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TAMARIX


T. parvifl ora. Zones 2–24. Native to southeastern Europe. Variable habit; typically a grace- ful, arching large shrub to 6– 15 ft. tall and wide. Profuse spring-only display of pink fl ow- ers that turn to tan, then brown. Prune to emphasize arching habit; or remove lower branches to achieve a treelike plant. An invasive pest plant in deserts, wetlands, and riparian habitats. Often sold as T. tetrandra; sold as T. africana in California.


Tanacetum


Asteraceae PERENNIALS


ZZONES VARY BY SPECIES FFULL SUN DO MODERATE TO REGULAR WATER


to 2–3 ft. high, 11⁄2 ft. wide, with very fi nely divided bright green leaves. Bears long-stemmed single daisies in pink, red, or white in spring; if cut back, may bloom again in late summer. Also available in double- and anemone-fl owered forms. Excel- lent for cutting, borders. Needs summer heat to perform well (except in the extreme heat of low and intermediate deserts, where it is treated as a winter annual). Sow seeds or divide clumps in spring. Double forms may not come true from sown seed, may revert to single fl owers. T. densum amani. Zones 3–24. Native to Turkey. Some- times sold as Chrysanthemum haradjanii. Low-growing (6–8 in. high) plant, spreading slowly to make a mat about 11⁄2 ft. wide. Leaves are fi nely cut, silvery white, featherlike in appear- ance. Small yellow fl ower heads appear a few inches above foli- age in late spring. Use in rock garden, as small-scale ground- cover in a bright, sunny area with good drainage. Can with- stand some dry spells when established. One of the whitest- looking plants. T. parthenium (Chrysan-


Tanacetum vulgare


Most species have fi nely divided leaves (often aromatic) and clusters of daisylike fl ower heads. Some have gray to nearly white foliage. T. balsamita (Chrysan-


T


themum balsamita). COST- MARY. Perennial. Zones 2–24. Native Europe to central Asia. Weedy, rhizomatous plant grown for its sweet-scented foliage (used in salads and sachets) rather than its tiny daisies. Leggy stems reach 3 ft. high; if these are cut back, the gray- green, fi nely scallop-margined basal leaves can make a nice edging for an herb garden. Divide clumps and reset divi- sions in late summer or fall. T. coccineum (Chrysan-


themum coccineum, Pyre- thrum roseum). PYRETHRUM, PAINTED DAISY. Perennial. Zones A1; 1–24. Native to Iran and the Caucasus. Bushy plant


themum parthenium). FEVERFEW. Perennial. Zones 2– 24. Native to southern Europe and the Caucasus. Compact, leafy, aggressive, spreading by volunteer seedlings. Leaves have a strong peppery scent that some people fi nd offen- sive. Attracts benefi cial insects. Varieties are 1–3 ft. high. ‘Golden Ball’ has bright yellow fl ower heads and no rays; ‘Silver Ball’ is fully double, with only the white rays showing. In ‘Aureum’ (commonly sold in fl ats as ‘Golden Feather’), char- treuse foliage is the main attraction. To propagate, divide the clumps in spring; or sow seeds in spring for bloom by midsummer. T. ptarmicifl orum (Chry-


santhemum ptarmicifl o- rum). DUSTY MILLER, SILVER LACE. Perennial in Zones 16, 17, 19–24; annual in Zones 1–15, 18. Canary Island native grows to 10 in. high and wide. Very fi nely cut, silvery white leaves. Where winter-hardy, pro- duces white daisies on 11⁄2-ft. stems in summer. Somewhat


drought-tolerant. (For other plants with the common name “dusty miller,” see the index.) T. vulgare. TANSY. Zones


1–24. Native to Europe. Coarse, rather weedy garden plant to 3 ft. high and 2 ft. wide, with fi nely divided, bright green, aro- matic (some say smelly) leaves. Small, buttonlike yellow fl owers appear in late summer. Thin clumps yearly to keep in bounds. This plant is no longer used medicinally, though it is still grown in herb gardens. T. v. crispum, fern-leaf tansy, grows to 21⁄2 ft. high; it has fi nely cut foliage and is more decorative than the species. ‘Isla Gold’ has golden yellow foliage.


Taxodium Taxodiaceae


DECIDUOUS AND EVERGREEN TREES


ZZONES VARY BY SPECIES FFULL SUN NDOWANY AMOUNT OF WATER


soil except strongly alkaline. Tolerates extremely wet condi- tions (even grows in swamps) but also takes rather dry soil. Trunk is buttressed near the base. When growing in water- logged soil, develops knobby growths called knees. No partic- ular pests or diseases bother it. Requires only corrective pruning to remove dead wood and unwanted branches. Outstand- ing tree for stream bank or edge of lake or pond. ‘Cascade Falls’ is a weeping form; grows quickly to 20 ft. tall and wide. ‘Shawnee Brave’ grows into a narrow pyramid just 15–20 ft. wide. ‘Green Whisper’ has very soft-textured, bright green foli- age. ‘Peve Minaret’ is a dwarf to 5 ft. tall forming a compact spire with tiered branches. T. mucronatum. MONTE- ZUMA CYPRESS. Evergreen in mild climates; partially or wholly deciduous in cold regions. Zones 5–9, 12–24. From Mex- ico. Given regular moisture, it quickly attains 40 ft. in 14 years, then grows at a more moderate rate to an eventual 75 ft. tall, 50 ft. wide. Under dry conditions, growth is uni- formly slow. Extremely graceful tree with strongly weeping branches. Foliage is fi ner in tex- ture, lighter in color than that of T. distichum; in colder part of range, it turns dull gold in autumn (color change and leaf drop both come very late). Beautiful tree for large lawns.


Taxodium distichum ‘Cascade Falls’


Very tough, tolerant conifers of great size, with shaggy, cinnamon-colored bark and graceful sprays of short, narrow, fl at, needlelike leaves. Small, roundish cones. T. distichum. BALD CYPRESS. Deciduous. Zones 2–10, 12–24. From southeast- ern U.S. Can grow into 100-ft.- tall, broad-topped tree in the wild, but young and middle-aged garden trees are pyramidal to 50–70 ft. tall, 20–30 ft. wide. Feathery, delicate foliage sprays with narrow leaves in a pale, delicate, yellow-tinged green. Foliage turns orange-toned brown before dropping. Interest- ing winter silhouette. Takes any


Bald cypress is among the few trees that can take constantly wet soil and periodic fl ooding. A few other members of the “wet-feet” club are red maple (Acer rubrum), alder (Alnus), river birch (Betula nigra), cajeput tree (Melaleuca quin- quenervia), swamp white oak (Quercus bicolor), and many willows (Salix).


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