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Family: fabaceae
Common name(s): perennial sweet pea
Hardiness ratings: USDA zone 3~5 - 7~9 
General resources
Links for Lathyrus latifolius
- BBC Gardening: Lathyrus latifolius 'White Pearl' - Plant profile with horticultural details and garden uses. (more profiles for additional varieties)
 (1 photo)
- Climbers - Information page with most botanical details for this climbing species of the eastern US. (6 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 5-9) (22 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 5) (8 photos)
- Garden.org - Community-assembled plant profile (3 varieties in database) (12 photos)
- Heritage Perennials - Profile with description and horticultural details. (zone 3-9) (1 photo)
- Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations. (4 photos)
- Kansas Wildflowers & Grasses - Plant portrait with botanical details and description (8 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 3-8) (10 photos)
- Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (8 photos)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 4-8a) (3 photos)
- Ontario Rock Garden Society - Germination information (additional information for other varieties). Also a page for 'White Pearl'.
- Paghat's Garden - Illustrated articles by a gardener in the Pacific Northwest, with background and personal observations. (2 photos)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. (zone 3-7) (3 photos)
- Turner Photographics - Profile of wildflower of the US Pacific Northwest, with botanical description, habitat and distribution, and photo gallery.
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