﻿North American Eurhynchia * 247 



and in America and when found has nearly always been referred 

 to E. Stoke sit. 



E. praclongum is distinguished from its variety Stokesii by its 

 less robust, more straggling appearance, less rigid stems, fewer 

 paraphyllia and less regularly pinnate and less bipinnate branch- 

 ing. There is not the difference between the relative dimensions of 

 the leaf-cells that is indicated by the two descriptions. I think 

 Mr. Dixon's figures are too large. The leaves of the species are 

 frequently more distant than those of the variety and the branches 

 are much fewer in number. 



Dr. Roell has sent to Mrs. Britton specimens of Fenzler's col- 

 lection of Eurhynchium acutifolium Kindb. from the type locality 

 at Enumclaw, Washington. This plant is not different from E. 

 praclongum. It is described as " monoecious " but one fragment 

 3 cm. long bore five male branches and no female thus giving evi- 

 dence of being dioicous. Fenzler's plant is a brighter yellow than 

 the majority of specimens of E. praehmgum. 



5a. Eurhynchium praelongum Stokesii (Turn.) Dixon 1. c. 



Hypnutn Stokesii Turn. Muse. Hiber. 159. pi. 15. f. 5. 1804. 

 Hypnum praclongum \dx. StokesiiBnd. Sp. Muse. 2: 103. 18 12. 

 Eurhynchium Stokesii Br. & Sch. Bryol. Eur. fasc. 57-61.//. 

 H26. 1854. 



Gametophyte in wide intricate mats, green to light yellowish 

 green ; stems rigid, procumbent, often stoloniferous, irregularly 

 divided; 10-13 cm. long, sparingly radiculose, sending upsuberect 

 secondary stems which are closely and regularly pinnate, often bi- 

 pinnate and 2-3 cm. long, branching more or less perfectly pinnate ; 

 branchlets slender, 3-13 mm. long, terete-foliate ; branch leaves 

 erect-open, decurrent, ovate-lanceolate, acuminate, 0.7-0.8 x 0.45 

 mm., smaller at the apex of the branches and on the smaller branch - 

 lets, serrate above, serrulate to the base ; angles of the cell walls very 

 slightly papillose-thickened ; costa extending three-fourths length 

 of leaf, often ending in a spine underneath ; median cells oblong- 

 linear, 5^8 : 1, broader and shorter at the decurrent angles ; stem 

 leaves distant, squarrose, strongly decurrent, triangular-ovate, ab- 

 ruptly long and slenderly acuminate, 07-O.9 X 0.9-1.3 mm., ser- 

 rate (nearly entire on some of the stoloniferous portions) basal cells 



thicker w Hcd, quadrate alar cells more numerous than in the 

 branch leaves; paraphyllia borne sparingly on the -terns (Dixon /. 



