﻿North American Eurhyxchia 



235 



■ous, irregularly to subpinnately branching ; branches ascending, 

 nearly simple, 3-12 mm. long ; branch leaves erect-spreading, ap- 

 pearing complanate when dry, 0.8-1. 1 x 0.5-0.7 mm., ovate, not 

 decurrent, obtusely acute to short-acuminate with apex often 

 twisted to the right, sharply serrate to the base, concave to nearly 

 plane, sometimes appearing papillose by the thickening of the 

 angles of the cell-walls ; costa stout, extending -f - f length of leaf, 

 ending in a spine on the lower side of the leaf; median cells linear- 

 oblong, 6-10 : 1 ; quadrate alar cells few, indistinct ; apical cells 

 rhombic, 2-3 : 1 ; leaves of stoloniferous stems small, 0.4-0.6 x 0.2 



3 mm., ovate-lanceolate, rather abruptly narrowed into a slen- 

 der acumination, costa thin and short ; upper stem leaves much 

 like branch leaves, short-acuminate : dioicous ; perichaetial leaves 

 oblong-ovate, sheathing, rather abruptly narrowed to a long 

 squarrose-recurved acumination, nearly ecostate, distantly dentate- 

 serrate above. Sporophyte 10-25 cm. high ; seta dark red-brown, 

 somewhat twisted to the right, very rough with low rounded 

 papillae ; capsule a little lighter colored, inclined to horizontal, 

 oblong-cylindric, curved, urn 2-2.5 mm. long, 3:1; little or not 

 at all contracted under mouth when dry ; operculum long-rostrate, 

 three-fourths length of urn ; annul us present, narrow, easily de- 

 tached ; segments nearly as long as teeth, more or less split ; cilia 

 usually 2, sometimes 3, strongly nodose; spores nearly smooth, 

 IO-12 /1, maturing in late autumn. 



On the ground in moist, shady places. Canada to the Gulf of 



Uexico east of the Mississippi ; Minnesota, Holzinger ; Missouri, 

 Bush. 



Type locality, Pennsylvania. 



ExsiecATi. Drumm, Muse. Am. (S. States) 134. Sulliv. 

 Muse. Allegh. 53; Sulliv. & Lesq. Muse. Bor. Am. (Ed. 1) 



^90, (Ed. 2) 



M 



335; Ren. & Card. M 



/■ 



Brit. Mosses, pi. 37 B. 



//. 104.; as E. p 

 \rtzii Dixon & Ja 



- - form from Florida (Austin, Underwood) has ovate-lanceo- 

 ate branch leaves which are much more sharply acute than is usual. 

 A comparison of the difference between E. praelongum Hedw. 

 and E. hians as given by Limpricht. 



£. praelongum. 

 Not shining, golden green. 



E. hians. 



Golden green and opalescent, shining. 



