This is a morphologically distinct species (Fig. 1), characterized by slender, erect, tubelike lobes (0.5-)1-2(-3) mm wide and 2-3(-4) cm tall, with convoluted, overlapping and occasionally fused, flexuous, crisped margins and typically helmet-shaped hooked tips which occasionally bear inconspicuous patches of white pruina. No apothecia have been detected. The spot tests with K, C, and P are all negative, but usnic acid and protolichesterinic acid have been identified with TLC. Flavocetraria minuscula is like a miniature morph of F. cucullata (Bellardi) Kärnefelt & Thell, which it also matches in thallus chemistry. It differs from that species, however, in having narrower, more tubular lobes with helmet-shaped lobe tips. Cetraria cucullata f. minuscula was described by A. Elenkin and V. P. Savicz (1910) from a mountain range along the Pacific coast of the Russian Far East. Previously, it was only known from a few scattered coastal and inland localities in northeastern Asia. As opposed to F. cucullata, which is a widespread circumpolar arcto-boreal species, F. minuscula seems to have an amphi-Beringian distribution (Eastern Siberia, Chukotka, Interior Alaska), being mostly confined to boreal forests, both on mountains and in lowlands. One find is from the tundra zone, though F. minuscula is most probably absent from the High Arctic. Indeed, specimens from Franz Josef Land, Severnaya Zemlya, Taimyr Peninsula, and annotated as “f. minuscula” in the herbarium LE, have proved to be just small morphs of F. cucullata. In the interior of Alaska, F. minuscula was observed to be locally rather abundant, forming distinct patches among “normal” F. cucullata. It grows in mesic conditions on soil, mostly within lichen-moss carpets, and was once found over a rotten mossy log imbedded in the soil. Cetraria cucullata var. rabotnovii, described from southern Sakha Republic (Yakutiya) (Oksner 1940), is most probably a synonym of F. minuscula. We have not found the type of the variety, but its protologue matches F. minuscula very well. More data on this species and its range will be given in another paper, which is being prepared by Teuvo Ahti (Helsinki) and Lena Poryadina (Yakutsk).