1. Oligoron longifolium var. hirsutum Raf.

    1. This is a synonym of Asclepias hirtella (Pennell) Woodson

Oligoron longifolium var. hirsutum Raf. appears in other Kew resources:

First published in New Fl. 4: 60 (1838)

Sources

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0