36 A. W. Evans — North American Species of Frullania. 



EXPLANATION OF PLATES. 



Each species is represented in natural size and with enlarged details : in Plates I 

 and IX-XIV, the leaf-cells are enlarged 255, and the other details 28 diameters; in 

 Plates II-VIII and XV, the leaf-cells are enlarged 290, and the other details 32 

 diameters. 



•Plate I. 



Frullania arietina Tayl. — Fig. 1. Plant, natural size. — Fig. 2. Part of plant, postical 

 view, showing perianth and hypogynous perigonial bracts. — Fig. 3. Leaf-cells 

 from middle of lobe. — Fig. 4. Bracts and connate bracteole I. — Fig. 5. Bracts and 

 connate bracteole IL — Fig. 6. Transverse section of perianth. All the figures 

 from Florida specimens collected by Mr. Smith. 



Frullania Oakesiana Aust. — Fig. 7. Plant, natural size. — Fig. 8. Part of plant, postical 

 view, showing perianth and androecium. — Fig. 9. Part of stem with leaf, antical 

 view. — Fig. 10. Leaf-cells from middle of lobe. — Fig. 11. Bract and connate 

 bracteole I— Fig. 12. Bract I.— Fig. 13. Bract II.— Fig. 14. Bracteole II.— Fig. 

 15. Transverse section of perianth. All the figures from specimens collected by 

 the author on Carter Dome, New Hampshire. 

 9 



Plate II. 



Fi'ullania Bolanderi Aust. — Fig. 1 Plants, natural size,— Fig. 2. Part of pl^nt, postical 

 view, showing perianth. — Fig. 3. Part of plant, postical view. — Fig. 4. Part of 

 branch, ending in a flagellum. — Fig. 5. Part of stem, antical view. — Fig. 6. Leaf, 

 cells from middle of lobe. — Fig. 7. Bracts with connate bracteole I. — Fig. 8. Bract 

 and connate bracteole I. — Fig. 9. Same, from another involucre. — Fig. 10. Bract 

 and connate bracteole II, from same involucre as Fig. 9. — Fig. 11. Bract and 

 connate bracteole I. — Fig. 12. Bract I. — Fig. 13. Bract and connate bracteole II. 

 — Fig. 14. Bract II. — Fig. 15. Transverse section of perianth. Figs. 1-3 and 5- 

 8 from Californian specimens collected by Mr. Howe; Figs. 4, 9 and 10 from 

 British Columbian specimens collected by Professor Macoun ; and Figs. 11-15 

 from Californian specimens collected by Bolander. 



Plate III. 



Frullania inflata Gottsche. — Fig. 1. Plant, natural size. — Fig. 2. Part of plant, postical 

 view, showing perianth and androecium. — Fig. 3. Part of plant, postical view. — 

 Fig. 4. Part of stem, antical view. — Fig. 5. Leaf-cells from middle of lobe. — Figs. 

 6, 7. Bracts L— Fig. 8. Bracteole I.— Fig. 9, Bract II.— Fig. 10. Bracteole IL— 

 Figs. 11, 12. Transverse sections of perianths. — Fig. 13. Bract I. — Fig. 14. 

 Bracteole I. — Fig. 15. Bract II. — Fig. 16. Bracteole IL— Figs. 17, 18. Transverse 

 sections of perianths. Figs. 1, 3, 4, and 6-12 from specimens collected by Dr. 

 Underwood at Austin, Texas; Figs. 2, 5, and 13-18 from Hep. Amer. n. 68. 



Plate IV. 



Frullania Catalince F.vans. — Fig. \. Plants, natural size. — Fig. 2. Part of plant, postical 

 view, showing perianth and androecium. — Fig. 3. Part of plant, postical view. — 



