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Overview

Brief Summary

Moss pygmyweed is a very small plant. In fact, it is the smallest flowering land plant in the Netherlands. It looks a lot like a moss, which explains the Dutch name 'moss flower'. The young succulent leaves begin green, but turn orange and then red as they age. You generally only notice the plant when it's red. Just like wall-pepper, if parts of the plant break off, they easily take root elsewhere.
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Distribution

Range Description

Crassula tillaea is a Mediterraneo-Atlantic species. Its world distribution includes the Mediterranean, Europe and Macaronesia. In the Mediterranean region it is present in Portugal, Spain, Balearic Islands, France, Corsica, Italy, Sardinia, Sicily, Malta, Greece, Crete, Karpathos, East Aegean Islands, Bulgaria, Turkey, Morocco, Algeria, Tunisia and Libya. Its extent of occurrence exceeds 5,000,000 km², with several locations. In the Arabian Peninsula this species is known only from Asir in Saudi Arabia (Chaudhary 2001).
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National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Localities documented in Tropicos sources

Tillaea muscosa Gay:
Chile (South America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Localities documented in Tropicos sources

Crassula connata var. connata :
Bolivia (South America)
Chile (South America)
Ecuador (South America)
United States (North America)
Peru (South America)
Colombia (South America)
Argentina (South America)
Guatemala (Mesoamerica)
Mexico (Mesoamerica)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Localities documented in Tropicos sources

Tillaea erecta Hook. & Arn.:
Chile (South America)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Localities documented in Tropicos sources

Crassula tillaea Lest.-Garl.:
United States (North America)
Chile (South America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Localities documented in Tropicos sources

Tillaea muscosa L.:
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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National Distribution

Canada

Origin: Exotic

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species typically grows in seasonally inundated or permanently moist sandy or gravel habitats, often in areas which are extensively used by people, such as trackways, un-metalled roads and open areas in heathland.

Systems
  • Terrestrial
  • Freshwater
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Crassula tillaea

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Crassula tillaea

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2013

Assessor/s
Lansdown, R.V., Rhazi, L., Grillas, P., Rhazi, M. & Flanagan, D.

Reviewer/s
García, N. & Tognelli, M.

Contributor/s
Knees, S.G., Patzelt, A., Neale, S. & Williams, L.

Justification
This species is widespread and is not subject to any known threats. In some parts of its range it appears to be increasing. It is therefore listed as Least Concern.
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NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNA - Not Applicable

United States

Rounded National Status Rank: NNA - Not Applicable

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: N2 - Imperiled

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: TNR - Not Yet Ranked

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Population

Population
The species is very widespread in the Mediterranean region, and it appears to be increasing in the UK (Preston et al. 2002).

Population Trend
Increasing
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Threats

Major Threats
There are no known significant past, ongoing or future threats to this species.
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Management

Conservation Actions

Conservation Actions
There are no conservation measures in place or needed.
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Wikipedia

Crassula tillaea

Crassula tillaea is a succulent plant known by its common names mossy stonecrop and moss pygmyweed. It is a small fleshy plant growing only a few centimeters in height. It is green when new and gradually turns orange and then deep red when mature. It has tiny triangular pointed leaves only a few millimeters long. A tiny flower or pair of flowers grows between each oppositely-arranged pair of leaves; the flowers are about two millimeters in length and width. The fruit is a minute follicle containing one or two seeds. This plant is native to Eurasia, particularly the Mediterranean Basin, but is known in other regions as an introduced species.

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