Distribution of Narrow-leaved Vervain (Verbena simplex) specimens in the ISM Herbarium |
Verbena simplex Records for Pope County, Illinois- ISM accession# 84060
- Collector: Koelling, Alfred C.
Date: 10 Jun 1970 - ISM accession# 99117
- Collector: Shildneck, Paul
Date: 23 Jul 1967 - ISM accession# 101038
- Collector: Shildneck, Paul
Date: 22 Jul 1967
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