— 43 — 



Gray, 11-14,000 ft. Of H. besides the specimen mentioned by Aus- 



tin, we have a portion from the type locality sent to Jaeger by Heufler, as 

 well as a large number of exsiccatse and specimens from various European 

 authorities. With these I have made comparisons with a series of speci- 

 mens from various Western States, and I have no hesitation in agreeing 

 with Austin's decision as expressed by the synonymy given above. Mr. 

 Williams also has come to the same conclusion as he has had occasion to 

 study some of these specimens in determining his collection from Montana 

 and the Yukon Territory, and he is already on record in his lists of species of 

 these regions. 



The species seems to be common in high Alpine and subarctic regions 

 of both hemispheres, the type locality of H. revohttmnhQvsi^ at an elevation 

 of 18,700 ft. in Thibet. Lindberg also described a species which he called 

 H. plicatulum (Act. Soc. Scien. Fenn. 10:254. 1872) collected by Arnell in 

 Siberia which Harald Lindberg has recently examined and pronounced to 

 be the same as H. revolutum. It is singular that both Mitten and Lindberg 

 should have used the same specific name for the same species. 



It will be found that Limpricht describes two European varieties, 

 pygmaeum and Molendoamim, and that Renauld and Cardot have 

 described one American variety, Villardi, from specimens collected by Roll 

 at Helena, Montana. The latter appears to me to be referable to the Euro- 

 pean v2s\q\.j pygjnaeum, and is simply a depauperate, slender form, resem- 

 bling some of the states of H. cupressiforme. 



Limpricht records a long list of European stations at high elevations in all 

 the mountain regions, ranging from 1,300-5,800 meters. In North America, 

 the species has not been recorded from the Eastern United States, but is com- 

 mon in the Rocky Mountains, from British Columbia to Arizona and into 

 Mexico. It is also reported from Hudson's Bay and Greenland. 



Kindberg reverses the sequence of names by placing H. revolutum as a 

 subspecies of H. plicatile^ and limiting the name to the European species. 



New York Botanical Garden. 



Explanation of Plate i, Sematophyllum recurvans (Michx.) E. G. Brit- 

 ton. In The Bryologist, January, 1903 : 



Fig. I. S. recurvans. plant x 2 ; S. recurvans, anteridial, bud x 2. Fig, 

 2. Same enlarged, x 10. Fig. 3. Leaf of stem. Fig. 4. Base of same 

 showing vesicular alar cells. Fig. 5. Apex of same showing serrate point. 

 Fig. 6. Antheridial bud, X 10. Fig. 7. Leaf of same. Fig 8. Antheridia 

 and paraphyses. Fig. 9. Perichaetium and base of pedicel. Fig.ro. Apex 

 of perichaetial leaf. Fig. 11. Mature capsule. Fig 12. Old capsule. 

 Fig. 13. Lid, showing beak. Fig. 14. Stomata on neck of capsule. Fig. 

 15. Peristome. Fig. 16. Annulns, showing three inflated cells. Fig. 17. 

 Tooth of peristome, showing inter trabeculate surface. Fig. 18. Spores. 



