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Dendrology Table 8.13
Comparison of native genera in the Cupressaceae
23
Environmental Studies
Undergraduate 4
10/16/2013

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Term
Sequoia (sequoia) leaves
Definition
alternate, linear, 3/8-3/4 in. (10-19mm) long, 2-ranked, juvenille scalelike, many-ranked; persistent
Term
Sequoiadendron (giant sequoia) Leaves
Definition
alternate, scalelike, 1/8-1/3 inches (3-6mm) long, many ranked, persistent
Term
Taxodium (baldcypress) leaves
Definition
alternate, linear, and 2-ranked, 3/8-5/8 inches (10-15mm) long; or subulate and many ranked, decidious
Term
Calocedrus (incense-cedar) leaves
Definition
opposite scales, decussate, appearing 4-whorled, persistent
Term
Thuja (thuja) leaves
Definition
opposite scales, decussate, persistent
Term
Cupressus (cypress)leaves
Definition
opposite scales, decussate, persistent
Term
Chamaecyparis (white-cedar) leaves
Definition
opposite scales, decussate, persistent
Term
Juniperus (juniper) leaves
Definition
dimorphic: opposite scales, decussate; or subulate and mostly ternate; persistent
Term
Sequoia (sequoia)branchlets
Definition
persistent, spreading
Term
Sequoiadendron (giant sequoia) branchlets
Definition
persistent, appressed to spreading
Term
Taxodium (baldcypress)branchlets
Definition
deciduous; horizontal with linear leaves or erect with subulate leaves
Term
Calocedrus (incense-cedar) branchlets
Definition
persistent, flattened
Term
Thuja (thuja) branchlets
Definition
persistent flattened
Term
Cupressus (cypress)
Definition
persistent flattened
Term
Juniperus (juniper)
Definition
persistent, spreading
Term
Sequoia (sequoia) seed cones
Definition
elliptical to subglobose, 1/2-1 1&1/8 in (1.2-3cm) long, remaining intact at maturity; seeds with 2 lateral wings
Term
Sequoiadendron (giant sequoia) seed cones
Definition
ovoid or oblong, 1&3/4-2$3/4 in (4.5-7cm) long, remaining intact at maturity; seeds with 2 lateral wings
Term
Taxodium (baldcypress) seed cones
Definition
globose, 3/4-1 inch (2-2.5cm) diameter, shattering at maturity; seeds triangular, +/- winged at the angles
Term
Calocedrus (incense-cedar) seed cones
Definition
oblong, 3/4-1 inch (2-2.5 cm) long, with 6 thin, flattened, woody scales; seed with 2 unequal wings
Term
Thuja (thuja) seed cones
Definition
elliptical, ca. 1/2 inches (12mm) long, with 8-12 thin, woody scales; seeds with 2 lateral equal wings
Term
Cupressus (cypress) seed cones
Definition
globose, 3/4-1%3/8 inches (2-3.5 cm) diameter, with 6-12 leathery, peltate scales; seeds laterally winged; maturing in 2 years
Term
Chamaecyparis (white-cedar) seed cones
Definition
globose, 1/4-1/2 inches (6-12mm) diameter, with 4-8 leather or dry, peltate scales; seeds laterally winged; maturing in 1 year
Term
Juniperus (juniper) seed cones
Definition
globose, 1/4-5/8 inches (6-15mm) diameter, with 3-8 fleshy, peltate scales, fused into berry-like cone; seeds wingless
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