Canada's Plant Hardiness Site

Asteraceae daisy family
Helianthus nuttallii subsp. rydbergii (Britton) R.W. Long
En: Rydberg's sunflower;
Fr: helianthe de Rydberg

• [=Helianthus nuttallii Torr. & A.Gray var. rydbergii (Britton) B.Boivin]
• [=Helianthus rydbergii Britton - basionym]
• [=Helianthus subtuberosus (Britton) Britton var. rydbergii (Britton) B.Boivin]