<p><strong><em>Begonia</em></strong><strong> <em>depressinerva</em> (sect. <em>Baryandra</em>, Begoniaceae), a new species from Luzon Island, the Philippines</strong></p>

Abstract

A new peltate species of Begonia sect. Baryandra from Kidadayaig Falls, General Nakar, Quezon is described and illustrated here. The new species, B. depressinerva, is diagnosed against the morphologically similar B. tayabensis. The two species are similar by having rhizomatous stem, peltate, ovate leaf, and 5-tepalled pistillate flower, but the new species is remarkably different by having densely pilose, asymmetric leaf blade, densely pilose petiole that is inserted much closer to the basal margin, obtuse to subobtuse staminate flower outer tepal apex, and glandularly hairy ovary. B. depressinerva is proposed to be Vulnerable (VU) D1, following the guidelines of the IUCN.

Cytological Study of <i>Begonia</i> Sect. <i>Baryandra</i> (Begoniaceae)

“…Subsequent botanical explorations and taxonomic studies revealed additional diversity of sect. Baryandra across the Philippines (e.g., Rubite et al 2014, 2018, Tandang et al 2016, Peng et al 2017, Magtoto et al 2018, Calaramo et al 2019, Pranada et al 2019, Rule et al 2020, drastically increasing the section to 78 species up to date (Hughes et al 2015 onward: https://padme.rbge. org.uk/Begonia/home).…”