nandivriksha :

Taxonomical Classification

Kingdom: Plantae - Plants
Subkingdom: Streptophyta
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Family: Apocynaceae
Genus: Tabernaemontana
Species: Tabernaemontana divaricata

Allied species:

Taberna discolor (Sw.) Miers

Tabernaemontana citrifolia Lunan

Tabernaemontana coronaria (Jacq.) Willd.

Tabernaemontana discolor Sw.

Tabernaemontana flabelliformis (Tsiang) P.T.Li

Tabernaemontana gratissima Lindl.

Tabernaemontana indica Willd. ex Roem. & Schult. [Illegitimate]

Tabernaemontana lurida Van Heurck & Müll.Arg.

Tabernaemontana recurva Roxb. ex Lindl.

Tabernaemontana siamensis Warb. ex Pit.

Testudipes recurva (Roxb. ex Lindl.) Markgr.

Vinca alba Noronha[

VERNACULAR NAMES

Sanskrit: nandivrksah
English: Indian rosebay Crape jasmine, Moonbeam, Carnation of India
Hindi: Chandni चांदनी , Tagar तगर, Tagari तगरी
Urdu: Chaandni
Telugu: gandhitagarapu
Bengali: tagar
Marathi: Ananta, Tagar
Konkani: अनंत ananta
Gujarathi: Sagar
Tamil: நந்தியார்வட்டை Nandiar vattai
Malayalam: nantyarvattam
Kannada: ನಂದಿಬಟ್ಟಲು Nandi Battalu
Spanish: Rosa de hielo
Chinese: 狗牙花 gou ya hua
Sinhalese: wathusudda වතුසුද්ද

Varities:

The size of the flowers also varies. It can be from 2.5 to 5 cm across. The white petals are five in number with a slight twist towards the left (idampiri in Malayalam), making the flower appear like a pinwheel. There is also a variety with the twist towards the right (valampiri), but I think it is rare.

There is also a variety with fragrant double-flower. The normal variety is not fragrant.