PlantsHelianthus→Stiff Sunflower (Helianthus pauciflorus subsp. pauciflorus)

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 9b
Plant Height: 12 - 48 inches
Plant Spread: 12 - 18 inches
Fruit: Edible to birds
Flowers: Showy
Flower Color: Yellow
Bloom Size: 1"-2"
Flower Time: Summer
Late summer or early fall
Underground structures: Rhizome
Uses: Will Naturalize
Edible Parts: Fruit
Wildlife Attractant: Bees
Birds
Containers: Not suitable for containers

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Comments:
Posted by KentPfeiffer (Southeast Nebraska - Zone 5b) on Jun 17, 2012 12:29 PM

The two subspecies of Stiff Sunflower are pretty easy to tell apart. The leaves of Helianthus pauciflorus subsp. pauciflorus are narrowly ovate whereas the other subspecies has diamond shaped leaves.

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