Callitriche hermaphroditica

Callitriche hermaphroditica
Conservation status
Secure  (NatureServe) [1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Plantaginaceae
Genus:	Callitriche
Species:	C. hermaphroditica
Binomial name
Callitriche hermaphroditica L.
Subspecies [2]
C. h. subsp. exalata C. h. subsp. hermaphroditica C. h. subsp. macrocarpa
Synonyms [2]
Callitriche autumnalis

Callitriche hermaphroditica (vernacular name: autumnal water-starwort ^[1] ) is a species of flowering plant belonging to the family Plantaginaceae.

Its native range is Subarctic and Temperate Northern Hemisphere. ^[2]

Taxonomy

Callitriche hermaphroditica was given its scientific name in 1755 by Carl Linnaeus. It is classified in the genus Callitriche within the family Plantaginaceae and has three accepted subspecies. ^[2]

• Callitriche hermaphroditica subsp. exalata
  This subspecies is only found in northwestern Russia. ^[3]
• Callitriche hermaphroditica subsp. hermaphroditica
  This subspecies is the most widespread and is native to North America, Europe, and Asia. ^[4]
• Callitriche hermaphroditica subsp. macrocarpa
  This subspecies is widely, but not continuously distributed being found in Alaska, Oregon, Greenland, Iceland, the British Isles, Scandenavia, and the Himalayas. ^[5]

Callitriche hermaphroditica has 19 synonyms of the species or one of its three subspecies. ^{[2] [3] [4] [5]}

Table of Synonyms

Name	Year	Rank	Synonym of:	Notes
Callitriche angustifoliaGilib.	1792	species	subsp. hermaphroditica	= het., opus utique oppr.
Callitriche aquatica subsp. autumnalisBonnier	1921	subspecies	C. hermaphroditica	≡ hom.
Callitriche autumnalisL.	1755	species	C. hermaphroditica	≡ hom., nom. illeg.
Callitriche autumnalis var. linearis(Pursh) A.Gray	1862	variety	subsp. hermaphroditica	= het.
Callitriche autumnalis f. linneiKütz.	1831	form	subsp. hermaphroditica	= het.
Callitriche autumnalis f. macrocarpaHegelm.	1867	form	subsp. macrocarpa	≡ hom.
Callitriche confervoidesThuill. ex Link	1820	species	subsp. hermaphroditica	= het.
Callitriche decussataLink	1820	species	subsp. hermaphroditica	= het.
Callitriche euautumnalisSyme	1868	species	subsp. hermaphroditica	= het.
Callitriche exalata(Tzvelev) Tzvelev	2000	species	subsp. exalata	≡ hom.
Callitriche foliosaRaf.	1808	species	subsp. hermaphroditica	= het., nom. utique rej.
Callitriche glomerataThuill. ex Link	1820	species	subsp. hermaphroditica	= het.
Callitriche linearisPursh	1813	species	subsp. hermaphroditica	= het.
Callitriche sessilisDC.	1805	species	subsp. hermaphroditica	= het.
Callitriche sessilis var. autumnalisMérat	1813	variety	C. hermaphroditica	≡ hom., nom. superfl.
Callitriche sessilis var. confervoidesMérat	1812	variety	subsp. hermaphroditica	= het.
Callitriche stellariaRaf.	1811	species	subsp. hermaphroditica	= het.
Callitriche virensGoldb.	1817	species	subsp. hermaphroditica	= het.
Stellaria autumnalisF.H.Wigg.	1780	species	subsp. hermaphroditica	= het.
Notes: ≡ homotypic synonym; = heterotypic synonym

References

1. NatureServe (9 January 2026). "Callitriche hermaphroditica". NatureServe Explorer. Arlington, Virginia. Retrieved 16 January 2026.
2. POWO (2026). "Callitriche hermaphroditica L." Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 16 January 2026.
3. POWO (2026). "Callitriche hermaphroditica subsp. exalata Tzvelev". Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 16 January 2026.
4. POWO (2026). "Callitriche hermaphroditica subsp. hermaphroditica". Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 16 January 2026.
5. POWO (2026). "Callitriche hermaphroditica subsp. macrocarpa (Hegelm.) Lansdown". Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 16 January 2026.