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Helianthus laciniatus : ウィキペディア英語版 | Helianthus laciniatus
''Helianthus laciniatus'' is a North American species of sunflower known by the common name alkali sunflower. It is found in the southwestern United States (southeastern Arizona, southern New Mexico, western Texas)〔(Biota of North America Program 2014 county distribution map )〕 and north-central Mexico (Chihuahua, Coahuila, Nuevo León, Durango).〔(SEINet, Southwestern Biodiversity, Arizona Chapter, ''Helianthus laciniatus'' A. Gray ) photos, description, distribution map〕 It is fairly common in the Chihuahuan Desert.〔(Flora of North America, ''Helianthus laciniatus'' A. Gray )〕 ''Helianthus laciniatus'' is a perennial herb up to 200 cm (almost 7 feet) tall. Most of the leaves are on the stem rather than clumped together close to the ground, each leaf is up to 9 cm (2.7 inches) long. One plant usually produces 1-9 flower heads. Each head has with 14–20 yellow ray florets surrounding 40 or more red or purple disc florets. The plant grows in dry, alkaline desert soils.〔 ==References==
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