Rust fungi collected in Thailand in the past three decades were examined and identified. In
this paper, we report seven Puccinia species: P. austroyunnanica on Gouania aff. leptostachya
(Rhamnaceae) in Nakhon Ratchasima Prov.; P. costina on Cheilocostus speciosus (Costaceae) in
Chiang Mai Prov.; P. curculigonis on Curculigo aff. orchioides (Hypoxidaceae) in Chiang Mai
Prov.; on Curculigo sp. in Chiang Mai Prov.; and on Molineria latifolia (Hypoxidaceae) in Ranong
Prov.; P. dianellae on Dianella ensifolia (Xanthorroeaceae) in Chiang Mai Prov.; P. ferruginea on
Smilax sp. (Smilacaceae) in Provinces of Chiang Mai, Mae Hong Son, and Phuket; P. impatientisuliginosae
on Impatiens garrettii (Balsaminaceae) in Chiang Mai Prov.; P. rhei-undulati on Rheum
rhabarbatum (Polygonaceae) in Chiang Mai Prov. Puccinia austroyunnanica and P. impatientisuliginosae
were only known from Yunnan Prov., China, and P. costina from the Philippines and
Papua New Guinea.