San Francisco Bay Area Plant Encyclopedia
- Rhipsalis pacheco-leonis ssp. catenulata
- Rhipsalis pachyptera
- Rhipsalis pilocarpa
- Rhipsalis platycarpa
- Rhipsalis pulchra
- Rhipsalis sulcata
- Rhipsalis teres
- Rhipsalis teres fa. prismatica
- Rhodochiton atrosanguineum
- Rhombophyllum dolabriforme
- Rhombophyllum nelii
- Rhytidocaulon macrolobum ssp. macrolobum
- Ribes aureum
- Ribes aureum v. gracillimum
- Ribes “Barrie Coate”
- Ribes “Christy Ridge”
- Ribes “Claremont”
- Ribes “Dancing Tassels”
- Ribes indecorum
- Ribes malvaceum
- Ribes nevadense
- Ribes “Ortega Beauty”
- Ribes roezlii var. cruentum
- Ribes sanguineum
- Ribes speciosum
- Ribes “Spring Showers”
- Ribes viburnifolium
- Ribes “White Icicle”
- Romneya coulteri
- Rosa minutifolia