摘要：Cycas circinalis var. orixensis Haines (Cycadaceae) is raised to species rank and a new species, Cycas nayagarhensis is described and illustrated from the state of Odisha in the northern Eastern Ghats of India. Both of these Odisha Cycas species described here, have characteristic megasporophylls having spinescent lateral teeth and a spear-like long apical spine. Male cones are the most peculiar in having microsporophylls with upturned, one to variously forked apical spines. Cycas nayagarhensis is distinguished from C. orixensis by its massive arborescent stem, large male cones, with microsporophylls having entire or variously forked apical spine and radially compressed ovules. A comparative table of the northern Eastern Ghats Cycas and a key to all the Indian species are provided. The infrageneric classification of the genus Cycas is modified and a new Subsection Orixenses under Section Cycas is created here to accommodate these two morphologically distinct endemic taxa from Odisha
关键词：Cycas orixensis; Cycas nayagarhensis; Eastern Ghats; Odisha; India
