by Stephen Mifsud
   24 Jun 2024      ()
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Symphyotrichum squamatum   (Narrow-leaved Aster)

Symphyotrichum squamatum  (ASTERACEAE.) 
Images for this profile are taken from the Maltese Islands after year 2000.

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General Information Species Images
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Detailed species profile
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Profile Date Oct-2003 (taxon update: Oct-2003)
Citation for this page Mifsud, S. (2022). Symphyotrichum squamatum - datasheet created on Oct-2003. Retrieved from on 24-Jun-2024

Nomenclature and Basic Information

Species name :

Symphyotrichum squamatum(Spreng.) G.L.Nesom
Published in Bot. Jahrb. 29: 19 (1900)

Synonyms :
(basionym or principal syn.)

Symphyotrichum subulatum var. squamatum (Spreng.) S.D.Sundb.
Synonym that was used for long in Malta: Aster squamatus Hieron.
Full list of synonyms : [Euro+Med] [PlantList] [IPNI] [POWO] [Catalogue of Life] []

Plant Family :

Asteraceae Bercht. & J.Presl (=Compositae) (The Daisy or Sunflower Family)
123 species from the Asteraceae family are recorded from the Maltese Islands.

English name(s) :

Narrow-leaved Aster, Annual Saltmarsh Aster, Swamp Aster

Maltese name(s) :

Settembrina salvaġġa

Status for Malta :

Invasive Alien. Species that was introduced in Malta any time after year 1492 (Columbus' discovery of the New World), and spreads rapidly to form large invasive populations to the detriment of native flora or ecosystems.

Frequency :

Very Common     Common    Frequent    Scarce     Rare    Very rare    Extinct

Growth form :

Raunkiaer lifeform [info]: THEROPHYTE ( annual plants, herbaceous )
Germination [info]: Dicotyledon

Legal Protection :

Not legally protected till the last update of this website (2/Mar/2022)

Red List (1989) :

Not listed in the Red Data Book of the Maltese Islands

Flowering Time :

September – November

Colour of Flowers:



Not particularly toxic

Name Derivation :

Symphyotrichum: Derivation unknown. ( )

Planting in rural areas :

Can be planted in rural areas according to ERA Guidelines

Remarks :

A species which had undergone several taxonomic changes were some classification prefer the taxon Symphyotrichum subulatum var. squamatum . At present S. squamatum is used for this species until there is more stability about its name.

Description, Habitat and Distribution
Habitat in Europe: Near the sea, usually on saline soil
Preferred habitat in Malta: Valley beds, roadsides, disturbed wetlands, disturbed weedy places, also in urban areas and margins of irrigated fields
Botanical Description: Annual or biennial 30-100 cm. Stem erect or ascending, glabrous. Leaves mostly linear or linear-lanceolate, entire. Capitula in symmetrical panicles. Involucral bracts in 3 rows, oblong to oblanceolate, tapered near the purplish, serrulate apex to an acute or mucronate point, appressed, the longest 5-6 mm. Ligules violet-blue, about as long as the pappus, more numerous than the tubular florets.
Chromosome number: 2n=20
Distributional range: Widely naturalized in S.W. Europe recently also in C. & E. Mediterranean region, and still spreading
Native region outside Europe: (Central and South America; widely naturalized elsewhere.)

Distributional map in Europe
and the Mediterranean region (2018):
Occurrences in Europe.
(from Flora Europaea pre year 1993):
Introduced in  the Azores, the Balaeric Islands, Corse, Crete, France (incl. Monaco and Channel Islands but excluding Corse), Greece, Spain (incl. Andorra but excl. the Balaerics), Italy (excl. Sicily and Sardignia), ex-Jugoslavia, Portugal, Sardinia
Occurrences in Europe and the Mediterranean region.
(from Euro+Med Checklist, 2019)
  Country codes  
[Ab(A) AE(G) nAg Al nAz(G J L M P S T) aBe nBl(I M N) nBu Ca(C F G L P T) aCa(H) Cg nCo nCr Ct nCy nEg nGa(F M) nGr nHs(G S) nIJ nIr nIt Jo nLe nLi nLS nLu nMa nMd(M P) nSa Si(M) nSi(S) Sl nSn nSy Tn nTu(A) Tu(E)]

Links & Further literature (0 papers)

Google Web

Google Images

Google Scholar

Research Gate




Med Checklist

Cat. of Life



World Flora Online

Plants of the World Online

Vienna Virt. Herb.

RBGE Herbarium

KEW Herbarium




Kindly Email if there are papers and publications about local studies or information about this species to be included in the list above.

Species Images (51 images)
   Symphyotrichum squamatum   -   Image Code: SYTSQ-0.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-1.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-2.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-3.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-4.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-5.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-6.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-7.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-8.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-9.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-10.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-11.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-12.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-13.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-14.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-15.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-16.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-17.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-18.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-19.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-20.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-21.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-22.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-23.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-24.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-25.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-26.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-27.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-28.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-29.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-30.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-31.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-32.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-33.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-34.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-35.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-36.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-37.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-38.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-39.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-40.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-41.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-42.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-43.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-44.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-45.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-46.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-47.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-48.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-49.
   Symphyotrichum squamatum   -   Image Code: SYTSQ-50.

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