G. Hansen

14 plates

• Soliva daucifolia Nutt. 18 Apr 1895
• Centaurea melitensis L. 2 Sep 1895
• Silybum marianum (L.) Gaertn. 21 Jul 1893
• Leucanthemum vulgare Lam. 13 Jul 1896
• Achillea lanulosa Nutt. 30 Jul 1896
• Artemisia douglasiana Besser ex Hook. 12 Apr 1896 to 10 Sep 1896
• Cirsium occidentale var. californicum (A. Gray) D.J. Keil & C.E. Turner 7 Jul 1896
• Artemisia ludoviciana subsp. incompta (Nutt.) D.D. Keck 3 Oct 1893
• Blennosperma nanum (Hook.) S.F. Blake 11 Apr 1896
• Cotula coronopifolia L. 1 May 1896
• Achillea californica Pollard 28 Jul 1895
• Anthemis cotula L. 10 Aug 1895
• Matricaria matricarioides (Less.) Porter 20 Apr 1896
• Helenium pinnatifidum (Schwein. ex Nutt.) Rydb. 2 Jun 1894