Dogbane

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The solitary bee, Hylaeus pictus, foraging on Apocynum venetum; many dogbane species are valued as nectar plants Hylaeus pictus 2.jpg
The solitary bee, Hylaeus pictus , foraging on Apocynum venetum; many dogbane species are valued as nectar plants
Milkweed - or oleander - aphid, Aphis nerii, feeds on members of the dogbane family. It accumulates the toxic compounds and, if disturbed, releases them in defence. Milkweed - or oleander - aphid, Aphis nerii.jpg
Milkweed - or oleander - aphid, Aphis nerii , feeds on members of the dogbane family. It accumulates the toxic compounds and, if disturbed, releases them in defence.

Dogbane, dog-bane , dog's bane,[ citation needed ] and other variations, some of them regional and some transient, are names for certain plants that are reputed to kill or repel dogs; "bane" originally meant "slayer", and was later applied to plants to indicate that they were poisonous to particular creatures.[ citation needed ]

Contents

History of the term

The earliest reference to such names in common English usage was in the 16th century, [1] in which they were applied to various plants in the Apocynaceae, in particular Apocynum . Some plants in the Asclepiadoideae, now a subfamily of the Apocynaceae, but until recently regarded as the separate family Asclepiadaceae, were also called dogbane even before the two families were united. It is not clear how much earlier the name had been in use in the English language, which originated about 1000 years earlier in mediaeval times. However, centuries before the appearance of the English language, Pedanius Dioscorides, in his De Materia Medica , had already described members of the Apocynaceae, such as Apocynum and Cynanchum by names equivalent to "dogbane"; Apocynum literally means "dog killer" or "dog remover", and "Cynanchum" means "dog strangler". In modern times some species of Nerium , [2] Periploca and Trachelospermum , also in the Apocynaceae, are called dogbane or variants such as "climbing dogbane".[ citation needed ]

Modern significance of the term "dogbane family"

Some modern sources restrict "dogbane" in its strict sense to the genus Apocynum, [3] but it is doubtful that any such narrow definition could be justified even if it were enforceable. More widely, when authors refer to the "dogbane family" without qualification, they almost always mean Apocynaceae. [4]

"Dogbane" as a term outside the family Apocynaceae

Common names, either informal or vernacular, are seldom definitive, let alone stable. Some poisonous or offensive plants in practically unrelated families had similar common names in the vernacular and writings of various times; for example an edition De Materia Medica, apparently of the early sixteenth century, mentions that species of Aconitum (family Ranunculaceae) were known as either "dog killer" (or murderer) or "wolf killer" ("...Sunt qui Cynoctonon: qui Lycoctonon... uocent"). [5] Again, in modern times Isocoma menziesii in the family Asteraceae is known in some regions as dogbane.[ citation needed ]

Recent aberrant application of the term

The term "dogbane", either in genuine confusion or as a deliberate sales ploy, has been applied without obvious justification to various groups of plants, such as some species of Plectranthus , a genus in the catnip subfamily Nepetoideae of the mint family Lamiaceae. None have been reported to be especially harmful to dogs or cats, but some have been said to emit repellent essential oils when bruised, discouraging pets from visiting garden beds. [6]

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Apocynaceae is a family of flowering plants that includes trees, shrubs, herbs, stem succulents, and vines, commonly known as the dogbane family, because some taxa were used as dog poison. Members of the family are native to the European, Asian, African, Australian, and American tropics or subtropics, with some temperate members. The former family Asclepiadaceae is considered a subfamily of Apocynaceae and contains 348 genera. A list of Apocynaceae genera may be found here.

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References

  1. Brown, Lesley (1993). The New shorter Oxford English dictionary on historical principles. Oxford [Eng.]: Clarendon. ISBN   978-0-19-861271-1.
  2. Hospital Physician. F & F Publications. 1979.
  3. Range Plant Handbook. U.S. Government Printing Office. 1937. pp. 246–.
  4. Glenn Keator; Margaret J. Steunenberg (2009). California Plant Families: West of the Sierran Crest and Deserts. University of California Press. pp. 28–. ISBN   978-0-520-23709-4.
  5. Pedanius Dioscorides; Marcellus Vergilius (1518). De materia medica: libri sex. Iunta. pp. 513–.
  6. "Lamiaceae".