Compilation
Cupressus thyoides

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Name

Identification
Cupressus thyoides L. [family CUPRESSACEAE ] (stored under name); Verified by Not on sheet, Chamaecyparis thyoides (L.) Britton & al. [family CUPRESSACEAE ] Verified by Not on sheet,
Related name
  • Thuja indet.
  • Cupressus thyoides
  • Chamaecyparis thyoides
Common name
  • southern white-cedar, Flora of North America Vol. 2
  • Atlantic white-cedar, Flora of North America Vol. 2

Flora

Entry for Chamaecyparis thyoides (Linnaeus) Britton, Sterns & Poggenburg [family CUPRESSACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 2,
Names
Chamaecyparis thyoides (Linnaeus) Britton, Sterns & Poggenburg [family CUPRESSACEAE], Prelim. Cat., 71. 1888
Cupressus thyoides Linnaeus [family CUPRESSACEAE], Sp. Pl., 2: 1003. 1753
Chamaecyparis henryae Li H. L. [family CUPRESSACEAE]
Chamaecyparis thyoides subsp. henryae (Li H. L.) E. Murray [family CUPRESSACEAE]
Chamaecyparis thyoides var. henryae (Li H. L.) Little [family CUPRESSACEAE]
Treatment Author(s)
David C. Michener
Information
Trees to 20(--28) m; trunk to 0.8(--1.5) m diam. Bark dark brownish red, less than 3 cm thick, irregularly furrowed and ridged. Branchlet sprays fan-shaped. Leaves of branchlets to 2 mm, apex acute to acuminate, bases of facial leaves often overlapped by apices of subtending facial leaves; glands usually present, circular. Pollen cones 2--4 mm, dark brown; pollen sacs yellow. Seed cones maturing and opening the first year, 4--9 mm broad, glaucous, bluish purple to reddish brown, not notably resinous; scales 5--7. Seeds 1--2 per scale, 2--3 mm, wing narrower than body.
Altitude range
0--500 m
Distribution
USA Ala.USA Conn.USA Del.USA Fla.USA Ga.USA MaineUSA Md.USA Mass.USA Miss.USA N.H.USA N.J.USA N.Y.USA N.C.USA Pa.USA R.I.USA S.C.USA Va.
Discussion
Li H. L. (1962) segregated some populations at the extreme southwestern limit of the species in Alabama, Florida, and Mississippi as Chamaecyparis henryae based on smoother bark, less flattened branchlets, lighter yellowish green foliage, steeper angle of leaf appression to the stem, more prominently keeled but less glandular leaves, and slightly larger cones, seeds, and seed wings. These features were contrasted with phenotypes found in the "northern and mid-Atlantic" populations, and Li proposed a relationship to C . nootkatensis rather than to C . thyoides . Preliminary comparison of herbarium material from the Southeast (including populations in Georgia and Florida) leads to retention of C . thyoides as a subtly variable complex with the imperfectly differentiated C . henryae at one end of the range.
A. J. Rehder (1949) listed, with bibliographic citations, 30 published varieties and forms best considered as cultivars.

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