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Glauca: Answers to key questions
leading to this species.
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Seed cones ovoid-oblong, deciduous,
falling the first winter, 2.5-6 (7) cm long; seed cone scales 10-16 mm
long, margin near apex +/- entire; needles (0.8) 1.5-2 (2.5) cm long,
mostly sharp-pointed, glaucous, green or blue-green; twigs and bud
scales glabrous. NOT [Seed cones ovoid-subglobose, persisting on
tree for several years, 1.5-2.5 (3.5) cm long; seed cone scales 8-12 mm
long, margin at apex irregularly toothed; needles 0.6-1.5 (2) cm long,
mostly blunt-tipped, glaucous, blue- to grey-green; twigs and bud scales
puberulent.]
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Picea: Answers to key questions
leading to this genus.
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Needles
borne singly along branches, not in fascicles scaly-sheathed at base or
on short shoots. NOT [Needles on year-old and older
branches borne either in groups (fascicles) of 2 with each fascicle
scaly-sheathed at base at least when young, or in clusters of 12-25 on
short shoots with clusters not scaly sheathed.] |
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Needles 4-angled in cross-section, either
sharp-pointed or blunt-tipped, rigid; seed cones falling as a unit, not
disintegrating by shedding scales individually from cone axis; twigs
conspicuously roughened by decurrent, spreading or appressed, peg-like
projections (pulvini) persisting after needles fall. NOT [ Needles
flattened, frequently grooved adaxially, usually rounded or notched at
apex, flexible; seed-cones not falling whole but scale by scale, leaving
naked cone axes persisting as erect "spikes" on branches;
twigs not roughened by decurrent, projecting, peg-like leaf-bases.] |
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