Crepidium is a large genus of mainly pantropical orchids. The lips of its flowers are upwardly directed and do not serve as landing platforms for pollinators. This role is assumed by the dorsal sepal and/or gynostemium. Information about the pollination and floral morphology of this genus is scarce. To date, no papers have been published on these topics. Field observations have revealed that the flowers are visited by small flies, midges, fruit flies, other small dipterans, ants, spiders, and mites. Preliminary observations revealed at least two forms of small liquid droplets secreted on the lip surface of Crepidium species: simple secretions from epidermal cells, and cell sap released upon the rupturing of raphide-producing cells. Further research revealed that this was the first time liquid secretion was recorded in this genus. Floral secretions were subjected to sequential organic solvent extraction and gas chromatography–mass spectrometry (GC–MS). Floral parts were investigated by means of scanning (SEM) and transmission electron microscopy (TEM), and histochemical tests. The presence of liquid droplets on the lip of Crepidium, the presence of a food reward, and the sequence of raphide development are reported here for the first time.

Bali and Lombok are well known as popular touristic destinations. Both islands are accessible for potential floristic research, but surprisingly, information on their orchid flora is rather scarce and random. During our visits, among other orchid groups, we had an opportunity to observe several representatives of the tribe Malaxideae, which is considered to be one of the biggest and most interesting orchid groups with over 1700 taxa (including synonyms). In this paper, we present the first attempt at organizing the knowledge about these unique, often underestimated, orchids in Bali and Lombok, and we report several new records for both islands. For Bali, there are six from the genus Crepidium and four from Liparis sensu lato, and for Lombok, one from Crepidium and three from Liparis sensu lato.

This is the first part of a taxonomic revision of section Hololobus of the paleotropical orchid genus Crepidium (Orchidaceae–Malaxidinae). Based on morphology and habit, the new subsection Maximowiczianae is established to include six species from India, Malaysia, Indonesia and the Philippines. The new combination Crepidium carinatum is published with C. benguetense as a synonym. A key is provided, and all species are described and illustrated.

Nerviliais an orchid genus of approximately 80 ephemeral taxa that are widely distributed throughout the subtropical and tropical regions of Africa, Asia, Australia, and Oceania. Scientific information and research materials gathered from Bali are scarce. While trekking around Bali, we encountered a few representatives of this taxon. This led to further investigation of the genus and its occurrence in Bali, which is summarized in this article. New records ofN. concolorandN. punctatafrom Central Bali have enriched previously known sites, and as species that appear ephemeral often go unnoticed this is a valuable contribution to the understanding of the geographic distribution of this genus.