Jan. 1896. Flora of W. Virgixia — Millspaugh & Nuttall. 187 



Europea, Table 88. It may be distinguished from Cattipylopics 

 Virginiciis, also remarkable for its caducous leaves, by the longer, 

 more slender subulate point, which is entire or minutely serrate 

 and smooth on the back, by the thick base, with infiexed blades, 

 and by the shape of the basal cells at the angles. ' 



DiCRANODONTiuM MiLLSPAUGHi, E. G. Britton, Fl. W. Va., 488 (1892) 

 Plate. 



Monongalia: on sandstone boulder, deep woods, Tibb's Run 

 (Millspaugh, 1596). 



Plant slight yellowish green, silky, caespitose; stems matted 

 with rufous tomentum at base, 1-3 cm. long, a few denudate, 

 roughened by the fragments of the slightly caducous leaves. 

 Leaves secund or erect-spreading, 4-5 mm. long, narrowly subu- 

 late from abroad base i-i)4 mm. long, becoming tubular above 

 with inrolled margins, basal angles not auricled, filled by large 

 . hyaline cells to the base of the broad, brown vein, those of the 

 blade oblong or square next the vein, becoming spindle-shaped 

 and prosenchymatous toward the margin, vein thick, excurrent 

 into a dentate slender tip, rough on back. Dioecious, perichae- 

 tium 5-7 mm. long, bracts sheathing half their length, tapering to 

 a long, slender, obscurely serrate tip, outer shorter, abruptly sub- 

 ulate, more sharply serrate; pedicels recurved, burying the cap- 

 sules among the leaves, becoming erect when old, 5-8 mm. long, 

 stout and twisted in two directions; capsules pyriform-cylindric 

 with a distinct neck, length about i mm. without the lid, which is 

 as long as the rest of the capsule, with a straight beak; calyptra 

 cucuUate, entire; peristome red, connivent, teeth deep set, slen- 

 der, split to middle, or perforate to base, striolate below, granu- 

 lose above; annulus none, mouth bordered by a dense, dark rim. 

 Maturing in summer, old capsules persistent, not suicate. 



Differs from European specimens of D. longirostrc in the struct- 

 ure of the base of the leaf, lacking the suddenly inflated basal 

 auricles; differing also in the cells above the base, teeth not split 

 to base, occasionally only perforate. From D. Virginiciis it may 

 be distinguished by the less caducous leaves, shorter, stouter, 

 more arcuate pedicels, smaller capsules, and longer sheathing 

 perichcEtium. 



Through the kindness of Dr. Robinson I have been able to 

 compare these specimens with those collected by SuUivant on 

 Grandfather Mt. in 1843. His also are fruiting, and an excellent 

 drawing is preserved, hence I am able to assert that the speci- 

 mens are almost identical. Sullivant's showing no naked stems, 

 but many of the leaves are caducous. Dr. Braithwaite kindly 

 compared the West Virginia specimens with Canipylopus pyrifonnis, 

 sending me specimens of this and the variety M idler i, and 

 sketches of the bases of the leaves. It is evident that Sullivant 

 was mistaken in referring his specimens to C. flexuosiis, as they 

 are more closely allied to Dicranodontiinn longirostrc, var. alpiniis. 



DiCRANUM FLAGILLARE Hedw. 



DiCRANUM scoPARiuM (L.) Hedw. 



