Difference between revisions of "Tanacetum"

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Tanacetum (name of doubtful derivation). Compositae. Annual or perennial herbs which are odorous: lvs. alternate, variously cut: heads of small to medium-sized yellow fls. disposed in corymbs, or rarely solitary, heterogamous, disk-shaped; female fls. with 3-5- toothed, tubular corollas: achenes 5-ribbed or 3-5- angular, with a broad truncate summit, bearing a coroniform pappus or none.—Thirty-five species scattered about the northern hemisphere, of which about 7 are native to N. Amer. For cult., see Tansy.
 
Tanacetum (name of doubtful derivation). Compositae. Annual or perennial herbs which are odorous: lvs. alternate, variously cut: heads of small to medium-sized yellow fls. disposed in corymbs, or rarely solitary, heterogamous, disk-shaped; female fls. with 3-5- toothed, tubular corollas: achenes 5-ribbed or 3-5- angular, with a broad truncate summit, bearing a coroniform pappus or none.—Thirty-five species scattered about the northern hemisphere, of which about 7 are native to N. Amer. For cult., see Tansy.
  
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Revision as of 05:35, 10 December 2009


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Plant Characteristics
Cultivation
Scientific Names

Tanacetum >



Read about Tanacetum in the Standard Cyclopedia of Horticulture 

Pyrethrum (a name used from the time of Dioscorides, the derivation from the Greek, much fire, referring to the acrid roots). Compositae. This name is still commonly used in garden literature and language although the genus has long been reduced to a section of Chrysanthemum. Almost every nursery catalogue offers P. roseum and its numerous varieties, which is referred by botanists to Chrysanthemum coccineum; also P. parthenifolium var. aureum, the golden feather, and P. uliginosum. (See Vol. II, p. 753.) All three of these are rather common in gardens and they are known to most lovers of hardy perennials. More recent introductions under the name Pyrethrum are P. Tchihatchewii, also spelled Tchihatcheffii, the "turfing daisy" (see Chrysanthemum Tchihatchewii, Vol. II, p. 756), and P. leucopiloides, Hausskn., a sub-alpine perennial with silvery white leaves and large yellow flower-heads. Asia Minor. Suitable for the rockery. This last species is not mentioned under Chrysanthemum.


The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.



Read about Tanacetum in the Standard Cyclopedia of Horticulture 

Tanacetum (name of doubtful derivation). Compositae. Annual or perennial herbs which are odorous: lvs. alternate, variously cut: heads of small to medium-sized yellow fls. disposed in corymbs, or rarely solitary, heterogamous, disk-shaped; female fls. with 3-5- toothed, tubular corollas: achenes 5-ribbed or 3-5- angular, with a broad truncate summit, bearing a coroniform pappus or none.—Thirty-five species scattered about the northern hemisphere, of which about 7 are native to N. Amer. For cult., see Tansy.

T. adenanthum, Diels. Plant densely tufted, 6-12 in. high: lvs. finely divided, clothed with white silky hairs: fl.-heads about 1/4 in. across. W. China.—T. quercifolium, W. W Smith. Lower lvs. 4-6 in. long: fl.-heads containing about 20 yellow florets. Yunnan. CH


The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.


Cultivation

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Species

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