Hilaria rigida est une espèce de plantes monocotylédones de la famille des Poaceae, sous-famille des Chloridoideae, originaire d'Amérique du Nord. Ce sont des plantes herbacées vivaces, rhizomateuses, aux tiges décombantes pouvant atteindre 100 cm de long, et aux inflorescences composées de racèmes.
No narrative description available for this taxon yet.
⚠ sources differ — GIFT: 0.91 m · USDA: 0.914 m · TRY: 0.757 m
Seed mass7.45 mg
⚠ sources differ — TRY: 7.45 mg · GIFT: 10.6 mg
Seed mass max16.78 mg
Seed mass min2.7 mg
Life cycle & reproduction25
After harvest regrowth rateSlow
Bloom periodLate Spring
Coppice potentialNo
Flower colouryellow
Flower conspicuousNo
Fruit seed period beginSummer
Fruit seed period endSummer
Growth rate USDAModerate
Life formperennial
Life spanperennial
Lifespan categoryLong
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 tubersNo
Raunkiær life formhemicryptophyte
Resprout abilityNo
Seed spread rateSlow
Seedling vigorLow
Vegetative spread rateModerate
Diet & foraging1
Parasiteindependent
Habitat & environment25
Active growth periodSpring and Summer
Adapted to coarse textured soilsYes
Adapted to fine textured soilsYes
Adapted to medium textured soilsYes
Aquaticterrestrial
BloatNone
Climateseasonally dry tropical
Climberself-supporting
Epiphyteterrestrial
Foliage colorGreen
Foliage porosity summerModerate
Foliage porosity winterPorous
Foliage textureFine
Fruit colourbrown
Growth formherb
Growth form USDARhizomatous
Hedge toleranceNone
Known allelopathNo
Leaf retentionYes
Low growing grassNo
Mycorrhiza typearbuscular
Root depth min12 in
Shape and orientationSemi-Erect
Small grainNo
Woodinessnon-woody
Physiology & chemistry22
Anaerobic toleranceNone
C:N ratioMedium
Caco3 toleranceNone
Cold stratification requiredNo
Drought toleranceHigh
Fertility requirementLow
Fire resistantNo
Fire toleranceHigh
Frost free days min220 days
Leaf n16.7 mg/g
Moisture useLow
Nitrogen fixation levelNone
Photosynthetic pathwayC4
Precipitation max12 in
Precipitation min5 in
Protein potentialLow
Salinity toleranceLow
Shade toleranceHigh
Soil pH max8 pH
Soil pH min6 pH
Specific leaf area (SLA)12.28 mm²/mg
Temperature min12 °F
Uses & economy15
Berry nut seed productNo
Christmas tree productNo
Commercial availabilityRoutinely Available
Fodder productYes
Lumber productNo
Naval store productNo
Nursery stock productNo
Palatable browse animalMedium
Palatable graze animalMedium
Palatable humanNo
Post productNo
Pulpwood productNo
Seeds per pound33 000 per lb
ToxicityNone
Veneer productNo
Other traits4
Fall conspicuousNo
Fruit seed abundanceLow
Fruit seed conspicuousNo
Fruit seed persistenceNo
05DNA & barcoding6 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 Hilaria rigida has left across the world's sequence archives.
At a glance
DNA specimens6
Marker genes5
GenBank sequences5
eDNA detections3
Countries1
The DNA barcodea real sequence read deposited for this species
★ 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★rbcL2★rbcLa★ITS3★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualHilaria rigida 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.
Chromosomes2n = 36 n = 18
Ploidydiploid inferred
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 361×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Reeder, J. R. 1984. Chromosome number reports LXXXII. Taxon 33: 126–134.
n 541×CCDB · book-ipcn75-78
CCDB · book-ipcn75-78 — Reeder 1977
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 accuracy93% within 1 km
≤100 m 803≤1 km 75≤10 km 30>10 km 38
946 georeferenced · 708 without coordinates
Open the mapobservation + sensor1 654
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 accuracy57% within 1 km
≤100 m 62≤1 km 93≤10 km 99>10 km 18
272 georeferenced · 620 without coordinates
Open the institutions mapphysical evidence892
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 institutions42 of 59 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
San Diego, US
185
Riverside, US
173
Logan, US
59
ASUlocation not on record
56
Davis, US
47
Claremont, US
47
Phoenix, US
40
Flagstaff, US
25
CASlocation not on record
24
Irvine, US
20
University of Stellenboschlocation not on record
20
US
17
Bronx, US
17
Arcata, US
14
San Luis Obispo, US
14
Los Angeles, US
14
Wuzhou, CN
10
Long Beach, US
9
Mexico City, MX
8
Orem, US
6
Angwin, US
6
DOI/NPS, Colonial National Historical Parklocation not on record
6
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
5
Ann Arbor, US
5
Arizona State University Biocollectionslocation not on record
4
San Jose, US
4
Ensenada, MX
4
Saint Louis, US
4
Lubbock, US
3
Northridge, US
3
Pocatello, US
3
Severin-McDaniel Insect Collectionlocation not on record
3
Henderson, US
2
Chongqing Museumlocation not on record
2
Arizona Western Collegelocation not on record
2
Weber State Universitylocation not on record
2
Provo, US
2
Hermosillo, MX
2
Boise, US
1
Pullman, US
1
San Diego Natural History Museumlocation not on record
1
San Diego Natural History Museum, Herbariumlocation not on record
1
Albuquerque, US
1
Grand Junction, US
1
Austin, US
1
Brasília, BR
1
Cenargenlocation not on record
1
Istituto Agrario Castelnuovolocation not on record
1
Bangkok, TH
1
Auckland, NZ
1
Chapingo, MX
1
Moscow, US
1
Mississippi State, US
1
Eastern Nevada Landscape Coalitionlocation not on record
1
San Bernardino, US
1
Berlin, DE
1
US
1
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
1
University of Alberta Museumslocation not on record
1
59 institutions · 888 of 892 vouchered records shown · 3 without an institution code
09Environmental DNA3 detections
Where the DNA of Hilaria rigida 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 found3
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 3 detections have coordinates
Open the map1 country0
Lower Colorado Desert arroyo vegetation with…
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 median14.1 °C 12.8–15.3
Seasonal swing summer↔winter23.1 °C
Max temp (day)19.8 °C 18.7–20.9
Min temp (night)9.10 °C 8.40–9.80
Precipitation54.8 mm/mo 35.0–74.7
Air humidity52.3 % 48.2–56.3
Moisture balance-50.8 mm/mo -60.7–-40.8
Vapour deficit836 Pa 754–919
Wind speed4.30 m/s 3.10–5.50
Cloud cover37.2 % 36.8–37.6
CHELSA 1981–2010, ~9 km grid, at location & month of 2 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.
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility2 546 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI3 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics6 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗