Fig. 15: 1 and 2, Onoclea sensibilis: 1, plant with fertile and sterile fronds, x %: 

 2, details of upper portion of sterile segment, x 2. 3-5, Lorinseria areolata: 3, plant 

 with fertile and sterile fronds, x W, 4, section of segment with son, x 2; 5 details 

 of upper portion of sterile segments, x 2. (From Correll in Lundell's Flora of Texas, 

 Vol. 1,P1. 28). 



