Sunday, September 26, 2010

Old-Field-Tall Sunflower


Tall Sunflower

Order: Asterales

Family: Asteraceae

Genus: Helianthus

Species: H. giganteus

General Characteristics: As the name suggests, the giant sunflower is a large, showy plant. A tall, rough, reddish stem bearing several to many light yellow flower heads. The branched, purplish stem grows to 10 ft. tall and bears terminal, yellow flowers. Despite this plants names, its flower heads are comparatively small; the common and species names actually refer to the plants overall height.

Special Adaptations: The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and requires well-drained soil.The plant prefers acid, neutral and basic (alkaline) soils..It cannot grow in the shade.It requires moist soil.

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