A new species of Psydrax (Vanguerieae, Rubiaceae) from Luzon, Philippines including its conservation status

Abstract

Psydrax puberula, a new species from the Philippines is here described and illustrated. It can easily be distinguished from the currently recognized Malesian Psydrax with its puberulent compound umbellate inflorescences with 14–25 flowers as well as a puberulent fruit stalk and fruit. P. puberula is the second species of Psydrax in the Philippines.

<i>Pyrostria triflora</i>, a new species of Vanguerieae (Rubiaceae) from Luzon, Philippines

“…Arriola & Alejandro (Alejandro et al, 2013), several features (size of leaf blades, leaf apex and base, and longer peduncular bracts) delineate the former from the latter. The inflorescence of our material approach that of the Madagascan Pyrostria pendula Lantz, Klack.…”

Psydrax multiflora sp. nov. (Rubiaceae) from Palawan, Philippines

“…As part of our continuing effort in revising the Philippine Vanguerieae (Arriola and Alejandro ) and the ongoing project in Philippine Rubiaceae (Alejandro and Liede‐Schumann ), several botanical explorations have been undertaken to recollect the endemic species of the family. With all the Rubiaceae taxa collected in the forested regions of Narra, Palawan, an interesting species of Vanguerieae that shows features of the genus Psydrax was observed and examined.…”

“…Psydrax Gaertn. is a monophyletic genus of the tribe Vanguerieae in Rubiaceae currently circumscribed by having coriaceous leaf blades, keeled stipules, reflexed anthers, cartilaginous seeds and a very shallow to nearly inconspicuous apical crest without a lid‐like area in the pyrene (Bridson , , Cheek and Sonke , Arriola and Alejandro ). The genus comprises more than 100 species of trees, shrubs and lianas that are widely distributed in Africa, Madagascar, Asia, the Pacific and Australia (Lantz et al ).…”

Flora of Singapore precursors, 3. A new species of Canthium (Rubiaceae: Vanguerieae) previously confused with C. horridum

“…A number of non-spiny, arborescent taxa of Canthium s.l., which do not develop brachyblasts, have been removed or maintained as distinct genera, such as Psydrax Gaertn. (Bridson, 1985;Wong, 1988Wong, , 1989Ridsdale, 1998;Chen et al, 2011;Arriola & Alejandro, 2013;Mahyuni et al, 2018;, Keetia E.Phillips (Bridson, 1986), Pyrostria Comm. ex A.Juss.…”