Studies in the Agalinanae, a Subtribe of the Rhinanthaceae
- F. W. Pennell
- Biology
- 1 March 1913
Scrophulariaceae of the Northwestern United States-II. Pedicularis of the Group Bracteosae
- F. W. Pennell
- Medicine
- 1 November 1934
A Second Summary of the Scrophulariaceae of New Guinea
- F. W. Pennell
- MedicineJournal of the Arnold Arboretum
- 1943
Notes on Plants of the Southern United States-III
- F. W. Pennell
- Environmental Science
- 1 February 1916
Scrophulariaceae of the local flora
- F. W. Pennell
- History
the plants first known in detail, if not necessarily those earliest discovered, on this continent. From Massachusetts to Carolina we are on classic ground, and here the plant-life has been worked…
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