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Family: acanthaceae
Common name(s): hairy wild petunia
Hardiness ratings: USDA zone 3~5 - 8~9 
General resources
Links for Ruellia humilis
- Carolina Nature - Photos of this native plant, often with notes on habitat and identification.
 (2 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 3-9) (14 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 5) (8 photos)
- Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations.
- Kansas Wildflowers & Grasses - Plant portrait with botanical details and description (11 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (30 photos)
- Missouri Botanical Garden - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 4-8) (8 photos)
- Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (11 photos)
- Ontario Rock Garden Society - Plant of the month profile (4 photos)
- Ontario Rock Garden Society - Germination information
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 4-8) (3 photos)
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