THE ADULT SPOROPHYTE 



103 



noted in the bundle ofB. virginianum. 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. ohliquum 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. virginianum 



Fig. 76. 

 Tetrarch root of Botrychium z'jrgititanum en, endodermis; -v, xylem; ph, phloem. 



A. Apex of primary root of Botrychium virginianum. 



B. Apex of second root. X125. 



Fig. 77. 

 X200. 



C. Apex of large root, transverse section. 



D. Diarch vascular bundle of the pr'mary 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. lunarta. In such forms certain of the segments of the sterile lamina may bear 

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



