瓦胡柄锈菌,夏孢子堆生于叶两面,圆形或长椭圆形,散生或聚生,小,直径0.2-0.4mm,被表皮覆盖或裸露,常被破裂的表皮围绕,粉状,淡褐色或橙黄色;侧丝少数,棒状,向内弯曲,无色;夏孢子近球形、倒卵形或宽椭圆形,(20-) 25-32(-36)×(16-)20-25(-27)μm,壁黄褐色或肉桂褐色,1.5-2μm厚,有刺,芽孔4-6个,腰生或散生。Ellis & Everhart Bull. Torr. Bot. Club 22: 435, 1895; Sawada, De- scriptive Catalogue of the Formosan Fungi lV, p. 63, 1928; Hiratsuka & Hashioka, Bot. Mag. Tokyo 49: 20, 1935; Cummins, Mycologia 43: 94, 1951; Cummins, The Rust Fungi of Cereals, Grasses and Bamboos, p. 87, 1971; Tai, Sylloge Fungorum Sinicorum, p. 663, 197