Each flower and tree is interesting to see ~ watch closely as each unfolds.
 

Achillea (Yarrow)
A drought tolerant perennial herb native to Europe, it has naturalized throughout temperate North America. The species name, millefolium -of a thousand leaves- describes the fine, feathery foliage which resembles a fern. Flowers are in clusters forming a flat top usually affixed to a single stem. Yarrow can endure dry, impoverished soil and survive with little maintenance. Requires full sun. A true perennial taking two years to become established.
1-3ft high - one of the most popular of herbs for use in herbal medicine, many herbalists consider that if they were forced to choose only one native plant to use for multi purposes, it would be yarrow - contains the alkaloid achilleine; occasionally used in present times to stop a menstrual cycle - crushed roots were put on teeth to help toothaches, a tea from the leaves and stems was used to bathe in for those suffering from rheumatism, an astringent or tonic was also made from the yarrow - to stop sore throats a concoction of all but the roots was gargled

CULTIVATION: Average to poor or loamy, dry to semi moist, well drained soil in full sun.
PROPAGATION: Divide spring or fall. Basal cuttings in spring.
PESTS AND DISEASES: I have not seen any problems in 3 years.

A. 'millefolium'
Love the color and look of this one - Long lasting in the vase and on the plant. No pests or care (division). De-Head spent flowers if you like.

Zone: 3 - 9    -    H 9 - 1	Sun
Height: 18-36 inches	Spread: 12-16 inches
Bloom Time: Mid May to fall	Bloom Color: Deep Red