Four new Asian taxa are described and illustrated as part of a forthcoming taxonomic revision of the cultivated species of Begonia (Begoniaceae). The new species B. argenteomarginata (sect. Symbegonia) is described from Papua New Guinea. Two new species from section Petermannia are described: B. polilloensis from the Philippines and B. rachmatii from Sulawesi, Indonesia, both of which are unusual in having palmately compound leaf blades. A key is provided for these and a previously described species, B. oligandra, also with palmately compound leaf blades and in section Petermannia. The new subspecies B. brevirimosa subsp. exotica (sect. Petermannia) is described from the Central Range of Papua New Guinea and a brief history of its cultivation is presented.

Two new species of Boraginaceae are described from Turkey: Paracaryum hedgei and Rindera dumanii. Their affinities and phytogeography are discussed. Both species are illustrated and their distributions mapped. Rindera sect. Bilegnum is raised to subgeneric rank as Rindera subgen. Bilegnum.

The new species Cynoglossum vanense (Boraginaceae) from around Lake Van and Hakkâri in eastern Turkey is described and illustrated. Its larger nutlets with relatively long glochids separate it from other known species in subgenus Cynoglossum.

A new species of Onosma (Boraginaceae), O. mersinana, in sect. Asterotricha, is described from southern Turkey, and its affinities discussed.

Two groups of species are dealt with: first, Cyrtandra schizostyla together with three new species, all notable for the extraordinary elaboration of their anthers; second, C. velutina and C. diplotricha together with four new species, notable for their remarkably slender, soft-walled fruits. All species are fully described and identification keys provided.

Six new species of Cyrtandra from Borneo (C. apaensis, C. burleyana, C. filisecta, C. subsphaerocarpa, C. tibangensis, C. toreniiflora) are described. Cyrtandra albibracteata is re-described in order to correct gross errors in the original paper. The published diagnosis validating C. paragibbsiae from Brunei is supplemented by a full description.

New descriptions, followed by discussion, are given for the following species described by Kraenzlin: Cyrtandra cerea, C. foveolata, C. megalocrater, C. prostrata, C. quinquenotata, C. robusta, C. strictipes; C. populifolia, as enumerated by Kraenzlin, is a misdetermination. Cyrtandra paxiana and C. serratobracteata are also re-described, and one recently discovered new species, C. crockeriana, is established.

Cyrtandra phoenicolasia, C. hottae and five new species constitute a group distinguished by a suite of characters including setose vegetative parts, deeply divided calyx, small white corolla marked on the lower lip with yellow to brown, unilateral disc, ovary constricted at base, and fruit small. All species are fully described and an identification key provided.

The new names Asplenium luzonicum and A. perplexum are published to replace the homonyms A. cristatum Brack. and A. riparium Brack.; their nomenclatural history is reviewed and data are provided to support their retention as separate species. The legitimate name A. baileyanum should be used instead of the homonym A. gracile Fée.