Lactuca dissecta

D.Don · species

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Plantae/Tracheophyta/Magnoliopsida/Asterales/Asteraceae/Lactuca

At a glance

Occurrence records390

Data sources9

Biological traits31

DNA specimens2

eDNA detections2

Sources9 archives

Databases and archives Lactuca dissecta's data was compiled from.

WikipediaWikimedia Foundation4 languages↗

BioWikiNetmultilingual Wikipediamultilingual↗

GBIFGlobal Biodiversity Information Facility390 records↗

ENAEuropean Nucleotide Archive · EMBL-EBI2 eDNA detections↗

BOLD SystemsCentre for Biodiversity Genomics2 specimens↗

GRIN TaxonomyUSDA-ARSdistribution & uses↗

Open Tree of LifeOpenTreephylogeny backbone↗

CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗

PloiDBPloidy Databasegenome & karyotype

On this page6 sections

Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.

NarrativeWikipediaarticle

Traits & measurements2 literature sources31 traits

Occurrence & distributionGBIF390 records

Environmental DNA1 datasets · 0 countries2 detections

DNA & barcodingBOLD2 specimens

Genome at a glanceCCDB2n = 16

01Narrative

Lactuca dissecta, the split-leaf lettuce, is an Asian species of plant in the tribe Cichorieae within the family Asteraceae. It is native to Central Asia, western China (Xinjiang, Tibet), the Himalayas, and southwest Asia as far west as Turkey.Flora of China, Lactuca dissecta D. Don, 1825. 裂叶莴苣 lie ye wo juCzerepanov, S. K. 1981. Sosudistye Rasteniia SSSR 509 pages. Nauka, Leningradskoe Otd-nie, Leningrad.(5)/PJB43(5)2259.pdf Roohi Bano & M. Qaiser. 2010. A taxonomic revision of the genus Lactuca L. (Cichorieae - Asteraceae) from Pakistan and Kashmir. Pakistan Journal of Botany 43(5): 2259-2268 Lactuca dissecta is an annual herb, growing to 40 cm tall. Stems are solitary, erect, branching from the base, branches slender, hairless. Middle and lower part of the whole leaf is inverted-lance-shaped, deeply lobed or pinnately cut, 3–7 cm long, 1–3.5 cm wide, lateral lobes 3-6 pairs, diamond- or fan-shaped, round or toothed comb. Flowers are borne in clusters at the top and then leaves smaller, lanceolate or linear-lanceolate. All leaves are hairless, base stalkless, ear-shaped, arrow-shaped or semi-stem-clasping. Blue flower-heads are bore on top of the stem and branches arranged in loose corymbose inflorescence, each flower head containing ray flowers but no disc flowers. Achenes light brown, oblanceolate, long 2.3 mm, width of 1 mm. Pappus white, thin, hairy, 3 mm long.

No narrative description available for this taxon yet.

02Traits & measurements

SourcesWCVPGIFT

Size & morphology15

Fruit length2.3 mm

Fruit length max2.3 mm

Fruit length min2.3 mm

Fruit width1 mm

Fruit width max1 mm

Fruit width min1 mm

Leaf length50 mm

Leaf length max70 mm

Leaf length min30 mm

Leaf width22.5 mm

Leaf width max35 mm

Leaf width min10 mm

Plant height0.4 m

Plant height max0.5 m

Plant height min0.05 m

Life cycle & reproduction5

Flowering endAug

Flowering startMay

Life formannual

Life spanannual

Raunkiær life formtherophyte

Diet & foraging1

Parasiteindependent

Habitat & environment10

Aquaticterrestrial

Climatetemperate

Climberself-supporting

Elevation max2 800 m

Elevation mean2 000 m

Elevation min500 m

Epiphyteterrestrial

Growth formherb

Habitat GIFTcrop fields, forest, roadsides, semidesert, shrubberies, stony places

Woodinessnon-woody

05DNA & barcoding2 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 Lactuca dissecta has left across the world's sequence archives.

At a glance

DNA specimens2

Marker genes2

eDNA detections2

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★ITS

plant barcodefungal barcode

06Genome at a glanceCCDB

The complete instruction manual Lactuca dissecta 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 = 16 n = 8

Ploidydiploid inferred

Chromosome records16–162n range16median16mode5records

Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references

2n 165×CCDB · ipcn-api-dl · CCDB · book-ipcn73-74 · CCDB · book-indian_vol1 +2

CCDB · ipcn-api-dl — KAUL, M. L. H. 1974. Genecology and evolutionary dynamics of Mecardonia dianthera. Pp. 327-343 in P. Kachroo (ed.) Advancing Frontiers in Cytogenetics. Hindustan Publ. Co., Dehli.

CCDB · book-ipcn73-74 — KAUL, V., & D. SINGH. 1972. Cytological studies in some members of Cichorieae (Compositael. Proc. Indian Sci. Congr. Assoc. 59( III): 366.

CCDB · book-indian_vol1 — Mehra, P.N. & Sidhu, B.S. 1960; Mehra, P.N. et al. 1965 ; Shetty, B.V. 1967; Kaul, V. & Singh, D. 1972 Remanandan, P. & Mehra, P.N. 1974

CCDB · eflora

CCDB · book-fedorov — Mehra P. ~. et al. 1965

n 86×CCDB · iapt · CCDB · book-ipcn65 · CCDB · ipcn-api-dl +1

CCDB · iapt — IAPT/IOPB Chromosome Data 12

CCDB · book-ipcn65 — Mehra et al. 1965

CCDB · ipcn-api-dl — Gupta, R. C. & B. S. Gill. 1989. Cytopalynology of north and central Indian Compositae. J. Cytol. Genet. 24: 96–105.

CCDB · ipcn-api-dl — Razaq, Z. A., A. A. Vahidy & S. I. Ali. 1994. Chromosome numbers in Compositae from Pakistan. Ann. Missouri Bot. Gard. 81: 800–808.

CCDB · ipcn-api-dl — Koul, A. K., A. K. Wakhlu & J. L. KARIHALOO. 1976a. Chromosome numbers of some flowering plants of Jammu (western Himalayas). II. CIS Chromosome Inform. Serv. 20: 32–33.

CCDB · book-ipcn67-71 — SHETTY, B. V. 1967. In IOPB chromosome number reports XIV. Taxon 16: 552-571.

Ploidy records — measured levels and diploid/polyploid inferences · click for sources

diploid inferred1×PloiDB · genus-scale

PloiDB · genus-scale — chromEvol; reliability=1.000 ↗

07Deep time~3.59 Ma lineage

How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.

At a glance

DNA clock origin3.59 Ma TimeTree

When this lineage existed

How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.

DNA clock origin

08Occurrence & distribution

Record type390 records

Wild obs. + sensor20

Museum / vouchered330

Other40

Range

Area of Occupancy AOO1 088 km²

Wildobservation + sensor

Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.

Coordinate accuracy22% within 1 km

≤1 km 4≤10 km 14

18 georeferenced · 2 without coordinates

Open the mapobservation + sensor20

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 accuracy29% within 1 km

≤100 m 3≤1 km 74≤10 km 126>10 km 67

270 georeferenced · 60 without coordinates

Open the institutions mapphysical evidence330

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 institutions8 of 18 geolocated

Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.

Institution	Specimens
QAUlocation not on record	176
GMBAlocation not on record	93
South Kensington, GB	21
Moscow State Universitylocation not on record	12
Herbarium of the Department of Botany, University of Tokyolocation not on record	6
Edinburgh, GB	4
University of Stellenboschlocation not on record	3
Beijing, CN	2
Natural History Museum, Tribhuvan Universitylocation not on record	2
Kunming, CN	1
Academy of Sciences of the Republic of Uzbekistanlocation not on record	1
GJOlocation not on record	1
Baroda, IN	1
Kew, GB	1
WNNUlocation not on record	1
Beijing, CN	1
Saint Louis, US	1
Hazara Universitylocation not on record	1

18 institutions · 328 of 330 vouchered records shown · 2 without an institution code

09Environmental DNA2 detections

Where the DNA of Lactuca dissecta 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 found2

Studies independent surveys1

Signal confidence: weakweighed across independent studies, places & mapped detections

Where its DNA was found

0 of 2 detections have coordinates

Open the map0 countries0

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.

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.

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