-78- 



Florida, Goodburn Hammock, Dade Co. Collected by J. K. Small and C. 

 A. Mosier, June 1915. No. 6242. 



This species is scarcely as large as S. adnatum, from which it is very distinct 

 in its serrulate perichaetial leaves and teeth of peristome furrowed. If the fur- 

 rowing of the teeth is to be considered of generic importance, this species would 

 be neither a Sematophyllum nor a Rhaphidostegium, for the types of both of these 

 genera, S. auricomum Mitt, and H. demissum Wils., lack the furrow. This 

 character might well be considered as of only sub-generic importance, however, 

 (the furrow being almost imperceptible in some cases, very broad in others) 

 in which case Sematophyllum antedates Rhaphidostegium by two years. 



New York Botanical Garden. 



Explanation of Plate VI 



Sematophyllum Smallii Williams 



Fig. I. Plant about natural size. 7- Part of peristome X 300 



2. Plant X 10. 8. Inner perichaetial leaf X 36 



3. Stem-leaf X 36 9- Male flower X SO 



4. Capsule with calyptra X 36 10. Lid X 36 



5. Empty capsule X 36 11. Median exothecal cells X 200 



6. Stomata X 200 12. Median leaf -cells X 200 



LICHENS OF THE MT. MONADNOGK REGION, N. H.— NO. 12 * 



Dudley Merrill 



These lichens were determined by the late Dr. H. E. Hasse. 



Genus: Pannaria 



209. Pannaria tryptophylla (Ach.) Mass. One specimen. 



210. Pannaria lanuginosa (Ach.) Koerb. Two specimens. 

 2X1. Pannaria microphylla (Sw.) Delise. Two specimens. 



212. Pannaria brunnea (Sw.) Nyl. One specimen. 



213. Pannaria lepidiota (Sommerf.) Th. Fr. One specimen. 



Genus: Conotrema. 



214. Conotrema urceolatum (Ach.) Tuck One specimen. 



Genus: Phlyctis. 



215. Phlyctis argena (Ach.) Koerb. Two specimens. 



Genus: Endocarpon. 



216. Endocarpon pallidum Ach. One specimen. 



Genus: Mycoblastus. 



217. Mycoblastus sanguinarius (L.) Th. Fr. One specimen. 



Genus: Thelotrema, 



218. Thelotrema subtile Tuck. Four specimens. 

 Middlesex School, Concord, Massachusetts 



*No. II of this series was published in the Bryologist 22 :is. iqtq 



