- Group 1Lycophytes, Monilophytes
- Group 2Gymnosperms
- Group 3Monocots
- Group 4Woody angiosperms with opposite or whorled leaves
- Group 5Woody angiosperms with alternate leaves
- Group 6Herbaceous angiosperms with inferior ovaries
- Group 7Herbaceous angiosperms with superior ovaries and zygomorphic flowers
- Group 8Herbaceous angiosperms with superior ovaries, actinomorphic flowers, and 2 or more distinct carpels
- Group 9Herbaceous angiosperms with superior ovaries, actinomorphic flowers, connate petals, and a solitary carpel or 2 or more connate carpels
- Group 10Herbaceous angiosperms with superior ovaries, actinomorphic flowers, distinct petals or the petals lacking, and 2 or more connate carpels
Reports of Forsythia ovata Nakai from New England are based on collections of F. suspensa; e.g., 29 Aug 1947, Bean s.n. ( NEBC!). Cultivated members of this genus were reported from RI by Kartesz (1999), based on George (1992); however, George (1999) stated they were not naturalized in RI.
1b. Calyx lobes 2–4.5 mm long; branchlets mostly ascending to arching; pith chambered though the internodes and chambered or solid at the nodes; leaf blades mostly cuneate to broad-cunate at the base, simple (sometimes 3-lobed in F. intermedia)
Show photos of: Each photo represents one species in this genus.