222 Evans: Notes on genus Herberta 



to produce them more frequently than the side-leaves. The teeth 



are of fair size, often involving several cells, and may be rounded or 



sharp. In the latter case they are especially conspicuous (Text 



FIG. 24). It has already been noted that teeth form an important 



feature of the leaves in H. Sendtneri, whereas in H. adnnca and 



H. Hiitcliins'iae the margin is normally entire. H. tenuis occupies 



an intermediate position in this respect, the teeth being less 



frequent than in H. Sendtneri but more frequent than in either of 



the other species. 



The present paper is based largely on material in the herbarium 



of Yale University. This has been supplemented by specimens 



from the Taylor herbarium at Harvard University and from the 



herbarium of the New York Botanical Garden. Additional 



specimens have been received from Professsr A. LeRoy Andrews 



of Cornell University, from Mr. S. M. Macvicar of Invermoidart, 



Scotland, and from Mr. C. Jensen of Hvalso, Denmark. The 



writer would express his sincere thanks to all who have aided him 



in his work. 



Sheffield Scientific School, 

 Yale University. 



Hx:plaiiation of plate 8 



Herberta Hutchinsiae (Gottsche) Evans 



Figs. 1-3. Leaves, X 40. 



Fig. 4. Cells from the lower part of a leaf, showing the basal vitta, X 225. 



Fig. 5. Cells from the dorsal base of a leaf, showing two rudimentary teeth, 

 X 225. 



Fig. 6. Cells from the upper part of a dorsal leaf-division, X 225. 



Fig. 7. Cells from the apex of the same division, X 225. 



Figs. 8, 9. Perigonial bracts, X 40. 



Fig. 10. Periohaetial bract from next to the last pair, X 27. 



Fig. II. Perichaetial bract from the innermost pair of the same involucre, X 27. 



Fig. 12. Paraphyllium from the same involucre, X 27. 



Fig. 13. Perianth, spread out flat, X 27. 



Fig. 14. Transverse section of perianth, X 40. 



Fig. i was drawn from Irish specimens collected by B. Carrington and distri- 

 buted in Rabenhorst's Hep. Europ. 210; Fig. 2, from Scottish specimens collected 

 by S. M. Macvicar and distributed in Schiffner's Hep. Europ. Exsic. 467; the re- 

 maining figures, from specimens collected by T. C. Frye at Port Antonio, Alaska, 64Q. 



