Close-up View of the Sweet Pea
- Photographic study by Brian Johnston of Lathyrus latifolia, with many fine images, both macroscopic and microscopic.
- http://www.microscopy-uk.org.uk/mag/artjul06/bj-sweetpea.html

Lathyrus montanus
- Two photographs of Bitter Vetchling and its brief description.
- http://www.plant-identification.co.uk/skye/leguminosae/lathyrus-montanus.htm

Lathyrus pratensis
- Two photographs of Meadow Vetchling, its flowers, leaves and pods, and its brief description.
- http://www.plant-identification.co.uk/skye/leguminosae/lathyrus-pratensis.htm

Species Plantarum
- The section on the genus Lathyrus from Linnaeus' Species Plantarum of 1753, from botanicus.
- http://www.botanicus.org/page/358750

South American Lathyrus
- Report on a collecting and herbarium based field trip to Argentina for a revision of the taxonomy of the section Notolathyrus.
- http://student.biology.ed.ac.uk/general/awards/reports/2004_davis/Davis-Report-Kenicer.pdf

Species in GRIN for Genus Lathyrus
- Taxonomy and synonymy for the genus Lathyrus in the Germplasm Resources Information Network of the USDA.
- http://www.ars-grin.gov/cgi-bin/npgs/html/splist.pl?6554