Calystegia affinis

Calystegia affinis
Scientific classification
Kingdom:Plantae
Clade:Angiosperms
Clade:Eudicots
Clade:Asterids
Order:Solanales
Family:Convolvulaceae
Genus:Calystegia
Species: C. affinis
Binomial name
Calystegia affinis
Endl. [1]
Synonyms

Convolvulus affinis (Endl.) Maiden nom. illeg.

Convolvulus marginatus (R.Br.) Spreng. nom. illeg.

Calystegia marginata R.Br. (misapplication)

Calystegia affinis is a critically endangered species of climbing or creeping vine in the plant Convolvulaceae family[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.[8][6] In 1904, Joseph Maiden renamed it Convolvulus affinis,[9] but this is considered an illegal name by the Commonwealth Heads of Australian Herbaria.[8] The other synonyms[8] (given above) are illegal names, misapplications or pro-parte misapplications, with the species concept having been refined by P.S. Green in 1994 in Flora of Australia.[10]

References

  1. ↑ "Convolvulaceae Calystegia affinis Endl., The International Plant Name Index". Retrieved 24 April 2018.
  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. 1 2 3 "Convolvulaceae Calystegia affinis Endl., The International Plant Name Index". Retrieved 24 April 2018.
  9. ↑ Maiden, J.H. (1904), The Flora of Norfolk Island. Part i. Proceedings of the Linnean Society of New South Wales 28(4): 711
  10. ↑ Green, P.S. in Wilson, A.J.G. (ed.) (1994), Norfolk Island & Lord Howe Island. Flora of Australia 49: 308-309, Fig. 82


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