Seeds of Paepalanthus speciosus Koern. - Eriocaulaceae, when enclosed into naked fruits and in the diaspores, showed tolerance at thermic shock until 70ºC during 30 min. and this capacity was not modified when the thermic shock happened 24 h after the imbebition. Seed photoblastism was not affected by treatment with temperatures from 35 to 80ºC during 30 min. These results showed that seeds of P. speciosus have high capacity of survival at temperature developed during the burn of annual occurrence on "campo rupestre".
Paepalanthus speciosus; Eriocaulaceae; germination; photoblastism; campo rupestre