THE ADULT SPOROPHYTK 



103 



noted in the bundle of B. virgintanum. The position of the sporangiophore is some- 

 what different in different species. In Eubotrychium it is attached, as a rule, close to 

 the junction of the sterile lamina and the petiole, very much as it is in Euophioglossum. 

 In B. ternatum and B. obltquum the long peduncle is inserted very much further 

 down, sometimes almost at the level of the ground, so that at first sight the spor- 

 angiophore seems to be quite independent of the sterile leaf. In B. virgintanum 



ph~- 



x~.l. 



Fig. 76. 

 Tetrarch root of Batrychium virgintanum en, endodermis; x, xylem; ph, phloerrii 



Fig. 77. 



A. Apex of primary root of Botrychium virginianum. X200. 



B. Apex of second root. X125. 



C. Apex of large root, transverse section. 



D. DiarcTl vascular bundle of the primary root. 



and B. lanuginosum it is inserted close to the base of the sterile lamina or even 

 above its base, and in the latter species there may even be sometimes a second spo- 

 rangiophore developed on the fertile leaf above the insertion of the primary one. 

 Certain species show various monstrosities, this being particularly the case 

 with B. lunaria. In such forms certain of the segments of tin- sterile lamina may bear 

 sporangia. A number of these curious forms are figured by Goebel (Goebel 2). 



