tt Sterile segment mucronate, 
2. O. Engelmanni Prantl. 
Ophioglossum Engelmanni Prantl^ 1884. Jahr. 
koen. bot. Gart. Berlin 3: 318. t. 8. f. 17. 
Underw. 1898. in 111. Fl. 3 : App. 494. f . la ; 
Nat. Ferns 67 ; in Britt. Man. 2. 
O. vulgatum Engelmanni Clute^ 1. c. 48. 316. 
Waters^ 1. c. 
Addkij's Tongue. 
Plants 1-2 dm. high;stenle leaf-segment elliptic-lan- 
ceolate. 
Staunton, Va., W> A. MurrilL 
2. BOTRYCHIUM Sw. 
iSoTpvSov racematim I, i7t modum racemi 
Gemma incipieitti iivae similis Plini jy. 10. Swartz, 
1801. Schrad. Journ. Bot. 1800: 2 : 1 10. 
Succulent plants. Rootstock erect with many fleshy 
rootlets. Sterile leaf-segments various ; fertile segments 
pinnate to 3-pinnate or paniculate. 
t Sterile leaf -segment ternate^ sessile, 
1. B. virginianum Sw. PI. I. 
Osmunda fronde pinnatifida caulina,^ fructi- 
ficationibus spicatis . . Gron, I.e. 
Osmunda virginia7ta L, I yjj. Sp.Pl. 1064. 
10 
