328 A MANUAL OP MOSSES 



Fayette : On damp rocks in deep hollows and 



ravines, Ohio Pyle, September 1-3, 1906, 

 and September 1-3, 1907. O. E. J. and G. 

 K. J. (Figured); also May 30-31, June 

 13, and July 4, 1908. O. E. J. ; Ohio Pyle, 

 June 15, 1902. J. A. S. 



2. Rhaphidostegium novae-caesareae (Austin) Renauld and 



Cardot. 



{Hypnum inicans Wilson, not Swartz; Rhynchostegiitm novae- 

 caesareae Austin). 



(Plate XLVIII) 

 Small, yellowish-green, glossy, forming wide, thin mats: 

 stems prostrate, very slender, sparsely branching, the branches 

 short, simple or sparsely branched, sub-erect; leaves spread- 

 ing or the upper sometimes sub-secund, sub-orbicular, apicu- 

 late to shortly acuminate, 0.6-0.8 mm. long, serrulate, very 

 concave, the margins somewhat reflexed below; costa double 

 and very faint; median leaf-cells linear, flexuous, about 6-10:1, 

 the apical rhomboid-oblong, rather incrassate, much smaller 

 than the median, the basal a little shorter and wider than the 

 median, the alar region with about 6 to 10 larger, quadrate to 

 rectangular, rather incrassate cells and with the outermost 

 one to three cells much larger and more or less inflated : the 

 capsules of this species have thus far been foimd but once, — 

 on damp rocks along Sfony Creek, Carbon County, Pennsyl- 

 vania, by Francis Woll'e : capsules small with a shortly rostrate 

 lid, the exothecial cells non-collenchymatous : dioicous. 



On damp rocks in cool and moist mountain ravines from 

 New York and New Jersey southwards in the mountains. Rare 

 in our region. 



McKean : Bennett Brook, July 10, 1898. D. A. B. 



(Figured). 



3. Rhaphidostegium adnatum (Richard) Bryologia Europsea. 

 (Leskea adnata Richard; Rh. microcarpuni Jaeger; Leskea 



microcarpa Bridel ; Sematophylluin adnatum E. G. Britton). 



Small, in tangled, thin, green to golden-green mats : stems 

 prostrate, with short and incurved branches ; leaves rather 

 closely imbricate when dry, sub-homomallous, the upper usual- 

 ly distinctly secund, narrowly oblong-lanceolate, the apex 

 rather shortly acuminate, subserrulate to entire, margins quite 

 broadly reflexed; costa double bvit very short and faint; 

 median leaf-cells linear-fusiform, flexuous, about 8-12:1, 

 shorter and wider at the base, towards the angles a border of 

 sub-rectangular and scarcely inflated cells and at the extreme 

 angle a few distinctly inflated alar cells : seta short and smooth, 



