Penstemon arkansanus var. pubescens Pennell Proc. Acad. Nat. Sci. Philadelphia 73: 494 (1921 publ. 1922)

Nomenclatural References

• literature : Proc. Acad. Nat. Sci. Philadelphia 73: 494. 1922 BHL link from IPNI metadata.
• person : Francis W. Pennell (1886-1952) Based on occurrence of standard abbreviation 'Pennell' in the authors string.
• database : IPNI record: 187164-2