Glomus spinosum sp. nov. In the glomaceae from Taiwan

Abstract

Glomus spinosum forms yellowish brown to dark red brown spores in sporocarps or single in the soil. The chlamydospores are 40-90μm in diam., and have a 4-10μm thick wall which consists of a thin pale yellow-brown outer wall covered with a hyaline to light yellow dense mass of flexible hairy spines, up to 15 μm long and each up to 3 μm in diameter, a thick dark brown laminated middle wall with warts on the surface, up to 1 μm high, and a thin yellowish brown inner wall in one wall group. Glomus spinosum forms typical vesicular-arbuscular mycorrhizae with Cunninghamia lanceolata and other plant species.