Belongs within: Convolvuloideae.
Convolvulus is a cosmopolitan genus of tufted or twining herbs with flowers bearing one style, two stigmas and unlobed ovaries (Hickman 1993). Members of this genus have historically been divided between the genera Convolvulus and Calystegia but phylogenetic analysis indicates that the latter is nested within the former (Stefanović et al. 2003). Convolvulus arvensis, bindweed, is a species with hastate leaves and white or pinkish flowers, native to Eurasia but now widespread as an invasive weed (Hickman 1993).
<==Convolvulus Linnaeus 1753A61 [incl. Calystegia Br. 1810SAO03, A61]
|--C. althaeoidesPT98
|--C. angustissimusKM08
|--C. argillicolaCV06
|--C. arvensisSAO03
|--‘Calystegia’ atriplicifoliaH93
| |--C. a. ssp. atriplicifoliaH93
| `--C. a. ssp. buttensis [incl. Convolvulus nyctagineus]H93
|--C. auricomusPP07
|--C. cantabrica Linnaeus 1753PL04
|--C. caput-medusaeST98
|--C. chilensisST98
|--C. cneorumST98
|--C. collinus [=Calystegia collina, Co. malacophyllus ssp. collinus]H93
| |--C. c. ssp. collinusH93
| |--‘Calystegia collina’ ssp. oxyphyllaH93
| |--‘Calystegia collina’ ssp. tridactylosa [=Convolvulus tridactylosus]H93
| `--‘Calystegia collina’ ssp. venustaH93
|--C. elegantissimusPT98
|--C. erubescensC06
|--C. fracto-saxosa Petrie 1913A61
|--C. glaucifoliusC55a
|--C. incanusC01
|--C. lanuginosusC55a
|--C. lineatusC55a
|--C. longipes [=Calystegia longipes; incl. Co. linearilobus]H93
|--C. macrostegius [=Calystegia macrostegia, C. occidentalis var. macrostegius]H93
| |--C. m. ssp. macrostegiaH93
| |--‘Calystegia macrostegia’ ssp. amplissimaH93
| |--‘Calystegia macrostegia’ ssp. arida [=Convolvulus aridus]H93
| |--‘Calystegia macrostegia’ ssp. cyclostegia [=Convolvulus cyclostegius]H93
| |--‘Calystegia macrostegia’ ssp. intermedia (see below for synonymy)H93
| `--‘Calystegia macrostegia’ ssp. tenuifolia [=Convolvulus aridus ssp. tenuifolius]H93
|--C. malacophyllus [=Calystegia malacophylla]H93
| |--C. m. ssp. malacophyllus [incl. Calystegia malacophyllus var. berryi]H93
| `--C. m. ssp. pedicellatus [=Calystegia malacophylla ssp. pedicellata]H93
|--C. marginatusC06 [=Calystegia marginata Br. 1810A61]
|--C. minorPT01
|--C. nodiflorus Desr. in Lam. 1792 [=Jacquemontia nodiflora (Desr.) Don 1838]L95
|--C. occidentalis [=Calystegia occidentalis]H93
| |--C. o. ssp. occidentalis [incl. C. fruticetorum, C. polymorphus]H93
| `--‘Calystegia’ o. ssp. fulcrata [=Convolvulus fulcratus; incl. Co. deltoideus]H93
|--C. oleifoliusPT98
|--‘Calystegia’ peirsoniiH93
|--C. platanifoliusC55b
|--C. prostratusPP07
|--‘Calystegia’ purpurataH93
| |--C. p. ssp. purpurata [=Convolvulus occidentalis var. purpuratus; incl. Co. occidentalis var. solanensis]H93
| `--C. p. ssp. saxicola [=Convolvulus occidentalis var. saxicola]H93
|--C. sabatiusST98
| |--C. s. ssp. sabatiusST98
| `--C. s. ssp. mauritanicusST98
|--C. sepium Linnaeus 1753 [=Calystegia sepium (Linnaeus) Br. 1810]A61
| |--C. s. ssp. sepiumH93
| |--‘Calystegia’ s. ssp. binghamiae [=Convolvulus binghamiae; incl. Co. sepium var. dumetorum]H93
| `--‘Calystegia’ s. ssp. limnophilaH93 (see below for synonymy)
|--C. siculusPT98
|--C. simulansH93
|--C. sindicus Stock in Hook 1852 [incl. C. brachyphyllus Boiss. 1856]P06
|--C. soldanella Linnaeus 1753A61 [=Calystegia soldanella (Linnaeus) Br. 1810A61; incl. Ca. reniformisC55b]
|--‘Calystegia’ stebbinsiiH93
|--C. subacaulis [=Calystegia subacaulis]H93
| |--C. s. ssp. subacaulisH93
| `--‘Calystegia’ s. ssp. episcopalisH93
|--C. supinusD17
| |--C. s. var. supinusD17
| `--C. s. var. leucotrichusD17
|--‘Calystegia’ sylvaticaH59
|--C. tuguriorum Forster 1786 (see below for synonymy)A61
|--C. undulatusC55a
`--C. verecundus Allan 1961A61
‘Calystegia macrostegia’ ssp. intermedia [=Convolvulus aridus ssp. intermedius; incl. Co. aridus ssp. longilobus]H93
‘Calystegia’ sepium ssp. limnophilaH93 [=Convolvulus limnophilusH93; incl. Co. repens L. 1753L95, Co. sepium var. repensH93]
Convolvulus tuguriorum Forster 1786 [=Calystegia tuguriorum (Forster) Br. ex Hooker 1854; incl. Ca. truncatella Colenso 1889]A61
*Type species of generic name indicated
References
[A61] Allan, H. H. 1961. Flora of New Zealand vol. 1. Indigenous Tracheophyta: Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledones. R. E. Owen, Government Printer: Wellington (New Zealand).
[C55a] Candolle, A. de. 1855a. Géographie Botanique Raisonée: Ou exposition des faits principaux et des lois concernant la distribution géographique des plantes de l’époque actuelle vol. 1. Librairie de Victor Masson: Paris.
[C55b] Candolle, A. de. 1855b. Géographie Botanique Raisonée: Ou exposition des faits principaux et des lois concernant la distribution géographique des plantes de l’époque actuelle vol. 2. Librairie de Victor Masson: Paris.
[C06] Cheeseman, T. F. 1906. Manual of the New Zealand Flora. John Mackay, Government Printer: Wellington.
[C01] Cockerell, T. D. A. 1901. Contributions from the New Mexico Biological Station.—X. Observations on bees collected at Las Vegas, New Mexico, and in the adjacent mountains. Annals and Magazine of Natural History, series 7, 7: 125–131.
[CV06] Craven, P., & P. Vorster. 2006. Patterns of plant diversity and endemism in Namibia. Bothalia 36 (2): 175–189.
[D17] Diels, L. 1917. Beiträge zur Flora der Zentral-Sahara und ihrer Pflanzengeographie. Nach der Sammelausbeute des Freiherrn Hans Geyr von Schweppenburg. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 54 (Beiblatt 120): 51–155.
[H59] Healy, A. J. 1959. Contributions to a knowledge of the adventive flora of New Zealand, no. 7. Transactions of the Royal Society of New Zealand 86 (1): 113–118.
[H93] Hickman, J. C. (ed.) 1993. The Jepson Manual: Higher Plants of California. University of California Press: Berkeley (California).
[KM08] Keighery, G. J., & W. Muir. 2008. Vegetation and vascular flora of Faure Island, Shark Bay, Western Australia. Records of the Western Australian Museum Supplement 75: 11–19.
[L95] Liogier, H. A. 1995. Descriptive Flora of Puerto Rico and Adjacent Islands: Spermatophyta-Dicotyledoneae vol. 4. Melastomataceae to Lentibulariaceae. Editorial de la Universidad de Puerto Rico.
[PP07] Pandey, R. P., & P. M. Padhye. 2007. Studies on phytodiversity of Arid Machia Safari Park-Kailana in Jodhpur (Rajasthan). Bulletin of the Botanical Survey of India 49: 15–78.
[PT98] Panitsa, M., & D. Tzanoudakis. 1998. Contribution to the study of the Greek flora: flora and vegetation of the E Aegean islands Agathonisi and Pharmakonisi. Willdenowia 28: 95–116.
[P06] Parmar, P. J. 2006. Additions to the flora of Gujarat from Mehsana and Kutch districts (N. Gujarat). Bulletin of the Botanical Survey of India 48: 191–196.
[PT01] Pemberton, L. M. S., S.-L. Tsai, P. H. Lovell & P. J. Harris. 2001. Epidermal patterning in seedling roots of eudicotyledons. Annals of Botany 87: 649–654.
[PL04] Pohl, G., & I. Lenski. 2004. Zur Verbreitung und Vergesellschaftung von Pennisetum orientale Rich. in Nordeuböa (Griechenland) (Poaceae, Paniceae). Senckenbergiana Biologica 83 (2): 209–223.
[ST98] Schimming, T., B. Tofern, P. Mann, A. Richter, K. Jenett-Siems, B. Dräger, N. Asano, M. P. Gupta, M. D. Correa & E. Eich. 1998. Distribution and taxonomic significance of calystegines in the Convolvulaceae. Phytochemistry 49: 1989–1995.
[SAO03] Stefanović, S., D. F. Austin & R. G. Olmstead. 2003. Classification of Covolvulaceae: a phylogenetic approach. Systematic Botany 28 (4): 791–806.