Amorphophallus calcicolus from the forest over karst of Bohol island, Central Visayas, Philippines is hereby described and illustrated. The species is closely related to A. longispathaceus but distinct in having shorter leaves, smaller male zone, depressed disk-shaped ovary, longer styles, ovoid or irregularly shaped warts inside the spathe base, and shallowly 2–3-lobed stigma. Due to anthropogenic factors and a relatively confined distribution, it is hereby proposed as Critically Endangered (CR) following IUCN guidelines.

No abstract

Begonia adamsensis from the northern part of Luzon Island is described as a new species endemic to the Philippines. This is the latest addition to the Begonia sect. Baryandra, making the total of Philippine begonias in this section to 56 species. It resembles Begonia hernandioides because its leaves are peltate, with a broad base, acuminate tip, nearly entire margin, and a glabrous peduncle; however, it differs significantly from B. hernandioides because of its broadly ovate red stipule, pubescent petiole, elliptic peltate leaf, pubescent abaxial lamina, and 4 perianth segments in the carpellate flower. Only about 200 individuals were found in a 100-m area that is being developed as a tourist spot in the locality, hence Begonia adamsensis is hereby proposed as critically endangered.

Within the Pantabangan–Carranglan Watershed Forest Reserve in Nueva Ecija, a small population of an inconspicuous Begonia was encountered. After thorough investigation, it is described here as a new Philippine Begonia species in sect. Petermannia. The new species, Begonia naemma Y.P.Ang, Aumentado & Magtoto, is distinguished from the allied species B. polyclada C.I Peng, C.W.Lin & Rubite by its larger leaves, leaf adaxially sparsely hirsute between the veins, more numerous stamens, and larger ovary wings that are ovate to oblong. Based on IUCN criteria, Begonia naemma is designated as Endangered (EN). A comprehensive description and illustration of Begonia naemma are provided.

Ardisia kalimbahin is herein described and illustrated as a new species. It is the latest addition to the richness of Ardisia in the Philippines. It closely resembles A. romanii Elmer but is distinct in having shorter petiole, shorter elliptic leaves, racemose inflorescence, longer and sparsely puberulent pedicels, magenta corolla lobes, basifixed anthers, shorter filaments, and a beaked stigma. Based on current collection and available herbarium specimens, Ardisia kalimbahin is distributed in the islands of Palawan (Aborlan), Mindoro, and Luzon (Carranglan). Available data is not enough to assess its conservation status; hence, it is proposed as data deficient (DD).