Streptanthus hammittii

(S.Boyd & T.S.Ross) Al-Shehbaz · species

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Plantae/Tracheophyta/Magnoliopsida/Brassicales/Brassicaceae/Streptanthus

At a glance

Occurrence records0

Data sources5

Biological traits10

DNA specimens0

eDNA detections4

Sources5 archives

Databases and archives Streptanthus hammittii's data was compiled from.

WikipediaWikimedia Foundation1 languages↗

ENAEuropean Nucleotide Archive · EMBL-EBI4 eDNA detections↗

GRIN TaxonomyUSDA-ARSdistribution & uses↗

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

PloiDBPloidy Databasegenome & karyotype

On this page4 sections

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

NarrativeWikipediaarticle

Traits & measurements3 literature sources10 traits

Environmental DNA1 datasets · 0 countries4 detections

Genome at a glanceCCDB2n = 28

01Narrative

Sibaropsis is a monotypic genus of flowering plants in the family Brassicaceae containing the single species Sibaropsis hammittii, which is known by the common name Hammitt's clay-cress. It is endemic to California, where it is known from two locations in the Peninsular Ranges. The plant is known from the Santa Ana Mountains of Riverside County and Viejas Mountain and nearby peaks east of San Diego. It grows in grassy habitat in openings in chaparral alongside purple needlegrass (Nassella pulchra), generally in moist areas in heavy clay soils. This species and its genus were first described to science in 1997.Boyd, S. and T. S. Ross. (1997). Sibaropsis (Brassicaceae), a new monotypic genus from southern California. Madroño 44:1 29-47. This is an annual herb producing a waxy, hairless or slightly hairy stem up to about 20 centimeters tall. The leaves are linear in shape, measuring up to 4.5 centimeters long and about a millimeter wide. The inflorescence produces mustardlike flowers with four spoon-shaped, dark-veined, purple-pink petals each about a centimeter long. The fruit is a long, narrow, flat silique measuring 1.5 to 2.5 centimeters long and under a millimeter wide. This fruit contains up to 44 minute seeds.

No narrative description available for this taxon yet.

02Traits & measurements

SourcesWCVPGIFTTRY

Life cycle & reproduction3

Life formannual

Life spanannual

Raunkiær life formtherophyte

Diet & foraging1

Parasiteindependent

Habitat & environment6

Aquaticterrestrial

Climatesubtropical

Climberself-supporting

Epiphyteterrestrial

Growth formherb

Woodinessnon-woody

05DNA & barcoding4 eDNA hits

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 Streptanthus hammittii has left across the world's sequence archives.

At a glance

eDNA detections4

06Genome at a glanceCCDB

The complete instruction manual Streptanthus hammittii 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 = 28 n = 14

Ploidypolyploid inferred

Chromosome records28–282n range28median28mode2records

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

2n 282×CCDB · ipcn-api-dl · CCDB · brass

CCDB · ipcn-api-dl — Qiu, J. 1997. In S. Boyd & T. S. Ross, Sibaropsis (Brassicaceae), a new monotypic genus from southern California. Madroño 44(1): 29–47.

CCDB · brass — Qiu

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

polyploid inferred1×PloiDB · family-scale

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

07Deep time~8.97 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 origin8.97 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

09Environmental DNA4 detections

Where the DNA of Streptanthus hammittii 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 found4

Studies independent surveys1

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

Where its DNA was found

0 of 4 detections have coordinates

Open the map0 countries0

Native grassland/white sage potrero.

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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