Victorian Plants. 117 



576. Fruit-masses elongated, often linear. 



Ferns, varying from dwarf to tall in stature ; spore- 

 caselets longitudinally almost surrounded by an imperfect 

 ringlet. Figure 152. Grammitis. 2146 



Fruit-masses abbreviated, often roundish. 



Ferns, varying from dwarf to tall in stature, but never 

 really arborescent ; fruit-masses roundish or sometimes 

 oval or even narrow-elliptical, some rarely almost mar- 

 ginal ; spore-caselets usually on very conspicuous stalk- 

 lets, longitudinally almost surrounded by an imperfect 

 ringlet. Figure 151. JPolypodium. 2147 



577. Fruit-masses at the margin of the frond below ... 578 



Fruit-masses on the under side of the frond away 

 from the margin. (Exception: Lomaria partly).. ... 582 



578. Fruit-cover generally abbreviated ... ... ... 579 



Fruit-cover generally elongated ... ... ... 581 



579. Fruit-cover formed by a recurved lobule of the frond. 



Ferns, usually of conspicuous size ; fruit-cover minute, 

 scale-like, passing gradually into the margin of the 

 frond ; spore-caselets longitudinally almost surrounded 

 by an imperfect ringlet. Hypolepis. 2152 



Fruit-cover distinct ... ... ... ... ... 580 



580. Fruit-cover opening outward. 



Ferns, varying from dwarf to tall in stature ; fruit-cover 

 generally almost cup-shaped or tubular, entire, opening 

 vertically; spore-caselets longitudinally almost surrounded 

 by an often imperfect ringlet. Figure 140. Davallia. 2153 



Fruit-cover opening inward. 



Ferns, varying in size, but generally not very tall ; fronds 

 outward almost impervious to moisture, their segments 

 without any prominent middle-venule ; fruit-cover gene- 

 rally short and often imperfectly circular or reniform ; 

 spore-caselets attached to the inner side of the fruit-cover, 

 longitudinally almost surrounded by an imperfect ringlet. 

 Figure 142. Adiantum. 2155 



