Revision of Trillium subgenus Phyllantherum (Liliaceae)
Freeman JD. 1975. Revision of Trillium subgenus Phyllantherum (Liliaceae). Brittonia. 27(1):1 - 62
The paper describes the 22 species in the taxa and offers a key. Five new species are described, as are six new color forms. A taxonomic revision, based mainly on morphological and distributional criteria, is presented for all taxa of Trillium subgen. Phyllantherum Raf., which is characterized by sessile flowers. The 22 species recognized as valid include 17 morpho-geographical species in the eastern United States and five in the northwestern United States and California. These species form three morphological alliances that are characterized informally as "species groups." All the taxa are described, and a key to species and varieties is provided. Five new species are described: Trillium decipiens, T. reliquum, T. foetidissimum, T. albidum, and T. kurabayashii; and a new status, T. angustipetalum (Torrey) Freeman, based on T. sessile var. angustipetalum Torrey, is proposed. Six new flower color forms are described: T. reliquum f. luteum, T. stamineum f. luteum, T. maculatum f. luteum, T. maculatum f. simulans, T. foetidissimum f. luteum, and T. cuneatum f. luteum. County distribution maps are included for all species and varieties, and an annotated synonymy is presented for each taxon.
- Type
- Journal Article
- Authors
- Freeman, John
- Units
- GRSM
- Keywords
- Great Smoky Mountains National Park NC TN, Liliaceae, Plant Studies, Species Identification, trillium