Neonauclea viridiflora (Rubiaceae), a New Species of Naucleeae from Eastern Samar, with Notes on Myrmecophytic Species in the Philippines

A new myrmecophytic species, Neonauclea viridiflora, is described from Eastern Samar, Philippines. It bears similarity to N. formicaria, but is easily distinguished by having obovate leaves, smaller flowering heads of 30–35 mm, persistent calyces that are glabrous inside the tube, calyx shafts that...

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Bibliographic Details
Published in:Systematic botany 2017-06, Vol.42 (2), p.364-370
Main Authors: Ordas, Jorge Anton D., Banag, Cecilia I., Alejandro, Grecebio Jonathan D.
Format: Article
Language:English
Subjects:
Calyx Lobes
Discovery and exploration
Endangered
Endemic
Mindanao
Rubiaceae
Taxonomy and Floristics
Visayas
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Description
Summary:A new myrmecophytic species, Neonauclea viridiflora, is described from Eastern Samar, Philippines. It bears similarity to N. formicaria, but is easily distinguished by having obovate leaves, smaller flowering heads of 30–35 mm, persistent calyces that are glabrous inside the tube, calyx shafts that are connate at the bases for 0.8–2.5mmor sometimes entirely connate with the adjacent lobe, apical portions of the calyces that are bluntly turbinate but globose to clavate when dry, calyx summits that are bluntly conical but the apex is somewhat flattened when dry, and smaller and slender light green corollas. Comparative illustrations of the calyx lobes, a key to the Philippine myrmecophytic Neonauclea species, and a map for these species' distributions in the Philippines are provided in the study.
ISSN:0363-6445
1548-2324
DOI:10.1600/036364417X695592