Wednesday, February 7, 2018

[Botany • 2016] Begonia titoevangelistae • A New Species (Begoniaceae, sect. Baryandra) from Catanduanes Island, the Philippines

Begonia titoevangelistae D. Tandang & R. Rubite

in Tandang, Rubite, Angeles & De Guzman, 2016. 


Begonia titoevangelistae from Nahulugan Falls, Gigmoto, Catanduanes Island is described as a new species endemic to the Philippines. It resembles Begonia neopurpurea but is distinguished by the variegated leaves where the veins and midrib are dark green to almost black contrasting with light green interveins in the adaxial surface. In the abaxial surface, the veins are maroon contrasting with cream interveins, and its wide obliquely ovate leaf is elongated with shallowly undulate and minutely lobed leaf margin and long acuminate apex. Based on International Union for the Conservation of Nature red list criteria, B. titoevangelistae was assessed to be critically endangered, since it consists of one population with 300 individuals on a 100 m area around the waterfalls, which is being developed into a tourist spot.

Keywords: Begonia, Catanduanes, section Baryandra, critically endangered, Eudicots

Begonia titoevangelistae D. Tandang & R. Rubite

Etymology:—The species epithet is named after Dr. Luisito T. Evangelista the current Officer in-Charge— Curator I of the Botany Division, National Museum of the Philippines. Dr. Evangelista is fondly called “Sir Tito” by his colleagues thus the specific epithet titoevangelistae

Distribution and Habitat:—There was only one population discovered in June 28, 2015 at Nahulugan Falls, Gigmoto, Catanduanes Island. The plants grow on moist rocks under trees and shrubs near the waterfalls. 

Danilo N. Tandang, Rosario R. Rubite, Raul T. Angeles Jr. and Margaret C. De Guzman. 2016. Begonia titoevangelistae (sect. Baryandra, Begoniaceae) A New Species from Catanduanes Island, the Philippines. Phytotaxa. 282(4); 273–281. DOI:  10.11646/phytotaxa.282.4.4