4 FLORA OF BURLINGTON AND VICINITY 



0. C'lajtoniaiia L. Interrupted Fern. Wet woods and pastures; com- 

 mon. Fertile May; sterile June. 



0. rt'galis L. Royal Fern. Wet woods and swamps; common. June. 

 Forms occur with the sterile fronds fertile at the tips and with the 

 pinnules incised; South Burlington and Burlington, (N. F. F.). 



OPHIOGLOSSACEAE. ADDER'S TONGUE FAMILY 



BOTRYCHIUM Sw. Moonwort 



B. lanoeolatiun (Gmel.) Angst., var. augustisegmeiitiim Pease & Moore. 

 Lance-leaved Grape Fern. Cool open woods; rare. July. Bur- 

 lington, (Ross). 



B. obliqiiuii) Muhl. Grape Fern. Moist sandy soil : occasional. Sept. 

 Var. DissECTUM (Spreng.) Clute. Occasional. Sept. 



B. ramosuin (Roth) Aschers. Rich woods; rare. July. Burlington, 

 (Ross); Colchester, (Griffin). 



B. simplex Hitchc. Little Grape Fern. Moist pastures; rare. June, 

 July. Burlington, (N. F. F., Ross). 



B. ternatum (Thunb.) Sw., var. intermedium Eaton. Ternate Grape 

 Fern. Sandy soil; rare. Sept. Burlington, (N. F. F., Ross). Var. 

 RUTAEFouuM (A. Br.) Eaton. Rare. Sept. Burlington, (Gilbert). 



B. rirgiiiiaiium (L.) Sw. Rattlesnake Fern. Rich woods; frequent and 

 variable in size. June, July. 



OPHIOGLOSSUM (Tourn.) L. Adder's Tongue 



0. Yulm'atiim L. Moist pastures; rare. June, July. Burlington, (N. 

 F, F.) ; Colchester, (Ross). 



EQUISETACEAE. HORSETAIL FAMILY 



EQUISETUM (Tourn.) L. Horsetail 

 E. arveiise L. Common Horsetail. Moist gravelly soil ; common. Fer- 

 tile Apr., May; sterile June. 



E. fliniatile L. Pipes. Shallow water with muddy bottom; common. 

 Fertile June; sterile July. A form occurs the branches of which 

 bear numerous small spikes; Burlington, (N. F. F.). 



E. hjeinale L., var. aftiiie (Engelm.) Eaton. Common Scouring Rush. 

 Moist gravelly banks; common. May-Sept. 



