Trillium scouleri

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Trillium scouleri
Status TNC G4.svg
Apparently Secure  (NatureServe) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Liliales
Family: Melanthiaceae
Genus: Trillium
Species:
T. scouleri
Binomial name
Trillium scouleri

Trillium scouleri is a species of flowering plant in the bunchflower family Melanthiaceae.

Contents

Description

In both habit and flower structure, Trillium scouleri closely resembles Trillium ovatum . To distinguish the two species, the only reliable characters are the lengths of the filaments and anthers. In absolute terms, the filaments and anthers of T. scouleri are almost always longer than the corresponding characters in T. ovatum. The minimum, average, and maximum lengths of the filaments and anthers of each species is as follows: [3]

Character length (mm)
FilamentsAnthers
MinAveMaxMinAveMax
T. scouleri56.49810.815
T. ovatum44.4556.47

The relative lengths of the filaments and anthers are also significant. In T. ovatum, the length of the filaments is equal to (or slightly less than) the length of anthers. In T. scouleri, the length of the filaments is one-half to two-thirds the length of the anthers. [4]

Taxonomy

Trillium scouleri was described by the American ecologist, botanist, and taxonomist Henry A. Gleason in 1906. [5] Gleason included the Swedish-born, American botanist Per Axel Rydberg as a co-author but cited no reference. In any case the correct name of the taxon is Trillium scouleriRydb. ex Gleason. [2]

Gleason's description is based on some notes published by the English botanist William Jackson Hooker in 1838. [6] One of the specimens examined by Hooker was evidently collected by David Douglas and John Scouler while serving on board a Hudson's Bay Company ship that sailed from London in 1824. The ship was bound for the Columbia River in what is now known as the Pacific Northwest region of North America. Presumably the specimen was collected there circa 1825, which disagrees with Gleason's claim that the type specimen of Trillium scouleri was collected in British Columbia.

For many decades, Trillium scouleriRydb. ex Gleason was assumed to be a synonym for Trillium ovatum Pursh, but more recently it was accepted as a distinct species based on unpublished molecular evidence. [1] [7] [ better source needed ]As of September 2024, Plants of the World Online considers Trillium scouleri to be a synonym for Trillium ovatum, [8] while World Flora Online accepts it as a distinct species. [9]

Related Research Articles

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<i>Trillium pusillum</i> Species of flowering plant

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Trillium hibbersonii is a species of flowering plant in the bunchflower family Melanthiaceae. The specific epithet hibbersonii honors the English Canadian surveyor John Arthur Hibberson (1881–1955) who first collected this plant in 1938 on Vancouver Island in British Columbia. Hibberson and his son propagated the trilliums, selling them to buyers in England and other European countries. In 1968, Leonard Wiley coined the Latin name Trillium hibbersonii, a name that has since been used by horticulturists without reservation.

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References

  1. 1 2 "Trillium scouleri". NatureServe Explorer. NatureServe. Retrieved 7 December 2021.
  2. 1 2 "Trillium scouleriRydb. ex Gleason". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew; Harvard University Herbaria & Libraries; Australian National Botanic Gardens . Retrieved 27 April 2024.
  3. Gleason (1906), p. 395.
  4. Gleason (1906), p. 389.
  5. Gleason (1906), p. 394.
  6. Hooker (1840), 2(10):180 (1838).
  7. Meredith et al. (2022), p. 42.
  8. "Trillium scouleriRydb. ex Gleason". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 21 September 2024.
  9. "Trillium scouleriRydb. ex Gleason". WFO Plant List. Retrieved 21 September 2024.

Bibliography