CAMPYLOPUS. 91 



base half the length of the leaf, narrowed, with the margins 

 involute, to a straight short tubular subula, not hyaline pointed ; 

 cells at angles vesicular, hyaline, hardly auriculate, rarely forming 

 distinct, minute, slightly inflated auricles ; basal cells narrow, 

 rectangular, hyaline, very soon passing into the shorter, obliquely 

 rhomboid or sub-elliptical chlorophyllose cells which occupy the 

 greater part of the lamina ; a band of extremely narrow, thin, 

 hyaline cells usually forms a narrow border to the leaf base for 

 some distance higher than the hyaline cells extend in the interior 

 of the leaf ; towards the apex of the leaf the lamina consists of a 

 single row of short oblique cells reaching very nearly to the 

 summit, where however the nerve is very shortly excurrent with 

 a few denticulations ; at base the nerve is very broad, usually 

 nearly f the whole width, and forming the greater part of the 

 subula above ; in section of about 4 layers of cells, two ventral 

 layers usually large, thin-walled, and hyaline ; posterior layers of 

 smaller, uniform cells, the alternate cells of the dorsal row 

 usually slightly projecting, owing to a slight longitudinal furrow- 

 ing of the nerve at back. Seta straight. 



Var. /8. elongatus Bosw. In wide patches, closely tufted ; 

 stems tall, slender, 1-2 inches high, copiously radiculose in the 

 lower part. Leaves more distant, somewhat longer in the subula. 



Hab. Dry sandy spots by roadsides, etc. Rare. The var. in muddy debris 

 near the Wye, Builth ( Boswell). 



A pretty little species, known by its minute size and short leaves. The narrower 

 hyaline cells at the base, extending only a short distance upwards, together with the 

 much shorter, straight subula, will distinguish it from almost all forms of C. fragilis 

 and C. pyriformis, both of which differ also in the nerve section. C. Schwarzii has 

 the leaves distinctly auricled. The presence or absence of auricles in this as in some 

 other species is a very uncertain character, some plants showing distinctly inflated 

 tufts of angular cells, while in others they are barely distinguishable from the other 

 basal cells. The nerve section too shows a considerable amount of variation in the 

 number of layers and the protuberance of the dorsal cells. Indeed it is a difficult 

 plant to distinguish certainly from starved forms of several of the other species. 



The fruit has only been found in a single station in Norway. 



* Oampylopus Schimperi Milde (Tab. XVI. B.). 



Differs from C. subulatus in the usually taller, more robust 

 stems, with leaves more densely imbricated, the plants densely 

 tufted and usually interwoven to near the summit with brown 

 radicles, 1-3 inches high, usually bright green above, pale or 

 brown below. Leaves much like those of the above species, but 

 often longer, with a setaceous subula ; basal cells very narrow, 

 the angular vesicular, sometimes brown, and forming more or 

 less distinct but minute auricles. 



