Abstract. A new species and a rediscovery in the genus Saurauia (Actinidiaceae) from Zamboanga Peninsula, Mindanao island, Philippines are presented here. The new species, Saurauia abbreviata, closely resembles Saurauia lanaensis Merr. but can be differentiated by having longer petioles, uniformly setose adaxial leaf surface, longer and wider leaves, more lateral veins, 3 styles, and a 3(–4)-locular ovary. This discovery raises the current number of recognized Saurauia in the Philippines to 57 following an 87-year gap in the taxonomic study of this genus in the country. S. longipedicellata Merr. is also rediscovered after almost a century. A lectotype is here assigned for this name selected among the syntypes. Photographs, ecological notes, and an amended description are also provided to aid taxonomic identification.   Abstrak. Usa ka bag-ong species ug nadiskobrehan pag-usab sa genus nga Saurauia (Actinidiaceae) gikan sa Zamboanga Peninsula, isla sa Mindanao, Philippines ang gipresentar dinhi. Ang bag-ong species, Saurauia abbreviata, nahisama pag-ayo sa Saurauia lanaensis Merr. apan ang bag-ong species adunay labi ka taas nga mga petioles, uniformly setose ang ilalom nga dahon, mas taas ug mas lapad nga dahon, labi pang mga lateral veins, 3 styles, ug 3(–4)-locular nga obaryo. Ang nadiskobrehan nagdugang sa kadaghanon sa mga giila nga Saurauia sa Pilipinas ngadto sa 57 human sa 87 ka tuig nga gintang sa taxonomic nga pagtuon sa kini nga genus sa nasud. Ang Saurauia longipedicellata Merr. nadiskobrehan usab pagkahuman sa hapit usa ka gatus ka tuig. Ang tipipikasyon gihimo dinhi aron mapalig-og ang ngalan. Mga litrato, mga notang ekolohikal, ug giusab nga hulagway alang sa maong species makita usab dinhi.

Two new species of Begonia section Petermannia from Zamboanga del Norte, Philippines are described and illustrated: Begonia amamampang and Begonia turugsoy. Begonia parvilimba was also rediscovered and an updated description is provided. All morphological characters and measurements were observed in the wild from living plants. This brings the record to a total of 16 Begonia species under this section found in the region of Zamboanga Peninsula making Zamboanga a center of diversity of section Petermannia in the Philippines. Notes on their ecology, distribution map and proposed conservation assessment are provided.

Macrosolen zamboangensis, a new mistletoe species from the Zamboanga peninsula of the island of Mindanao (Philippines), is described. The new species is a member of the widespread M. melintangensis species complex, but differs from the previously described species in this complex in having a conspicuously papillose corolla head. It is also the only species in this complex that displays a combination of papillose pedicels, calycula and fruits, at least 3–4 inflorescence axes grouped at a node, and relatively small flowers that are clustered at the apex of a raceme (a subumbel) instead of being more evenly distributed along the inflorescence axis. The conservation status of this new species is considered Vulnerable (V).

A collection of a ginger from Zamboanga Peninsula, Philippines, superficially resembles Hornstedtia but is very different from all other known Philippine species especially by the elongate rachis and absence of sterile bracts. Furthermore, it does not match any other species elsewhere. In order to ascertain its generic placement, phylogenetic analyses using ITS and trnK/matK regions were conducted revealing a close relationship with H. tomentosa from Borneo, Java and Sumatra. The mystery species, H. tomentosa and the type of Hornstedtia are placed within a highly supported clade. Morphologically, it is similar to H. tomentosa having an elongate rachis with red bracts and yellow flowers but differs by the swollen and white mucro to the fertile bract, presence of a bracteole and the petaloid labellum. As a result, Hornstedtia albomucronata, is described as a new species here, and illustrations and information on its distribution, habitat, phenology and provisional IUCN conservation status are provided. An updated key to the nine Hornstedtia species in the Philippines is included.

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