Overview

Distribution

Range Description

Myosotis welwitschii is endemic to Morocco and the Iberian Peninsula (Portugal and Spain). Its distribution covers the southwest of the Iberian Peninsula and the northwest of Morocco.
In the Mediterranean region, the species' extent of occurrence covers over 20,000 km², and it is present in more than 20 locations.
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Range Description

Myosotis debilis is endemic to the Mediterranean basin. It is found in Portugal, Spain, Morocco and Algeria.
In the Mediterranean region, its extent of occurrence covers over 30,000 km², and it is present at more than 20 locations.
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Distribution: Temperate and subtropical Europe, Asia, N. Africa, N. America.
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N. Africa, Europe, Himalaya (Kashmir to Nepal), Siberia, N. America.
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Physical Description

Morphology

Description

Perennial, erect to suberect herb up to 50 cm tall. Stem generally solitary flaccid branched, with ascending branches, sparsely hairy with short appressed hairs Middle lower cauline leaves similar but larger, uppermost ones gradually reduced size. Inflorescence ebracteate, in flower scorpiod and compact, later elongating a lax, bearing flowers at regular intervals of 5-12 mm. Pedicels short in flower longer than calyx length, becoming ± horizontal and up to 10 mm in fruit. c. 2 mm long, c. ½ divided into ± obtuse lobes, up to 4 mm In fruit, sparsely with appressed hairs. Corolla blue; tube about calyx length, limb ± 3.5mm lobes ± ovate, spreading. Style shorter than calyx. Nutlets ovate; 1.5 x 1 mm, shiny, straw brown with a narrow margin, areola 0.5 mm broad.
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Elevation Range

4200-4600 m
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Description

Herbs perennial, with dense fibrous adventitious roots. Stems unbranched, sometimes branched, 15-50(-70) cm tall, sparsely strigose. Lower stem leaves petiolate, oblong to oblanceolate, 2-3 cm × 3-8 mm, sparsely strigose, base attenuate, margin entire, apex obtuse; upper stem leaves sessile, oblanceolate to linear-lanceolate, 3-7 cm × 5-13 mm. Inflorescences elongated after anthesis, to 10-20 cm in fruit, ebracteate, or lower several flowers from axils of linear bracts. Pedicel divaricate, 6-8 mm in fruit, usually longer than calyx. Calyx campanulate, cuneate at base, 5-lobed nearly to middle, ca. 2 mm, to 3-4 mm in fruit; lobes triangular, stiff, sparsely strigose outside, apex obtuse. Corolla light blue, 2-3 mm; tube ca. as long as calyx; throat yellow, with 5 appendages; limb 3-4 mm wide; lobes divaricate, ovate, ca. 1.5 mm. Anthers elliptic, ca. 0.6 mm, upper appendages rounded, ca. 3 × as long as anthers. Nutlets dark brown, ovoid, 1.5-2 mm, smooth, narrowly marginate above, apex obtuse. 2n = 22, 44, 48, 86, 88.
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Diagnostic Description

Synonym

Myosotis lingulata Lehmann; M. scorpioides Linnaeus subsp. caespitosa (C. F. Schultz) Hermann; M. uliginosa Schrader.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
It is an annual herbaceous plant (Therophyte) that inhabits the edges of streams and permanent pools of plains and low and medium altitude mountains. Flowering occurs during spring and summer.

Systems
  • Terrestrial
  • Freshwater
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Habitat and Ecology

Habitat and Ecology
It is an annual herbaceous plant (Therophyte) that inhabits temporary pools and marshes of plains and low mountains. It is found in wet meadows, banks of rivers and streams, on sandy, not calcareous, soil. Flowering occurs during spring and summer.

Systems
  • Terrestrial
  • Freshwater
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Habitat & Distribution

Stream banks, moist places, slopes. Gansu, Hebei, Heilongjiang, Jilin, Liaoning, Sichuan, Xinjiang, Yunnan [N Africa, temperate and subtropical Asia, Europe, North America].
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Life History and Behavior

Cyclicity

Flower/Fruit

Fl. Per.: June-July.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Myosotis debilis

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


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Statistics of barcoding coverage: Myosotis debilis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
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Barcode data: Myosotis sicula

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


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Statistics of barcoding coverage: Myosotis sicula

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
2010

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

Reviewer/s
Hugot, L., Bagella, S., Muller, S.D. & Temple, H. (IUCN Species Programme)

Contributor/s

Justification
Myosotis welwitschii has a fairly restricted distribution, but it is known from many sites, the populations appear to be stable, and it is not believed to approach the criteria for listing in a threatened category. It is therefore listed as Least Concern.
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IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

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

Reviewer/s
Hugot, L., Bagella, S., Muller, S.D., Garcia Murillo, P. & Temple, H. (IUCN Species Programme)

Contributor/s

Justification
Myosotis debilis has a fairly restricted distribution, but it occurs at many known sites, the populations are stable in most parts of its range, and it is not believed to approach the criteria for listing in threatened category. It is therefore listed as Least Concern.
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Population

Population
The species is fairly common in the Mediterranean region and the populations appear to be stable. In Morocco, it is present in at least ten locations in the northwest (Tanger, western and central Rif and Loukkos). In Portugal, it is quite common in the northwest; and it is found at nine sites in the south of Spain.

Population Trend
Stable
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Population

Population
The species is fairly common on Mediterranean level, but the North African populations are confined and their trend remains unknown.
In Morocco, the species is classified as very rare, known in only five locations distributed between the Rif (Tangérois, Issaguène valley and Oued Laou) and northern Atlantic Morocco (Chaouia-Benslimane and Mamora). In Algeria, it is also quite rare along the coastal strip of the Tell Atlas and very rare in Tiaret. In Portugal, it is fairly common and present in all provinces and in Spain, it is present in 18 provinces in the west and centre of the country. The populations in the Iberian Peninsula are stable.

Population Trend
Stable
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Threats

Major Threats
Habitat drainage, urbanization and agricultural usage are the main threats to this species.
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Major Threats
Habitat drainage for agricultural purposes, urbanization, and infrastructure development, such as the construction of roads, are the main threats to this species.
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Management

Conservation Actions

Conservation Actions
There are no conservation measures in place. Monitoring of the existing sites is recommended.
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Conservation Actions

Conservation Actions
Some populations in the Iberian peninsula are included in protected areas. There are no further conservation measures in place. For North Africa, it is recommended to monitor the existing sites and search for new ones and to study the size and dynamics of the populations.
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Notes

Comments

Found in moist places from 2100-2400 m. In Europe sometimes consider as Myosotis laxa Lehm. subsp. caespitosa (C.F. Schultz) Nordh.
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