Resolving Taxonomic Confusion between Hoya cumingiana Decne. and Hoya densifolia Turcz. (Apocynaceae) using Leaf Architectural Analysis

Alcona Mae P. Baltazar; Inocencio E. Buot, Jr.

Authors

Alcona Mae P. Baltazar Deparment of Biological Sciences, Cavite State University – Main Campus, Indang, Cavite; Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines Los Baños, College, Laguna.
Inocencio E. Buot, Jr. Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines Los Baños, College, Laguna; Faculty of Management and Development Studies, University of the Philippines Open University, Los Baños, Laguna

Keywords:

Hoya cumingiana, Hoya densifolia, leaf architecture, leaf venation, taxonomy.

Abstract

Hoya cumingiana and Hoya densifolia are facing taxonomic confusion due to their almost similar foliar and reproductive structural characters. In this study, 10 leaf samples for each species were collected and subjected to leaf architectural analysis. The two Hoya species showed dissimilarities in terms of blade shape, apex shape and angle, secondary vein spacing, secondary vein angle, and tertiary vein fabric. Cluster and ordination analyses revealed that H. cumingiana and H. densifolia are two separate species.

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