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hornwort
hornwort (ˈhɔːnwɜːt) [f. horn n.1 + wort, after Gr. κερατόϕυλλον, i.e. horn-leaf: from the appearance of the branched stem.] A book-name of Ceratophyllum demersum, an aquatic plant with dense whorls of finely-divided leaves; also called horned pondweed.1805 J. Galpine Brit. Bot. (1806) 399. 1857 Hen...
Oxford English Dictionary
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Hornwort
In either case, the protonema is a transitory stage in the life of a hornwort. When the gametophyte has grown to its adult size, it produces the sex organs of the hornwort.
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Casterlorum
Description
Casterlorum was interpreted a hornwort by Gregory Retallack. Ordovician plants
Hornwort genera
Prehistoric plant genera
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Mesoceros
Species:
Mesoceros mesophoros
Mesoceros porcatus
References
Hornwort genera
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Ceratophyllum
(rigid/common hornwort) – cosmopolitan
Ceratophyllum echinatum A.Gray (spiny hornwort) – North America
Ceratophyllum muricatum Cham. (prickly hornwort) – Near-cosmopolitan
Ceratophyllum platyacanthum Cham. – Europe and Asia
Ceratophyllum submersum L.
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Ceratophyllum echinatum
Ceratophyllum echinatum, known as prickly hornwort, spiny hornwort, or spiny coontail, is an aquatic, perennial plant found in North America. Spiny hornwort can be found in ponds and lakes, principally in eastern North America. It is the only species of its genus endemic to North America.
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Phaeoceros carolinianus
Phaeoceros carolinianus is a cosmopolitan species of hornwort. Often seen near streams or moist situations.
References
Hornworts
Flora of Australia
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Notothylas breutelii
Notothylas breutelii, or Breutel's notothylas, is a species of hornwort in the family Notothyladaceae.
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Ceratophyllum demersum
Ceratophyllum demersum, commonly known as hornwort, rigid hornwort, coontail, or coon's tail, is a species of Ceratophyllum. Invasive status
Hornwort is a declared weed under the Tasmanian Weed Management Act 1999 in Tasmania, Australia, and is classed as an unwanted organism
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Anthoceros agrestis
Anthoceros agrestis, commonly called field hornwort, is a bryophyte of the genus Anthoceros. It has complicated taxonomies. Distribution and habitat
This hornwort has a circum-boreal distribution across temperate Europe and North America.
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Phaeoceros laevis
Phaeoceros laevis, the smooth hornwort, is a species of hornwort of the genus Phaeoceros.
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Anthoceros neesii
Anthoceros neesii is a species of hornwort in the Anthocerotaceae family. It is found in Austria, the Czech Republic, Germany, and Poland.
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Anthocerotaceae
References
External links
Hornworts
Hornwort families
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Leiosporoceros
Leiosporoceros dussii is the only species in the hornwort genus Leiosporoceros. The Ordovician fossil hornwort Casterlorum has been assigned to this family as well.
References
Hornwort genera
Monotypic bryophyte genera
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