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CCDB → Angiosperms → Compositae → Symphyotrichum → Virgulus patens var. patens

Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
Virgulus patens var. patens	Symphyotrichum patens (Aiton) G. L. Nesom		20	IPCN online	Semple, J. C. 1984. Cytogeographic studies on North American Asters. I. Range surveys of Virgulus adnatus, V. concolor, V. georgianus, V. grandiflorus, V. novae-angliae, V. oblongifolius, V. patens and V. walteri. Amer. J. Bot. 71: 522–531.
Virgulus patens var. patens	Symphyotrichum patens (Aiton) G. L. Nesom		20	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.
Virgulus patens var. patens	Symphyotrichum patens (Aiton) G. L. Nesom		20	IPCN online	Semple, J. C., J. Zhang & C. Xiang. 1993. Chromosome number determinations in fam. Compositae, tribe Astereae. V. Eastern North American taxa. Rhodora 95: 234–253.