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Picea
Family: Pinaceae
Picea image
Max Licher
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Ronald J. Taylor from Flora of North America (vol. 2)
Trees evergreen; crown broadly conic to spirelike; leading shoot erect. Bark gray to reddish brown, thin and scaly (with thin plates), sometimes with resin blisters (especially in Picea engelmannii and P . glauca ), becoming relatively thick and furrowed with age. Branches whorled; short (spur) shoots absent; twigs roughened by persistent leaf bases. Buds ovoid, apex rounded to acute, sometimes resinous. Leaves borne singly, spreading in all directions from twigs, persisting to 10 years, mostly 4-angled and square in cross section (to triangular or ± flattened), mostly rigid, sessile on peglike base; base decurrent, persistent after leaves shed, sheath absent; apex usually sharp-pointed, sometimes bluntly acute; resin canals 1--2. Cones borne on year-old twigs. Pollen cones grouped, axillary, oblong, yellow to purple. Seed cones maturing in 1 season, usually shed at maturity (persisting for several years in Picea mariana ), borne mostly on upper branches, pendent, ovoid to cylindric, sessile or terminal on leafy branchlets and thus appearing ± stalked; scales persistent, elliptic to fan-shaped, thin, lacking apophysis and umbo; bracts included. Seeds winged; cotyledons 5--l5. x =12.
Vascular plants of NE US and adjacent Canada
Male and female cones terminating twigs of the previous year's growth; female cones pendulous, with persistent scales much exceeding the bracts; evergreen trees, the quadrangular lvs jointed at the base to a short, projecting sterigma that persists on the denuded branch; resin-ducts 2 in each lf; 2n=24. 30+, N. Temp

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
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Picea abies
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Picea alba
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Picea alcoquiana
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Picea asperata
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Picea aurantiaca
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Picea australis
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Picea austropanlanica
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Picea brachytyla
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Picea brevifolia
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Picea breweriana
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Picea chihuahuana
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Picea engelmannii
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Picea excelsa
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Picea glauca
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Picea glehnii
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Picea jezoensis
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Picea koraiensis
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Picea koyamae
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Picea likiangensis
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Picea linzhiensis
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Picea lutzii
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Picea mariana
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Picea martinezii
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Picea maximowiczii
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Picea meyeri
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Picea morrisonicola
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Picea neoveitchii
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Picea nigra
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Picea obovata
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Picea omorika
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Picea orientalis
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Picea pungens
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Picea retroflexa
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Picea rubens
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Picea schrenkiana
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Picea sitchensis
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Picea smithiana
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Picea spinulosa
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Picea torano
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Picea wilsonii
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Picea x albertiana
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Picea x lutzii
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The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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