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ment of leaves. In some genera, however, the spiral turns from right 

 to left, and thus the upper margin of one leaf is made to lie upon the lower 

 margin of the one above, and the arrangement is then csdled incudous: — the 

 leaves of Bazzania are incubous. 



The plants when living are a dark green in color, becoming rather brown- 

 ish green when they are dried. Slender flagelke arise from the under side of 

 the stem, and sometimes attain the length of three-fourths, or even one inch. 

 They may be seen in the figure. These flagellae are covered with minute 

 scales and have tiny teeth at the apex. The main leaves are alternate and 

 arranged closely in two rows. They are ovate in general outline, with 

 a broad truncate apex, which is strongly three-toothed, whence 

 the specific na.mQ— triloba fa — is derived. There are but two genera common 

 in the eastern United States which have incubous leaves. 



The other genus {Kantia) has leaves which are entire (except in one rare 

 species) and is light green in color. So that incubous dark green leaves, 

 with toothed apex furnish marks for easily distinguishing this genus. 



The leaves in B. trilobata are slightly deflexedor sometimes quite com- 

 planate. The only other species of our territory {B. defle.xa Underw.) has 

 its leaves strongly deflexed, with narrow apex, 2-3 toothed or rarely entire. 

 This latter is found only in the higher mountains. Its underleaves are 

 roundish-quadrangular, somewhat recurved from the stem, and have from 

 four to six teeth. The surface of all leaves is somewhat shining. 



Bazzania is a dioicous genus. The male organs (called antheridia, as in 

 the mosses) are borne in the axils of leaves on short antheridial spikes, which 

 in turn spring from the axils of underleaves. They are seldom found. The 

 archegonia are borne on short branches, also from the axils of underleaves. 



After the archegonium has been fertilized there is developed a nearly 

 cylindrical sheath, white in color, and slightly three-keeled. This is the 

 perianth. The perichaetial leaves are small ovate scales with the upper 

 margin variously incised. The fertilized archegonium rapidly develops the 

 sporogonium, with a rudimentary pedicel, and enclosed in a membranous 

 sack, pointed at the apex and fastened at the base. This sack is the calyp- 

 tra. 



Soon the sporogonium bursts through the top of the calyptra, and passes 

 on up through the perianth, borne upon a stalk of delicate white cellu- 

 lar tissue. It is now a shining, nearly globular body, dark brown in color. 

 When it reaches a height of about a half inch above the perianth the capsule 

 splits into four valves, allowing the dissemination of the spores. Contained 

 in the capsule with the spores are elaters, with two slender spiral fibers, 

 very like those previously described. 



Sayre High School, Sayre. Pa. 



So many of our readers are also interested in ferns that we feel justified 

 in calling their attention to the latest and best book on the ferns, " Our 

 Ferns in Their Haunts," by Willard N. Clute. Copiously illustrated with 



