NOTES ON TROPICAL ASIAN THUIDIACEAE, WITH TWO NEW MALESIAN SPECIES OF THUIDIUM S.L.

Abstract

  Thuidium hattorii Touw is a new dioicous species belonging to the Lorentzia assemblage. It has been collected in the Philippines, Borneo, Sulawesi, Seram, and New Guinea. The Lorentzia assemblage consists of four species forming two very distinct groups differing in sexual condition and properties of the perichaetium, the calyptra, and the sporophyte. The type species (T. velatum) is the only monoicous one. The dioicous group comprises T. bifarium, T. hattorii, and T. plumulosum (previously accommodated in Thuidium subg. Thuidium). T. watanabei is a new species previously mistaken for T. contortulum and T. sparsifolium.