100 — 



PTERYGOPHYLLUM ACUMINATUM AT OHIO PYLE, 

 PENNSYLVANIA 



O. E. Jennings 



On the I2th and 13th of May, of this year, Mrs. Jennings and I, together 

 with Dr. and Mrs. W. H. Emig, were at Ohio Pyle, Fayette County, Pennsylvania. 

 Ohio Pyle lies in a deep rocky valley where the Youghiogheny River cuts through 

 the Laurel Hill Mountains. The locality is noted not only for its beautiful 

 scenery, but also for the occurrence of many rare or unusual plants that range 

 mainly through the southern Alleghanies. Here occur Pyrularia pubera, Marshal- 

 lia obovata, Azalea arborescens, Aconitum uncinatum, and others; doubtless similar 

 peculiarities of range occur no less prominently among the mosses. 



On the trip mentioned we discovered a patch of Pterygophyllum acuminatum 

 (C. M.) Paris, which was growing on a large block of sandstone, frequently dashed 

 with spray, in a deep ravine a few yards below Cucumber Falls. The plants 

 were sterile, but were named for me by Dr. G. N. Best, who notes that the species 

 "differs but little if indeed at all, from Pt. acutifolium (Hook.) Besch. and by 

 several bryologists is regarded as simply a passing form of Pt. lucens (L.) Brid. 



Hookeria {?) Sullivantii C. M. Mss., of the Lesquereux and James 



Manual, is referred by its author to Pt. lucens Bridel, and in his description of 

 Pt. lucens he says of its leaves, 'saepe rhizophora,' a condition which may be 

 observed in your moss. I congratulate you upon this interesting and rare moss, 

 and suggest that you keep an eye to its sexual organs. It appears to me to be 

 dioicous, but I am not sure of it. Pt. acutifolium is said to differ from Pt. lucens^ 

 among other things, in being monoicous." 



Carnegie Museum, Pittsburgh, Pa. 



REVIEWS 



The various delays in mails incident to the war, and further hindrances on 

 our own account, render the notices below a little tardy. We trust that they 

 may be none the less welcome. In the last volume of the Nyt Magazm to ar- 

 rive Dr. Lynge continues his Index of lichen exsiccati^ already noticed-. The 

 pagination in this portion follows consecutively with that of the earlier part in 

 volume 53 of the Nyt Magazin, and cause a repetition of pages 113 to 187 in- 

 clusive of the present volume. This arrangement, while perhaps presenting 

 certain drawbacks, will greatly facilitate the ultimate publication of Dr. Lynge's 

 work as a separate book. The present portion continues the systematic index 

 of the various exsiccati alphabetically by authors, with critical notes as to con- 

 tents, titles, etc., covering from specimen 607 of Britzelmayr: Lichens Exsiccati, 

 to number 447 of the Kryptogamae Exsiccatae of the Museum Palatinum Vin- 

 dobonense. 



1 Index specierum et varietatum Hchenum quae collectionibus "Lichenes Exsiccati" dis- 

 tributae sunt. Bernt Lynge. Nyt Magazin for Naturvidenskaberne. 54: 113-304. (1916). 



2 Bryologist 19: 78. (1916.) 



