Portulaca pilosa var. tuberosa

Portulaca pilosa var. tuberosa (Roxb.) V.V.Sivarajan (syn: Portulaca cristata Buch.-Ham.; Portulaca pilosa Herb.Madr. ex Wall.; Portulaca tuberosa Roxb.);

India (Uttar Pradesh, Bihar, West Bengal, Orissa, Punjab, Rajasthan, Maharashtra, Andhra Pradesh, Tamil Nadu, Kerala), Sri Lanka, Laccadives, Java, Pakistan (Sind, Karachi), Maldives, Ashmoore Reef, Christmas Isl. (Austr.) as per Catalogue of life;

Please identify this herb like plant.
Portulaca sp.
Portulaca species in eFloraofindia (with details/ keys from published papers/ regional floras/ FRLHT/ FOI/ Biotik/ efloras/ books etc., where ever available on net) 
Most probably Portulaca tuberosa Roxb. which is under unresolved category in TPL or can considered as P. pilosa.
P. tuberosa differs from P. pilosa with spreading habit and tuberous main root.
Flowers bright yellow (Flora of India, Vol 3) while pinkish-yellow (Flora of Rajasthan).
Petals 4-6 (P. pilosa and P. tuberosa),
Stamens: P. pilosa= 10-16; P. tuberosa=10-25.
we all know from experience in gardening for flowers that some plants can develop different colour flowers based on micro nutrients ie mainly metal ions in the soil or added fertilizers
so its not surprising that colors in two different states's soil produces two different colors of the flowers
thanks ... for the details