Abstract
Chromosome numbers are reported here for the first time from 117 individuals of Solidago rugosa and S. fistulosa. Including 178 previously published reports for the two species plus S. latissimifolia, chromosome numbers have been determined from 295 individuals from 269 locations. Only diploids (2n = 18) were found throughout the range of S. fistulosa on the coastal plain in the eastern U.S.A. (44 counts). Diploids (2n = 18) were found in the northern portion of the range of S. latissimifolia, and tetraploids (2n = 36) and hexaploids (2n = 54) were found in the central and southern portions of the range (nine counts in total). Diploids (2n = 18) were found throughout the range of S. rugosa in much of eastern North America in four of the five varieties (northern var. rugosa, var. sphagnophila; southern var. aspera and var. celtidifolia). Tetraploids (2n = 36) were found in all four of these varieties and exclusively in var. cronquistiana in the southern high Appalachian Mountains. Hexaploids (2n = 54) were found in var. sphagnophila at scattered locations. One possible hexaploid in var. rugosa was found in the Allegheny Mountains. The diversity in ploidy levels was independent of the size of the range and the diversity of growing conditions among the three species of S. subsect. Venosae.
Highlights
1993 [28]; Semple and Cook 2004 [29]; Semple et al 2015 [30]; Morton et al 2018 [31]; and Semple et al 2019 [32]), 295 individuals have had chromosome numbers determined from 270 locations in total for S. fistulosa, S. latissimifolia, and S. rugosa (Figures 1–3)
Tetraploids, and hexaploids encountered in the small sample of nine counts from nine locations from southern Nova Scotia to South Carolina; no counts have been reported from disjunct populations in peninsular Florida (Figure 2)
Solidago latissimifolia has the smallest range of the three species and occurs in ”fresh and brackish swamps, thickets on the outer coastal plain” at 0–80 m (Semple and Cook 2006 [10])
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Complex in the broad sense occurs in eastern North America and is a taxonomically difficult group of goldenrods making up Solidago subg. Don in Loudon) Nesom (Semple and Beck 2021 [1]). The subsection includes three closely related species, S. fistulosa
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
