Difference between revisions of "Pseudotsuga"
Traité Gén. Conif., ed. 2 256. 1867.
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|discussion=<p>Species 5 (2 in the flora).</p> | |discussion=<p>Species 5 (2 in the flora).</p> | ||
|tables= | |tables= | ||
| − | |references= | + | |references={{Treatment/Reference |
| + | |id=flous1937a | ||
| + | |text=Flous, F. 1937. Révision du genre Pseudotsuga. Bull. Soc. Hist. Nat. Toulouse 71: 33--164. | ||
| + | }}{{Treatment/Reference | ||
| + | |id=little1952a | ||
| + | |text=Little, E.L. Jr. 1952. The genus Pseudotsuga (Douglas-fir) in North America. Leafl. W. Bot. 6: 181--198. | ||
| + | }} | ||
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|family=Pinaceae | |family=Pinaceae | ||
|distribution=North America;3 in e Asia. | |distribution=North America;3 in e Asia. | ||
| − | |reference= | + | |reference=flous1937a;little1952a |
|publication title=Traité Gén. Conif., ed. 2 | |publication title=Traité Gén. Conif., ed. 2 | ||
|publication year=1867 | |publication year=1867 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V2/V2_621.xml |
|genus=Pseudotsuga | |genus=Pseudotsuga | ||
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-->[[Category:Treatment]][[Category:Pinaceae]] | -->[[Category:Treatment]][[Category:Pinaceae]] | ||
Revision as of 20:51, 16 December 2019
Trees conic, evergreen. Bark initially smooth, with resin blisters; in age reddish brown, corky, furrowed. Branches often pendulous, irregularly whorled; short (spur) shoots absent; leaf scars transversely elliptic, slightly raised proximally but essentially flush with twig distally. Buds elongate, not resinous, apex acute. Leaves borne singly, persisting 6–8 years, alternate, short-stalked, flattened; resin canals 2, marginal. Cones borne on year-old twigs. Pollen cones axillary. Seed cones maturing first season, shed whole, deflexed or pendent, ellipsoid, ovoid, or cylindric, nearly sessile, lacking apophysis and umbo; scales persistent, apex rounded; bracts ± exserted, apex 3-lobed, lobes with acute apices, central lobe narrow, longer than lateral lobes. Seeds winged; cotyledons 6–12. x =12, 13.
Distribution
North America, 3 in e Asia.
Discussion
Species 5 (2 in the flora).
Selected References
Lower Taxa
Key
| 1 | Leaf apex mucronulate; seed cones 9-20 cm; sw California. | Pseudotsuga macrocarpa |
| 1 | Leaf apex obtuse to acute; seed cones 4-10 cm; widely distributed in w North America. | Pseudotsuga menziesii |