Sunflower; Runyon’s Premature Sunflower

Helianthus praecox runyonii

Family: Asteraceae

Plant Description: Annual to 1 m high with triangular -ovate leaves 3-7 cm long. Heads solitary, 4.5-6 cm wide. Disks brown or purplish. Rays yellow to orange

Plant Trivia:

Field Identification:

Occurrence: Frequent on sand in pastures, woods, prairies, old fields, and waste plaes and along roads.

Bloom Period: April-December

Plant Use:

Key to species of Helianthus:

  1. Leaves opposite……………………………………………………………………………….H. ciliaris

Leaves partly or all alternate……………………………………………………………………….2

2. Leaves white-wooly………………………………………………………………..H. argophyllus

Leaves not white-wooly………………………………………………………………………………..3

3. Outer phyllaries ovate, abruptly pointed……………………. …………...H. annuus

Outer phyllaries lanceolate, tapered to a point………………………………………..4

4. Base of leaves cuneate, grossly serrate…………………………..H. grosseserratus

Base of leaves cordate, irregularly serrate…………………..H. praecox runonii