Prof. Itay Mayrose Lab - Plant Evolution, bioinformatics, & comparative genomics


   CCDB is a community resource. If you are aware of any missing data or if any of the counts are erroneous please submit it to the forms submit new counts, or report erroneous counts.


CCDBAngiospermsCompositaeSymphyotrichumAster occidentalis (Nutt.) Torr. & A. Gray

13 chromosome counts in Aster occidentalis (Nutt.) Torr. & A. Gray:


Name Accepted Name Gametophytic(n) Sporophytic(2n) Data Source reference
  Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom 8, 6+1IV, 8+1B, 16+16+4B, etc. 16, 16+2-3B, 16+5-6B, 24, 32, etc. IPCN online Allred, K. W. & F. W. Gould. 1983. Systematics of the Bothriochloa saccharoides complex (Poaceae: Andropogoneae). Syst. Bot. 8(2): 168–184.
  Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom   16, 32, 64 IPCN online Semple, J. C. 1985. Chromosome number determinations in fam. Compositae tribe Astereae. Rhodora 87: 517–527.
  Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom   32 IPCN online Semple, J. C. & J. G. Chmielewski. 1987. Chromosome number determinations in fam. Compositae, tribe Astereae. II. Additional counts. Rhodora 89: 319–325.
  Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom   16 IPCN online Semple, J. C. 1983. Range expansion of Heterotheca camporum (Compositae: Asteraceae) in the southeastern United States. Brittonia 35(2): 140–146.
  Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom   16, 32, 64 IPCN online Semple, J. C. 1983. Range expansion of Heterotheca camporum (Compositae: Asteraceae) in the southeastern United States. Brittonia 35(2): 140–146.
  Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom 8II, 8II+5B, 16II+4B, etc 16+4B, ca. 32 IPCN online Dean, M. L. & K. L. Chambers. 1983. Chromosome numbers and evolutionary patterns in the Aster occidentalis (Asteraceae) polyploid complex of western North America. Brittonia 35: 189–196.
  Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom   16, 32, 40 IPCN online Semple, J. C., J. G. Chmielewski & M. E. Lane. 1989. Chromosome number determinations in fam. Compositae, tribe Astereae. III. Additional counts and comments on generic limits and ancestral base numbers. Rhodora 91: 296–314.
  Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom   16 IPCN online Semple, J. C., J. G. Chmielewski & C. Xiang. 1992. Chromosome number determinations in fam. Compositae, tribe Astereae. IV. Additional reports and comments on the cytogeography and status of some species of Aster and Solidago. Rhodora 94: 48–62.
  Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom 8   IPCN online Allen, G. A. & C. L. Eccleston. 1998. Genetic resemblance of allotetraploid Aster ascendens to its diploid progenitors Aster falcatus and Aster occidentalis. Canad. J. Bot. 76: 338–344.
!   Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom 8 8 IPCN67-71 SOLBRIG, Q.T., L.C. ANDERSON, D.W. KYHOS, & P.H. RAVEN. 1969. Chromosome numbers in Compositae. VIII: Astereae III. Amer. J. Bot. 56: 348-353.
!   Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom   16 IPCN73-74 KOVANDA, M. 1972. Somatic chromosome numbers for some Asteraceae. Rhodora 74: 102-116.
!   Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom   c.27 IPCN73-74 ANDERSON, L.C., D.W. KYHOS, T. MOSQUIN, A.M. POWEL~, & P.H. RAVEN. 1974. Chromosome numbers in Compositae. IX Haplopappus and other Astereae. Amer. J. Bot. 61: 665-671.
!   Aster occidentalis (Nutt.) Torr. & A. Gray Symphyotrichum spathulatum (Lindl.) G. L. Nesom   16 Cave1958 Huziwara 1958b