. Brigham Young University science bulletin. Biology -- Periodicals. 40 Bricham Young University Science Bulletin PTEROPSIDA-GYMNOSPERMAE Pinaceae Pine Family Picea glauca (Moench) Voss Locality #16, Rigby 25, 23 June; #60, WR 10046, 30 June; #67, WR 10096, 1 July; #76, WR 10432, 10 July. On terraces, gravel bars, lake shores, and mountain slopes, in taiga and boreal forest. A dominant species. Picea mariana (Mill.) Britt, Stems., Pogg. Locality #50, WR 10509, 11 July. Tundra- taiga transition, an Kayak shale. This specimen has only a few hairs along the leaf base and lacks cones. It is tentat
. Brigham Young University science bulletin. Biology -- Periodicals. 40 Bricham Young University Science Bulletin PTEROPSIDA-GYMNOSPERMAE Pinaceae Pine Family Picea glauca (Moench) Voss Locality #16, Rigby 25, 23 June; #60, WR 10046, 30 June; #67, WR 10096, 1 July; #76, WR 10432, 10 July. On terraces, gravel bars, lake shores, and mountain slopes, in taiga and boreal forest. A dominant species. Picea mariana (Mill.) Britt, Stems., Pogg. Locality #50, WR 10509, 11 July. Tundra- taiga transition, an Kayak shale. This specimen has only a few hairs along the leaf base and lacks cones. It is tentatively assigned to P. nmri- ami, but might represent a hybrid with P. glauca. PTEROPSIDA-ANGIOSPERMAE-DICOLYLEDONEAE Betulace;\e Birch Family Alnus crispa (Ait.) Pursh var. cris^m Locality #30, WR 10323, 8 July, #.36, WR 10194, 3 July; #72, 10654, 13 July. Stream bank and heathland component, widespread. Betula glandulifera (Reg.) Buder Lociility #67, WR 10097, 1 July; #79, Rig- by 130b, 26 July. These are shrubs with ch;u-- acteristias intennediate between B. glwuhtlosa and B. j)a])t/rifera. They grow along river banks and bluffs iii Old Crow Flat. Betula glandulosa Michx. var. glandulosa Locality #8, WR 10147, 1 Julv; #16, Rigby 27, 40, 23 June; #24, WR 10126', 1 July; #52, WR 10479, 11 July; #65, WR 10301, 8 July; #73, Rigby 54, 24 June. Dwarf birch is abundant in most ph;xses of alpine and arctic tundra and heathlands. In favorable locations it is erect, reaching a height of 2 to 4 feet. In less favorable sites, it is a prostrate spreading shrub. Betula papyrifera Marsh var. (Sarg.) Raup Locality #67, WR 10095, 1 July; #79, Rig- by 130, 134, 26 July. White birch Ls a component of riparian woods and occurs on bluffs along stream channels in the lower reaches of Old Crow Fig. 36. - 'â !. , '- !â â nil^ iiMi,. v-. J ,i- ^ mi I .^,<u^^ \\,r nnrth ot Old Crnw Flats. The woods are at ap|)roximatcly ti8°' N; 138°4()' VV. (^ollfcting
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