12 NORTH AMERICAN FLORA [VorumE 16 
long, 1-2 mm. thick, apiculate; sporangia 2-18-jugate; spores .03-.04 mm. thick, finely 
pitted and verrucose. 
TYPE LOCALITY: Near Savannah, Georgia. 
DISTRIBUTION: South Carolina to Louisiana ; Cuba. 
ILLUSTRATIONS : Jahrb. Bot. Gart. aa 3: pl. 8, %. 23; Bull. Torrey Club 24: pl. 319, f.7; 
D.C. Eaton, Ferns N. Am. fi. 81, f. 8- 
5. Ophioglossum californicum Prantl, Ber. Deuts. Bot. 
Ges. 1: 351. 1883. 
Plant 2.5-11.5 em. high; rhizome stout, cylindric, 2-17 mm. long, 2-3 mm. thick; 
roots usually numerous, fibrous and somewhat fleshy, persistent, 0.5-1 mm. thick ; leaves 
usually 2 (1-3); commonstalk 0.3-2.6 cm. long, hypogean; lamina folded, sessile or short- 
stalked, usually upwardly inclined, elliptic or oval, acute, often apiculate, 1.5-4.2 cm. long, 
0.3-0.9 cm. broad, the basal veins 3-7, the median vein about equal to the others, free 
except for secondary interconnecting veinlets, the areolae mostly parallel to the median 
vein, narrow, simple or with a few included veinlets; sporophyl 1.4-9 cm. long, the spike 
6.5-20 mm. long, 1-3 mm. thick, apiculate; sporangia 9-17-jugate; spores finely pitted, 
.045-.05 mm. in diameter, finely pitted when young, later verrucose. 
TYPE LOCALITY: San Diego, California. 
DISTRIBUTION : Southern California to Mexico. 
ILLUSTRATIONS: Jahrb. Bot. Gart. Berlin 3: p/.7, f. 11; Bull. Torrey Club 24: pl. 319, f 4. 
6. Ophioglossum vulgatum L,. Sp. Pl. 1062. 1753. 
Ophioglossum pusillum Raf. Jour. de Bot. Desv. Il. 4: 273. 1814, 
Ophioglossum arenarium E. G. Britton, Bull. Torrey Club 24: 555. 2.318 ; 319, f.3. 1897. 
Ophioglossum alaskanum E. G. Britton, Bull. Torrey Club 24: 556, p1. 319, 7 5. 1897. 
Plant 6-26 cm. high ; rhizome cylindric or fusiform, 4-15 mm. long, 1.5-4 mm. thick ; 
roots numerous, persistent, fleshy-~fibrous, 0.5-1 mm. thick ; leaves usually one, rarely two ; 
commonstalk 4-21 cm. long, mostly epigean; lamina usually sessile, plane, upwardly in- 
clined, lanceolate, ovate, oblong, elliptic or spatulate, acuté, obtuse or rounded below, 
blunt or rounded above, rarely acute, translucent when dry, 1.5-12 cm. long, 0.7-5 cm. 
broad, the basal veins 7-11, about equal in size, the median vein simple except for secondary 
connecting veinlets, or rarely with one or two branches, the areolae small and indefinite, 
simple or with few-many included veinlets; sporophyl 3-27 cm. long, the spike 8-40 mm. 
long, 1.5-3.5 mm. thick, apiculate ; sporangia 7-52-jugate ; spores .03-.05 mm. in diameter, 
reticulate, rather coarsely pitted, verrucose, the pits angular, 6-12 to the semicircumference. 
TYPE LOCALITY: Europe. 
DISTRIBUTION: Maine and Quebec to Alaska, south to Texas (and Mexico ?). 
ILLUSTRATIONS: D. C. Eaton, Ferns N. Am. ‘al. 81, f. 1-4; Bull. Torrey Club 24: 1. 319, f. 1; 
Jahrb. Bot. Gart. Berlin 3: 2. 7 72 16. 
7. Ophioglossum Engelmanni Prantl, Ber. Deuts. Bot. 
Ges. 1: 351. 1883. 
Plant 6-25 cm. high; rhizome cylindric, 5-18 mm. long, 2-4 mm. thick; roots numer- 
ous, persistent, fibrous, somewhat fleshy, mostly less than 1 mm. thick ; leaves one or often 
two; commonstalk about half hypogean, 2.5-10 cm. long; lamina sessile, with clasping base, 
upwardly inclined, elliptic or sometimes ovate-lanceolate or ovate, acutely cuneate below, 
the apex acute or rarely obtuse or rounded, apiculate, 1.8-10 cm. long, 0.9-3 cm. broad, the 
basal veins 7-13, the median slightly the largest, simple except for secondary connecting 
veinlets, the areolae mostly large with many free and anastomosing included veinlets ; 
sporophyl 6-13 cm. long, the spike 13-35 mm. long, 2-3 mm. thick, apiculate; sporangia 
10-32-jugate ; spores .04-.05 mm. in diameter, very finely pitted and faintly verrucose, the 
pits rounded, 20-30 to the semicircumference. 
TYPE LOCALITY: Comanche Spring, Texas. 
DISTRIBUTION: Virginia and Indiana to Mexico. 
ILLUSTRATIONS: Jahrb. Bot. Gart. Berlin 3: pl. 7, f. 17; Bull. Torrey Club 24: p1. 319, f. 2. 
DOUBTFUL, SPECIES 
Ophioglossum pubescens Raf. Jour. de Bot. Desy. II. 4: 273. 1814. Not identifiable; 
no pubescent Ophioglossum is known. 
