Some 470 specimens of hyphomycetes reported earlier from about 85 plant families of lowland central Burma were reviewed for pattern and process of fungus-host associations in the field. Cercospora/Allies, Alternaria/Nimbya, Fusarium, Bipolaris and Curvularia associated more frequently as foliar pathogens with larger families like the Asteraceae, Fabaceae and Poaceae than with medium to smaller families notably the Cucurbitaceae, Euphorbiaceae, Lamiaceae, Malvaceae, Solanaceae, and Zingiberaceae. Plant-fungus interactions being inferred from these associations, it is hypothesized, using collection frequency analyses, that interactions (I) varied jointly with the fungus (F) and the host plant (P) family as per symbolic representation:This note presents fungus-host associations between foliar hyphomycetes and wild plants in natural vegetation of lowland central Burma. The objective was to discover pattern and process of associations in the field, and to observe that being the joint end products of plant-fungus interactions in their trophic encounters, the associations reflect and represent the interactions. The study also aimed to develop a hypothesis of plant-fungus interactions (I) following a pattern of joint variation between plant family (P) and fungus (F) genus, which is expressed as: I = F × P = FP.Lowland central Burma is a dry-zone biome in a tropical dry to wet monsoon ecosystem between latitudes 22°34′ N 95°42′ E and 18°48′ N 95°13′ E. It is crisscrossed with mostly rain-fed agroecozones of legumes, grains, fibers, sugarcane and vegetable crops, thus supplying a vast source and a broad base for variable lifestyles of fungal communities. The high temperatures and low precipitations are the only major ecological constraints.Cercospora, Alternaria and Fusarium species have been reported applying a number of morphologic and physiologic characters, melanin, phytotoxins, pathotypes, reactive oxygen species, living strategies, etc. for their success as foliar pathogens of cultivated plants (Daub and Chung . They cause multicyclic diseases generally referred to as alternarioses, cercosporioses, and fusarioses. However, their performance as such on wild plants in nature is hitherto unknown or unavailable. Likewise, their trophic interaction has never been recorded as a process of joint variation with plant, resulting in association identifiable by signs or symptoms of a pathologic condition.Materials collected randomly and intermittently by Thaung (1984Thaung ( , 2008 from plants over a period of 5 consecutive years and on deposits at Herb. IMI and UC (= LAM) were revisited. Specimens of 12 common hyphomycete genera and their host plant families were selected and analyzed as