Western Yarrow. Achillea millefolium var. lanulosa, Sunflower Family: ( Asteraceae ) , Western Yarrow. Also called: milfoil, thousandleaf, soldier�s woundwort, bloodwort, nose bleed, devil�s nettle, sanguinary, old-man�s-pepper, and stenchgrass. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. Western Yarrow's finely dissected green leaves form a dense mat, the flowers rise up on 12 - 24 inch stalks. The flowers have a wonderful crinkled look. The leaves have medicinal properties. A delightful, perennial, which forms a bouquet of white flowers! It's a native of the continental USA and a native to Arizona that blooms from March to November, and it qualifies as a low water use plant. Plants spread aggressively by rhizomes and self-seeding, and can naturalize into substantial colonies if left unchecked. Quick Notes: Height: Up to 2 feet tall. Spreads up to 18 inches wide. Flowers: 4 - 6 inch flower heads which are on slender stalks. The flowers are small, about a quarter inch in diameter, and are composed of four to six, but usually five, ray flowers, generally more wide than long with three teeth at their tips. The ray flowers encircle lots of little disk flowers. Flowering Time: Late March - November. Leaves: Finely, deeply, dissected, fern-like, aromatic, green leaves about 2 - 5 inches long. Found: Native of the USA (AK, AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY). Native of Canada in (AB, BC, LB, MB, NB, NF, NS, NT, NU, ON, PE, QC, SK, YT). Also found in Northern Mexico in northern Sonora, northern Chihuahua, Baja Norte, Baja California, & Coahuila. Also found in Denmark (GL), & France (SPM). Hardiness: USDA Zone 3a: to -39.9 �C (-40 �F) USDA Zone 3b: to -37.2 �C (-35 �F) USDA Zone 4a: to -34.4 �C (-30 �F) USDA Zone 4b: to -31.6 �C (-25 �F) USDA Zone 5a: to -28.8 �C (-20 �F) USDA Zone 5b: to -26.1 �C (-15 �F) USDA Zone 6a: to -23.3 �C (-10 �F) USDA Zone 6b: to -20.5 �C (-5 �F) USDA Zone 7a: to -17.7 �C (0 �F) USDA Zone 7b: to -14.9 �C (5 �F) USDA Zone 8a: to -12.2 �C (10 �F) USDA Zone 8b: to -9.4 �C (15 �F) Soil pH requirements: 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) Sun Exposure: Full Sun Elevation: 4,500 - 11,500 feet. Habitat: Desert soil, rock, does well in loose soil on slopes. Miscellaneous: Flowering Photos Taken September 30, 2006. Yarnell Arizona. And July 29, 2009. Blue Ridge Lake or Reservoir, Arizona Located at 6,604 feet, in the Coconino National Forest on the Mogollon Rim near Payson, Arizona.

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