquaticterrestrial
BloatNone
Climatetemperate
Climberself-supporting
Epiphyteterrestrial
Foliage colorGreen
Foliage porosity summerPorous
Foliage porosity winterPorous
Foliage textureFine
Fruit colourbrown
Growth formherb
Growth form USDASingle Crown
Hedge toleranceNone
Known allelopathNo
Leaf retentionNo
Low growing grassNo
Root depth min8 in
Shape and orientationErect
Small grainNo
Woodinessnon-woody
Physiology & chemistry19
Anaerobic toleranceHigh
C:N ratioLow
Caco3 toleranceLow
Cold stratification requiredNo
Drought toleranceNone
Fertility requirementMedium
Fire resistantNo
Fire toleranceMedium
Frost free days min90 days
Moisture useHigh
Nitrogen fixation levelNone
Precipitation max55 in
Precipitation min24 in
Protein potentialLow
Salinity toleranceNone
Shade toleranceHigh
Soil pH max6.5 pH
Soil pH min4.5 pH
Temperature min-38 °F
Uses & economy12
Berry nut seed productNo
Christmas tree productNo
Commercial availabilityRoutinely Available
Fodder productNo
Lumber productNo
Naval store productNo
Nursery stock productNo
Palatable humanNo
Post productNo
Pulpwood productNo
ToxicityNone
Veneer productNo
Other traits6
Fall conspicuousNo
Fruit seed abundanceMedium
Fruit seed conspicuousNo
Fruit seed persistenceNo
Planting density max10 000 per acre
Planting density min2 700 per acre
05DNA & barcoding14 specimens
A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Spiranthes cernua has left across the world's sequence archives.
At a glance
DNA specimens14
Marker genes5
eDNA detections11
Countries1
Marker genes sequenced
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
★matK★rbcL★rbcLa★ITS★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualSpiranthes cernua carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
CCDB · ipcn-api-dl — Sheviak, C. J. 1991. Morphological variation in the compilospecies Spiranthes cernua (L.) L. C. Rich.: ecologically-limited effects of gene flow. Lindleyana 6: 228–234.
CCDB · eflora
CCDB · book-fedorov — Pace 1914 (Duncan 1959)
Ploidy records — measured levels and diploid/polyploid inferences · click for sources
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy58% within 1 km
≤100 m 692≤1 km 124≤10 km 79>10 km 523
1 418 georeferenced · 216 without coordinates
Open the mapobservation + sensor1 634
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Coordinate accuracy31% within 1 km
≤100 m 61≤1 km 316≤10 km 731>10 km 103
1 211 georeferenced · 885 without coordinates
Open the institutions mapphysical evidence2 096
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
10Collections & institutions
Holding institutions71 of 104 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Philadelphia, US
214
Wuzhou, CN
206
Madison, US
179
Ann Arbor, US
114
Bronx, US
112
Toronto, CA
91
Chongqing Museumlocation not on record
87
Bloomington, US
82
New Haven, US
70
Saint Louis, US
64
Chicago, US
61
Acadia Universitylocation not on record
51
Québec, CA
43
South Kensington, GB
41
Green Bay, US
34
International Salmonella Centre (W.H.O.)location not on record
31
Austin, US
27
Université Lavallocation not on record
24
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
23
Montréal, CA
20
DOI/NPS, Mississippi National River & Recreation Arealocation not on record
16
Columbia, US
14
Allentown, US
14
Jackson, US
13
Lincoln, US
13
College Park, US
13
Williamsburg, US
13
Davenport, US
11
Tampa, US
11
Bangkok, TH
10
Fort Worth, US
10
Saint John, CA
10
Tuscaloosa, US
9
Chadron, US
9
Lord Fairfax Community Collegelocation not on record
8
Little Rock, US
8
Philadelphia, US
8
Chapel Hill, US
6
Mississippi State, US
6
Knoxville, US
6
Chicago, US
6
Millersville, US
6
GAlocation not on record
5
Valdosta State Universitylocation not on record
5
Morgantown, US
5
Flagstaff, US
5
Norfolk, US
5
Maryland Department of Natural Resourceslocation not on record
5
Oskarshamn, SE
4
Dekalb, US
4
Conway, US
3
University of Guelph, OAC Herbariumlocation not on record
3
AUAlocation not on record
3
Emporia, US
3
China Agricultural Universitylocation not on record
3
Christchurch, NZ
3
GB
3
New Brunswick, US
3
Jena Microbial Resource Collectionlocation not on record
2
Springfield, US
2
Cambridge, US
2
Claremont, US
2
Paris, FR
2
Henderson State Universitylocation not on record
2
BAYLUlocation not on record
2
Missoula, US
2
Whitewater, US
2
Miami, US
2
Cheney, US
2
Whitehorse, CA
2
Museum of the Rockieslocation not on record
2
Edmonton, CA
2
Pittsburg, US
2
Harvard Universitylocation not on record
1
US
1
Logan, US
1
University of Southern Mississippilocation not on record
1
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
1
Canadian Department of Agriculturelocation not on record
1
Meguro Parasitological Museumlocation not on record
1
Musee des Dinosaures d'Esperaza (Aude)location not on record
1
West Virginia Wesleyan Collegelocation not on record
1
Brock University (BU)location not on record
1
LDlocation not on record
1
Waverly, US
1
Mount Pleasant, US
1
Philadelphia, US
1
Facultad de Zootecnia y Ecología, Universidad Autónoma de Chihuahualocation not on record
1
McWane Science Centerlocation not on record
1
Trois-Rivières, CA
1
Lubbock, US
1
Clemson, US
1
Fairfax, US
1
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
1
Macomb, US
1
Royal Botanical Gardenslocation not on record
1
Montréal, CA
1
Beijing, CN
1
Jefferson City, US
1
Riverside, US
1
Denver, US
1
University of Tennessee at Chattanoogalocation not on record
1
DOI/NPS, Selma to Montgomery National Historic Traillocation not on record
1
Western Carolina Universitylocation not on record
1
104 institutions · 1 917 of 2 096 vouchered records shown · 179 without an institution code
09Environmental DNA11 detections
Where the DNA of Spiranthes cernua was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Detections DNA found11
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 11 detections have coordinates
Open the map1 country0
How strong is each trace?
DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median17.9 °C -5.30–18.4
Seasonal swing summer↔winter28.8 °C
Max temp (day)22.5 °C -0.6–22.5
Min temp (night)15.1 °C -9.40–16.0
Precipitation88.9 mm/mo 87.6–91.3
Air humidity62.0 % 61.5–64.6
Moisture balance-25.1 mm/mo -31.4–58.6
Vapour deficit779 Pa 231–817
Wind speed2.20 m/s 2.20–2.50
Cloud cover41.2 % 40.3–58.0
CHELSA 1981–2010, ~9 km grid, at location & month of 3 detection points · median with p10–p90 · reflects where sampling happened, not only the true niche
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.
WikipediaWikimedia Foundation7 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility3 730 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI11 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics14 specimens↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗