Vol. 76 No. 2 (2021)
Articles

Hedyotis hamiguitanensis (Rubiaceae: Spermacoceae), a new species from Mt. Hamiguitan, Davao Oriental, Philippines and its systematic position in Hedyotis

Propa Joy R. Santor
College of Science, University of Santo Tomas, España Boulevard, 1015 Manila
Duane Dominic B. Santiago
College of Science, University of Santo Tomas, España Boulevard, 1015 Manila
Conrado Joshua V. Mataga
College of Science, University of Santo Tomas, España Boulevard, 1015 Manila
Elyjha S. Gabriel
College of Science, University of Santo Tomas, España Boulevard, 1015 Manila
Grecebio Jonathan D. Alejandro
The Graduate School, University of Santo Tomas, España Boulevard, 1015 Manila
Published September 7, 2021
Keywords
  • Hedyotis,
  • Rubiaceae,
  • Philippines,
  • taxonomy
How to Cite
Santor, P. J. R., Santiago, D. D. B., Mataga, C. J. V., Gabriel, E. S., & Alejandro, G. J. D. (2021). Hedyotis hamiguitanensis (Rubiaceae: Spermacoceae), a new species from Mt. Hamiguitan, Davao Oriental, Philippines and its systematic position in Hedyotis. Webbia, 76(2), 195-202. https://doi.org/10.36253/jopt-10651

Abstract

Hedyotis hamiguitanensis, from Mt. Hamiguitan, Davao Oriental, Philippines, is described, illustrated, and compared with two similar species, H. whiteheadii and H. schlechteri. This species is distinguished from congeneric Philippine species by its 5–12 cm long, compound, umbellate inflorescences, pendulous flowers, lanceolate to oblanceolate, thick, scabrid leaf blades with revolute margins. Its phylogenetic systematic position within the tribe Spermococeae is determined with a phylogenetic analysis using chloroplast (rps16, petD) and nuclear ribosomal (ITS, ETS) nucleotide sequence data.

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