|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.[1] It is endemic to Lord Howe Island and Norfolk Island.[1] In 2003 only about 45 mature plants were known, with about 40 of those on Norfolk Island.[2][3]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',[6] which was possibly chosen by Endlicher on the basis of his comment that the species was closely allied to Calystegia marginata.[7]
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.[1] The flowers are axillary,[9] solitary, pink with five[9] cream longitudinal bands and are funnel-shaped.[1] They have large persistent bracteoles enclosing the calyx which has five sepals and five petals.[9] The fruit is a papery capsule[1] which splits longitudinally into four valves.[9] The plant is thought to reproduce both clonally and by seed.[1]Taxonomy
Calystegia affinis was first described by Endlicher in 1833.[16][7] In 1904, Joseph Maiden renamed it Convolvulus affinis,[18] but this is considered an illegal name by the Commonwealth Heads of Australian Herbaria.[16] The other synonyms[16] (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.[21]References
1. ^1 2 3 4 5 {{cite web |url= http://www.environment.nsw.gov.au/determinations/CalystegiaAffinisATwiningPlantEndSpListing.htm |title= NSW Office of Heritage and Environment, Save our Species: Calystegia affinis|accessdate=2018-03-16}}
2. ^{{cite web|title=Calystegia affinis (a twining plant) - endangered species listing|url=http://www.environment.nsw.gov.au/determinations/CalystegiaAffinisATwiningPlantEndSpListing.htm}}
3. ^Coyne, Peter. Norfolk Island's Fascinating Flora. Petaurus Press, 2011, p. 61
4. ^1 2 3 {{cite web|url=http://www.ipni.org/ipni/idPlantNameSearch.do?id=265641-1|title=Convolvulaceae Calystegia affinis Endl., The International Plant Name Index|accessdate=24 April 2018}}
5. ^1 2 Endlicher, S. (1833) {{cite web|url=https://biodiversitylibrary.org/page/6140275|title=Prodromus Florae Norfolkicae: 51.|accessdate=24 April 2018}}
6. ^1 Maiden, J.H. (1904), The Flora of Norfolk Island. Part i. Proceedings of the Linnean Society of New South Wales 28(4): 711
7. ^1 Green, P.S. in Wilson, A.J.G. (ed.) (1994), Norfolk Island & Lord Howe Island. Flora of Australia 49: 308-309, Fig. 82
8. ^1 2 3 4 {{cite web|url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=gn&name=Calystegia|title=PlantNET: Calystegia., National Herbarium of NSW, Royal Botanic Gardens, Sydney Australia|accessdate=25 April 2018}}
9. ^1 Stearn, W.T. (1992) 'Botanical Latin : history, grammar, syntax, terminology and vocabulary. (p. 265)' (Portland, OR. Timber Press)