Sequoiadendron giganteum 'Glaucum'

• Interesting Facts
• Common Names
• Description
• Biology
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Interesting Facts

Common Names

Description

Family Cupressaceae

Trees or shrubs evergreen , monoecious or dioecious. Leaves decussate or in whorls of 3, scalelike and then often dimorphic with flattened facial leaves and keeled lateral leaves, or needlelike particularly in juvenile plants , often with an abaxial resin gland . Pollen cones terminal or axillary , solitary, maturing and shed annually; microsporophylls 6-16, decussate or whorled , each bearing (2 or) 3-6(-9) pollen sacs ; pollen wingless. Seed cones usually terminal, solitary, globose , ovoid , or oblong , dehiscent or indehiscent when mature in 1st or 2nd(or 3rd) year; cone scales developing after ovules originate in bract axils; bracts almost completely enveloped by cone scales, free only at apex; ovules 1-numerous per bract axil, erect ; cone scales of mature cones 3-16, flat or peltate, woody, leathery, or succulent, 1-20-seeded. Seeds winged or not; wings derived from seed coat . Cotyledons usually 2, rarely 3-6. Germination epigeal.

Nineteen genera and ca. 125 species: worldwide; eight genera (one introduced ) and 46 species (16 endemic, 13 introduced) in China.[1]

Genus Sequoiadendron

Trees giant, evergreen . Branchlets terete . Leaves alternate, radiating. Adult leaves mostly needlelike, triangular in cross section , somewhat divergent to strongly appressed ; abaxial glands absent. Pollen cones with 12--20 sporophylls, each sporophyll with 2--5 pollen sacs . Seed cones maturing and opening in 2 years, persistent to 20 years, oblong ; scales persistent, 25--45, valvate , ± peltate, thick and woody. Seeds 3--9 per scale, lenticular , subequally 2-winged; cotyledons (3--) 4(--6). x = 11.

Species 1: only in the flora .[2]

Physical Description

Biology

Growth

Culture: Space over 40' apart.

Soil: Minimum pH: 5.6 • Maximum pH: 7.5

Sunlight: Sun Exposure: Sun to Partial Shade.

Temperature: Cold Hardiness: 6a, 6b, 7a, 7b, 8a, 8b. (map)

Taxonomy

Notes

A tentatively accepted name in the RHS Horticultural Database.

Similar Species

Members of the genus Sequoiadendron

ZipcodeZoo has pages for 4 species, subspecies, varieties, forms, and cultivars in this genus:

S. gigantea (Bigtree) · S. giganteum (Giant Sequoia) · S. giganteum 'Glaucum' (Big Tree) · S. giganteum 'Powder Blue' (Big Tree)

More Info

• Search for Pictures: images.google.com
• Search for Scholarly Articles: Google Scholar
• Search using Scientific Name and Vernacular Names: All the Web | AltaVista Canada | AltaVista | Excite | Google | HotBot | Lycos
• Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books

Further Reading

• Wang Wen-tsai, Cheng Wan-chün, Fu Li-kuo & Chu Cheng-de. 1978. Cupressaceae. In: Cheng Wan-chün & Fu Li-kuo, eds., Fl. Reipubl. Popularis Sin. 7: 313-398.
• Tsui Hung-pin, Cheng Wan-chün, Fu Li-kuo & Chao Chi-son. 1978. Taxodiaceae. In: Cheng Wan-chün & Fu Li-kuo, eds., Fl. Reipubl. Popularis Sin. 7: 281-312.

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 15, 2012.

Identifiers

• Zipcode Zoo Species Identifier: 892678

Footnotes

1. Liguo Fu, Yong-fu Yu, Robert P. Adams & Aljos Farjon "Cupressaceae". in Flora of China Vol. 4 Page 62. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
2. Frank D. Watson "Sequoiadendron". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]

©2004-2012 David Stang. All rights reserved.