Calystegia affinis

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Calystegia affinis
Calystegia affinis Brest.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Solanales
Family: Convolvulaceae
Genus: Calystegia
Species:
C. affinis
Binomial name
Calystegia affinis
Synonyms [1]
  • Convolvulus affinis (Endl.) Maiden nom. illeg.

Calystegia affinis is a critically endangered species of climbing or creeping vine in the plant family Convolvulaceae. [2] It is endemic to Lord Howe Island and Norfolk Island. [2] In 2003 only about 45 mature plants were known, with about 40 of those on Norfolk Island. [3] [4]

Etymology

The genus name, Calystegia is derived from the Greek: kalux, "cup", and stegos, "a covering", meaning "a covering cup" and refers to the bracteoles enclosing the calyx. The specific epithet, affinis, is Latin for 'neighbouring', [5] which was possibly chosen by Endlicher on the basis of his comment that the species was closely allied to Calystegia marginata . [6]

Description

Calystegia affinis is a thin-stemmed plant in the genus Calystegia which climbs by twining. It has sparse alternate, arrow-headed leaves about 6 cm x 5 cm. [2] The flowers are axillary, [7] solitary, pink with five [7] cream longitudinal bands and are funnel-shaped. [2] They have large persistent bracteoles enclosing the calyx which has five sepals and five petals. [7] The fruit is a papery capsule [2] which splits longitudinally into four valves. [7] The plant is thought to reproduce both clonally and by seed. [2]

Taxonomy

Calystegia affinis was first described by Endlicher in 1833. [1] [6] In 1904, Joseph Maiden renamed it Convolvulus affinis, [8] but this is considered an illegal name by the Commonwealth Heads of Australian Herbaria. [9] The other synonyms [1] (given above) are illegal names, with the species concept having been refined by P.S. Green in 1994 in Flora of Australia. [10]

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References

  1. 1 2 3 4 "Convolvulaceae Calystegia affinis Endl". The International Plant Name Index. Retrieved 1 April 2024.
  2. 1 2 3 4 5 6 "NSW Office of Heritage and Environment, Save our Species: Calystegia affinis" . Retrieved 2018-03-16.
  3. "Calystegia affinis (a twining plant) - endangered species listing".
  4. Coyne, Peter. Norfolk Island's Fascinating Flora. Petaurus Press, 2011, p. 61
  5. Stearn, W.T. (1992) 'Botanical Latin : history, grammar, syntax, terminology and vocabulary. (p. 265)' (Portland, OR. Timber Press)
  6. 1 2 Endlicher, S. (1833) "Prodromus Florae Norfolkicae: 51" . Retrieved 24 April 2018.
  7. 1 2 3 4 "PlantNET: Calystegia., National Herbarium of NSW, Royal Botanic Gardens, Sydney Australia" . Retrieved 25 April 2018.
  8. Maiden, J.H. (1904), The Flora of Norfolk Island. Part i. Proceedings of the Linnean Society of New South Wales 28(4): 711
  9. "Convolvulaceae Calystegia affinis Endl". Australian Plant Name Index (APNI). Retrieved 1 April 2024.
  10. Green, P.S. in Wilson, A.J.G. (ed.) (1994), Norfolk Island & Lord Howe Island. Flora of Australia 49: 308–309, Fig. 82