CHROMOSOMAL RELATIONSHIPS AND TAXONOMIC CONSIDERATIONS IN THE GENUS CASSIA
Abstract
Irwin, H. S. and B. L. Turner. (U. Texas, Austin.) Chromosomal relationships and taxonomic considerations in the genus Cassia. Amer. Jour. Bot. 47(4): 309‐318. 1960.—All chromosome numbers known for the genus Cassia are arranged in a table which follows the infrageneric organization of Bentham (1871). Included are new counts for 88 taxa, of which 68 are first reports. Evidence is represented which suggests that the base number for the genus is 7, the other numbers having been derived by aneuploid loss from various euploid levels. The basic number 8, of general occurrence in the Subsection Leiocalyx, Section Chameacrista, is presumed to have been derived from the ancestral generic base by aneuploid gain of 1 chromosome. The results of the present study do not support elevation of the section Chamaecrista to generic rank. In general, the basic soundness of Bentham's revision is upheld.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 1960
- Source ID
- 10.1002/j.1537-2197.1960.tb07130.x
Entities
People
- B. L. Turner
- H. S. Irwin
Organizations
- Office of Naval Research
- University of Texas at Austin