Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 6b-10) (2 photos)
Garden.org - Community-assembled plant profile (1 photo). Also a page for 'Monon'.
Missouri Botanical Garden: Pyracantha angustifolia 'Gnome' - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 5-9) (1 photo)