CATALOGUE OF PLANTS 



PTERIDOPHYTA* 



OPHIOGLOSSACEAE 



Veins reticulate; sporanges cohering in a distichous spike. 

 Veins free; sporanges distinct, borne in spikes or panicles. 



i. Ophioglossum. 



2. BOTRYCHIUM. 



I. B. simplex. 



I. Ophioglossum [Tourn.] L. 

 I. O. vulgatum L. (0. arenarium E. G. Britton). In moist 

 meadows and thickets: Me. and Que. to Alask., south to Tex. 

 Scattered throughout the range, except the pine-barrens. 



2. Botrychium Sw. 



Buds of the following season wholly concealed within the base of 

 the common stalk; sterile blade more or less fleshy; cells of 

 the epidermis straight. 

 Sporophyl and sterile blade both erect in the bud. 

 Sporophyl or sterile blade, or both, at least slightly bent over 

 in the bud. 

 Buds glabrous; sterile blade usually pinnate or in No. 6 

 sometimes subternate; spores maturing in early 

 summer. 

 Sterile blade with the tip bent over in the bud, 

 clasping the erect sporophyl, entire or with 1-3 

 pairs of small segments. 

 Sterile blade and sporophyl both bent over in the bud. 

 Sterile blade distinctly stalked. 

 Sterile blade closely sessile. 

 Buds pilose; sterile blades subternately divided; spores 

 maturing in late summer or fall. 

 Sterile blades membranous in drying; segments 

 mostly acutish, serrulate to laciniate. 

 Segments mostly acute or acutish, serrulate- 

 dentate. 

 Segments laciniate, often deeply so. 

 Sterile blades thick, leathery in drying, 10-20 cm. 

 broad; segments obtuse, crenate to sinuate. 

 Buds of the following season exposed along one side; sterile blade 

 very thin; cells of the epidermis rlexuose. 



* Taxonomic treatment contributed by Miss Margaret Slosson, The general dis- 

 tribution, as stated for the first three families, follows North American Flora, the 

 remaining families mainly " Illustrated Flora." 



47 



2. B. tenebrosum. 



3. B. neglect 11 111. 

 6. B. lanceolalum. 



4. B. obliquiiiu. 



5. B. dissectum. 



7. B. silaifolium. 



8. B. vir°inianum. 



