372 CLUB-MOSS FAMILY. 



* * Fru'-tijiration borne at the top or middle of an otherwise leafy frond. 



O. Claytoniana. Wet places, common : sterile fronds much like those 

 of the last, hut more obtuse at the top; fertile ones with 2-4 pairs of contracted 

 and fertile blackish pinna- just below the middle, othcrwist like the sterile 



O. regalis, ROYAL FERN. Also common in swamps and wet woods, 

 fruiting later than the others : fronds truly bipinnatc; pinnules oval or oblong, 

 serrulate, obtuse, sometimes a little heart-shaped at base, or slightly auriclcd on 

 one side ; fertile portion at the top of the frond, panicled ; spore-rases light- 

 brown. 



29. BOTRYCHIUM, MOONWORT. (Name from the Greek word for 

 a bunch of grapes, from the appearance of the fructification.) Species very few, 



' none cultivated. 



B. ternatum. Shaded grassy pastures and hillsklcs : plant fleshy, 3' - 10' 

 hiti'h ; common stalk with two branches, a long-stalked fertile one with' twice or 

 thrice pinnate fructification facing a triangular ternately compound sterile por- 

 tion on a longer or shorter stalk. Has several forms: var. LUXARIOIDKS has 

 roundish kidney-shaped sterile divisions; in var. OBL!QL-UM they arc lanceolate 

 from an oblique base; and in var. DISSECTUM, pinnatitid into narrowly toothed 

 and ragged lobes. 



B. Virginicum. In rich woods : plant herbaceous, not fleshy, 6' - 1 8' high ; 

 sterile portion sessile on the common stalk, thin, broadly triangular, ternate ; 

 the ports twice or thrice pinnate ; divisions thin, oblonir-lanccolato, incised or 

 toothed; fertile portion long-stalked, twice or thrive pinna;c. Other smaller 

 species occur rarely N. 



30. OPHIOGLOSSUM. (Greek equivalent of the common name ) 



O. VUlgatum, ADDER'S-TONGUK Wet meadows or hillside pastures, 

 rare: 3' -10' high; sterile portion somewhat fleshy, ovate or elliptical, entire, 

 l'-2' long, sessile near the middle of the stalk which supports the short two 

 sided spike. Some rare tropical species have large and palmate, or pendulous 

 and ribbon-like fronds. 



134. LYCOPODIACE^I, CLUB-MOSS FAMILY. 



Flowerless plants often moss-like or fern-like, with leafy, often 

 elongated and branching stems, the spores contained in rattier large 

 solitary spore-cases borne in the axils of the simple mostly awl- 

 shaped leaves. 



1. Growing on land : stems more or less elongated and brandling: leaves mostly 

 less th'tn I' loiifj, often minute: spore-cises in (he axiks of the upper (of (en 

 transformed ttnd imbricated) scale-like leaves. 



1. LYCOPODIUM. Mostly evergreen plants ; tho loaves awl-shaped, in 4 or 



more rows; the 2-valved kidney-shaped spore-cases all of one kind, contain 

 ing only minute numberless spores. 



2. 8ELAQINELLA. I.u f one species evergreen X.; leaves mostly flattened, rare- 



ly awl-shaped, mostly in 4 rows, two rows being of Smaller leaves; spore-cases 

 of 2 kinds; one 2-valved and filled with minute spores, the other 3-4-valved 

 and containing very few largo spores. 



2. Growing in water or mud: stems ri-ry short and corm-Uke : leaves rush-likt 1 , 

 elongated, int/i lnr(/e spore-cases adJieriny to the, upper surface of their dilated 

 basts, and as if imbedded in them. 



3. ISOKTKS. Outer spore-cases with large reticulated spores; inner ones with 



minute powdery spores. 



1. LYCOPODIUM, CLUB-MOSS. (Name from the Greek, meaning 



vi >'/"*- font, probably from the short hairv branches of /,. r/nrdtuni ) Spccici 

 about 100, m all parts of the world : the following all wild species. 



