Paddy straw mushroom is Volvariella volvacea. Growers in Odisha and Bengal call it parali or chhatu. It is a warm-climate fungus. Its mycelium, the white thread network that is the living body of the fungus, runs fastest in heat that would kill button mushroom mycelium. The ICAR-DMR species table gives spawn run, the days when mycelium spreads through the straw, at 32 to 34 °C and fruiting at 28 to 32 °C.
DMR reports it is most popular in the coastal states: Odisha, Andhra Pradesh, Tamil Nadu, Kerala and West Bengal. On the north Indian plains the natural window is July to September, the humid monsoon months. In the hills it needs artificial heat and is rarely worth the cost.