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Cycas dharmrajii sp. nov. (Cyadaceae) from Andaman and Nicobar Islands, India
Author(s) -
Singh Lal Ji
Publication year - 2017
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/njb.01284
Subject(s) - biology , botany , habit , leaflet (botany) , hook , conservation status , stipule , mucilage , key (lock) , habitat , ecology , psychology , structural engineering , engineering , psychotherapist
Cycas dharmrajii L.J.Singh (Cycadaceae), a new species from the Andaman Islands, India is described and illustrated, and its conservation status is assessed. An abnormal branching habit of the giant trunk, its swollen base, often branched, polymorphic aerial roots, medium‐sized leaves, megasporophylls with well‐defined 10–28 paired lateral hook‐like structures and 1–3 pairs of ovules, 2‐schizo‐lysigenous mucilage canals in leaflet, and characteristic pitting on the periclinal walls of the epidermal cells of the leaflets distinguishes it from all previously known species. A key to the species of Cycas from the Andaman and Nicobar Islands is also provided.