Tabernaemontana pachysiphon Stapf, Bull. Misc. Inform. Kew 1894: 22 (1894) (syn: Conopharyngia angolensis (Stapf) Stapf ; Conopharyngia cumminsii Stapf ; Conopharyngia holstii (K.Schum.) Stapf ; Sarcopharyngia angolensis (Stapf) L.Allorge ; Tabernaemontana angolensis Stapf ; Tabernaemontana holstii K.Schum. ; Tabernaemontana pachysiphon var. cumminsii (Stapf) H.Huber ; Voacanga dichotoma K.Schum.);
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Tropical Africa: Angola, Benin, Cameroon, Central African Repu, Gabon, Ghana, Gulf of Guinea Is., Kenya, Malawi, Nigeria, Sudan, Tanzania, Togo, Uganda, Zambia, Zaïre as per POWO;
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Regarding identification of the species collected from Khurda Odisha: 5 high res. images.
Cultivated ?
Tabernaemontana pachysiphon Stapf ??
Yes it is planted in the RPRC garden.
Yes, appears close to images at
https://commons.wikimedia.Tabernaemontana_pachysiphon
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References:
POWO Catalogue of Life Flora of peninsular India Wikipedia Wikimedia Commons Useful Tropical Plants