Additional four new species of Hoya R.Br. (Apocynaceae) from the Philippines
Abstract
Four new Philippine endemic species of Hoya R.Br. (Apocynaceae) are described, namely: Hoya aurantiaca Kloppenburg, Siar et Cajano, H. lucardenasiana Kloppenburg, Siar et Cajano, H. landgrantensis Kloppenburg, Siar et Cajano, all from Barangay Kapatalan, Siniloan, Laguna Province and H. soligamiana Kloppenburg, Siar et Cajano from Atimonan, Quezon Province. These four new taxa bring the number of described Philippine Hoya species to 68.
Key words: Hoya, wax plant, porcelain plant, Hoya aurantiaca Kloppenburg, Siar et Cajano sp. nov., Hoya lucardenasiana Kloppenburg, Siar et Cajano sp. nov., Hoya landgrantensis Kloppenburg, Siar et Cajano sp. nov., Hoya soligamiana Kloppenburg, Siar et Cajano sp. nov., Sect. Acanthostemma, Sect. Otostemma, Apocynaceae, endemic species, corona, stylar crown, pollinium, retinaculum, translators, caudicle, Kapatalan, Siniloan, Laguna Province, Atimonan, Quezon Province, Philippines.
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