From Floral Database of Tamilnadu :  
BinomialHabitNotesReferencesDistributionCommon name
Pyrus communis L.TreeWestern Ghats & Eastern Ghats, Cultivated, Native of EurasiaFlora of Tamil Nadu, VOL. I, 1983Dindigul, SalemBerikkaai


Botanical name Synonyms Family Common name
Pyrus calleryana Rosaceae Ornamental Pear
Pyrus communis Rosaceae Pear
Pyrus pashia Pyrus kumaoni, Pyrus nepalensis Rosaceae Himalayan Pear

Pyrus crenata Buch.-Ham. ex D. Don (Nepal: Doubtful) (Pyrus crenata D.Donis a synonym of Pyrus pashia Buch.-Ham. ex D.Don)
Forest Plants of Eastern India By Amal Bhusan Chaudhuri (1993)- Brief details-
Pyrus insignis a synonym of Sorbus insignis (Hook.f.) Hedl.
Pyrus lanata D.Donis a synonym of Aria lanata (D.Don) Decne.
Pyrus sikkimensis (Wenz.) a synonym of Malus sikkimensis (Wenz.) Koehne ex C.K.Schneid.
Pyrus vestita a synonym of Sorbus cuspidata (Spach) Hedl.
Pyrus polycarpa Hook.f. (This name is unresolved, but some data suggest that it is synonymous with Micromeles polycarpa (Hook.f.) Panigrahi)
Indian Encyclopaedia, Volume 1 edited by Subodh Kapoor (2001)- Details-
Pyrus baccata Wall.
Pyrus malus a synonym of Malus domestica Borkh.
Pyrus sinica Royle (Unresolved)
An Excursion Flora of Central Tamilnadu, India By K. M. Matthew (1995)- Details-
Gardening in India By George Marshall Woodrow, G Marshall (1999)-
Encyclopaedia of North-East India: Meghalaya edited by Hamlet Bareh (2001)-
Pyrus khasiana (Decne.) Hook.f. is a synonym of Sorbus khasiana (Decne.) Rehder
Pyrus begeta (? Pyrus baccata Wall.)
Pyrus & Sorbus (Rosaceae) : 1 post by 1 author.  

I have updated eFI (efloraofindia) page on Pyrus & Sorbus (Pl. click).

Attempts have been made to incorporate most of the species available in India & nearby areas with details & keys directly or through links as far as possible. It’s quite possible that there may be some discrepancy in the accepted names & synonyms taken from other links.

Species discussed so far in efloraofindia are given at the bottom of the page in the form of links against Subpages. On clicking them one can see all the details.

If someone can provide complete list of Indian species with source references it will be wonderful.

Any comments/ corrections are welcome.