]> [collector note: Types, etc. mainly in H, dupl. in CANL, LE, MIN, NFLD, NFM, NY, SP, TRTC, UBC, US, VEN, WIS.; col. with O. Huber & J. J. Pipoly in 1985] [author note: Herbarium & Types: mainly in H; dupl. in ALA, BRG, CANL, LE, MIN, NFLD, NFM, NY, SP, TRTC, UBC, US, VEN, WIS. Research: Lichen-forming fungi, especially Cladoniaceae; Neotropical Cladonia; Lichen flora of Alaska, Finland and Canada (especially British Columbia, Newfoundland], Fl. Guianas, Mediterranean, Nordic Lichen Flora. Example of Names Published: Parmelia halei Ahti, Acta bot. fenn. 70: 38 (1966; Rumex longifolius f. callosus (Hiitonen) Ahti & Hämet-Ahti, Ann. Bot. Fenn. 8(1): 48. 1971 Botany Ahti, Teuvo Tapio Ahti, Teuvo Tapio T. T. Ahti Ahti Teuvo Tapio Ahti Ahti, Ted 1934