These conidiophores are indistinguishable from vegetative hyphae until production of the first conidium. Growing obliquely form the apex of a phialide are long chains of conidia (singular conidium). Conidia (singular&colon; conidium) are spores produced at the tip of special branches called conidiophores. The conidium of this species are hyaline and characteristically curved. If no hosts are available for infection, a smaller secondary conidium may develop. The formation of blastoconidia involves three basic steps&colon; bud emergence, bud growth, and conidium separation. Each conidium is haploid and bears only one nucleus. Conidium production is higher in wet than dry conditions. Each conidium can multiply to form many additional conidia relatively quickly. The phialide development and conidium formation in "A. clavatus" has been examined using TEM. Because each conidium creates CATs, the result is a network of conidia all connected together. Conidium development is distinctive and was first described by Ingold in 1956. "Aspergillus wentii" produces single-celled, globose, conidia (singular conidium) in unbranched, filamentous chains. The rachis elongates after each conidium is produced, resulting in a long zig-zag extension.