Polygala myrtifolia

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Polygala myrtifolia

From Wikipedia, the free encyclopedia

Polygala myrtifolia

Flowers of Polygala myrtifolia
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fabales
Family:	Polygalaceae
Genus:	Polygala
Species:	P. myrtifolia
Binomial name
*Polygala myrtifolia* L.

Polygala myrtifolia, the myrtle-leaf milkwort,^[1] is an evergreen 2–4 m tall South African shrub or small tree found along the southern and south-eastern coasts, from near Clanwilliam in the Western Cape to KwaZulu-Natal. It is a fast-growing pioneer plant, a typical fynbos component, and may be found on dunes, rocky places, along forest margins, beside streams, and in open grassland. It belongs to the milkwort family of Polygalaceae.

The thin, oval, mucronate leaves, 25–50 mm long and up to 13 mm wide, are arranged alternately and have entire margins – some forms of P. myrtifolia have thin, needle-like leaves. The attractive mauve sweetpea-like flowers, which close at night, may also be pink, crimson or white, and have a characteristic brush-like tuft protruding from the keel. For pollination an intricate piston mechanism is used.^[2] The fruit is an oval, brown, dehiscent capsule which is narrowly winged. The species is often cultivated in South African gardens.

Taxonomy

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The genus of Polygala comprises some 659 species with a wide distribution in the tropics and temperate zones.^[3]

Etymology

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Polygala is interpreted as 'much milk' since the plant was thought to stimulate milk production in European cows – myrtifolia translates as 'myrtle-shaped leaves'.

Medicinal properties

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The species is noted for its antibacterial and antifungal properties. Research conducted by the University of KwaZulu Natal found that aqueous extracts of P. myrtifolia proved effective against Candida albicans.^[4]

Environmental impact

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P. myrtifolia has become naturalised in coastal areas of California, New Zealand and Norfolk Island. In Australia, it is a significant environmental weed in coastal districts of Victoria and South Australia, and a moderately important environmental weed in New South Wales, Tasmania and Western Australia. In the 2010s, it was recently listed as a priority environmental weed in parts of Queensland.^[5]

References

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^ USDA, NRCS (n.d.). "Polygala myrtifolia". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 11 October 2015.
^ Westerkamp, C.; Weber, A. (1997-10-01). "Secondary and tertiary pollen presentation in Polygala myrtifolia and allies (Polygalaceae, South Africa)". South African Journal of Botany. 63 (5): 254–258. doi:10.1016/S0254-6299(15)30762-6.
^ "Polygala Tourn. ex L". Plants of the World Online. Royal Botanic Gardens Kew. Retrieved July 5, 2020.
^ "Polygala myrtifolia | PlantZAfrica.com". www.plantzafrica.com. Retrieved 2017-08-04.
^ "Scientific Name Polygala myrtifolia L." Weeds of Australia: Biosecurity Queensland Edition. Queensland Government. Retrieved 2019-02-21.

Taxon identifiers

Polygala myrtifolia

Wikidata: Q3007551
Wikispecies: Polygala myrtifolia
APDB: 151365
APNI: 109060
Calflora: 8704
Cal-IPC: polygala-myrtifolia
CoL: 4L7XX
eFloraSA: Polygala_myrtifolia
EoL: 483049
EPPO: POGMY
EUNIS: 178095
FloraBase: 8395
FoAO2: Polygala myrtifolia
GBIF: 3191402
GRIN: 29215
iNaturalist: 181610
IPA: 41302
IPNI: 691901-1
IRMNG: 10452498
ITIS: 507127
NCBI: 292129
NSWFlora: Polygala~myrtifolia
NZOR: 70c90a37-7389-48c5-a3f5-ac189a0d3b7f
NZPCN: 3117
Observation.org: 135211
Open Tree of Life: 995917
PalDat: Polygala_myrtifolia
PFI: 2997
Plant List: kew-2572832
PLANTS: POMY5
POWO: urn:lsid:ipni.org:names:691901-1
RHS: 20908
Tropicos: 25900647
uBio: 477876
VicFlora: fc351117-0f8f-4efb-86d2-e9b7738d1ee7
WFO: wfo-0000488587

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