Taxonomy of Cordylanthus Subgenus Hemistegia (Scrophulariaceae)
Chuang TI and Heckard LR. 1973. Taxonomy of Cordylanthus Subgenus Hemistegia (Scrophulariaceae). Brittonia. 25(2):135-158
A taxonomic revision of Cordylanthus subg. Hemistegia based on evidence from morphology, chromosome numbers, habitat, ecology, and geographic distribution is presented, recognizing four species and five subspecies. Three new combinations on the subspecific level are proposed. The first chromosome counts for subg. Hemistegia are reported with haploid numbers of n=14, 15, and 21. Each species is illustrated with line drawings showing habit and floral morphology; distribution maps indicate sites of known populations. The possible extinction of C. mollis ssp. mollis and C. palmatus is discussed, and the urgent need for preservation of their saline and alkaline habitats is emphasized.
- Type
- Journal Article
- Authors
- Chuang, Tsan; Heckard, Lawrence
- Units
- DEVA
- Keywords
- Absence (Biodiversity), chromosome numbers, Distribution (Biodiversity), Geographic Distribution, halophytic habitat, Morphology, Plant Studies, Presence (Biodiversity), Taxa Links To Datasets, Taxa Links To References