PART II 



ARCHEGONIATA. 



(Cryptogams). 



DIVISION A. PTERIDOPHYTA (Vascular Cryptogams). 

 Section I. FILICALES (Ferns). 



Except the common Bracken, ferns have become very rare in 

 our district, and many of the rarer kinds have been quite extirpated. 

 A rich collection of ferns, illustrating most of the families, native 

 and exotic, may be seen in the Winter Gardens, Avery Hill. 



Class I. EUSPORANGIATE FERNS, 



N.O. 1. OPHIOGLOSSACEJE. 



1907. OPHIOGLOSSUM vulgare, L. (ADDER'S TONGUE), 56. 

 Damp pastures and woods ; frequent, especially on stiff 

 soils. 



1. Cemetery, Well Hall Road, abundant, '06. Tynemouth. 



2. Joyden's Wood, '06. Miss Pearce. 



3. Nr. public footpath, Holwood Park, '07. In '05 a 



spike appeared with 4 spore-bearing stalks. W.H.G. 



4. In a fruit-pickers' meadow, Crofton, '04. W.H.G. 



1909. BOTRYCHIUM lunaria, Sw. (MOONWORT), 57, Hilly pas- 

 tures and heaths. Extinct in the district. 



a. Blackheath, 1597. 



b. Chislehurst Common, 1724. 



c. First record, 1570 : Greenwich. 



Class II. LEPTOSPORANGIATE FERNS. 

 Series I. Heterosporous Water-Ferns (HYDROPTERIDE.E). 



None found in Kent, but several sp. representing every 

 genus are cultivated at Avery Hill : Pilularia, Azolla, 

 Marsilia, Salvinia. Pilularia and Azolla are both found in 

 Surrey, but Azolla must have been introduced. 



