PaR® 1, 1909] OPHIOGLOSSACEAE 11 
1. Ophioglossum reticulatum L. Sp. Pl. 1063. 1753. 
Plant 13-36 em. high; rhizome cylindric, 0.7-20 mm. long, 3-5 mm. thick ; roots fleshy- 
fibrous, persistent, mostly 1 mm. thick; leaves usually solitary, sometimes two; common- 
stalk 3-15 cm. long, usually mostly epigean ; lamina usually short-stalked, somewhat folded 
below, nearly horizontal, deltoid-ovate to reniform, auriculate or rarely truncate, acute, 
obtuse or rounded above, sometimes apiculate, 2.5-10 cm. long, 2-6.8 cm. broad; areolae 
mostly compound with few to many free or anastomosing included veinlets; sporophyl 
6.5-26 cm. long, the spike slender, 1.8-6.5 cm. long, 1.5-3 mm. thick, more or less apicu- 
late; sporangia 18-60-jugate; spores .03-.04 mm. thick, finely pitted or reticulate, the 
areolae about 20 to the semicircumference, the ridges finely verrucose. 
TYPE LOCALITY: Near Léogane, Haiti. 
DISTRIBUTION : Pan-tropic ; altitude 500-800 meters. 
ILLUSTRATIONS: Plumier, Traité Foug. p/. 16¢ ; Hook. & Grev. Ic. Fil. 61.20; Jahrb. Bot. Gart. 
Berlin 3: £1. 8, f. 32. 
2. Ophioglossum Harrisii Underwood, sp. nov. 
Plant 4.5-18 cm. high, reproducing by suckers; rhizome stout, cylindric, 5~13 mm. 
long by 3.5-5 mm. thick; leaves usually solitary, sometimes two or even three; commonstalk 
1.7-9.5 cm. long, usually half or more hypogean ; lamina sessile, folded, usually horizontal, 
deltoid to deltoid-reniform or suborbicular, truncate or sometimes obtuse below, acute, 
obtuse or rounded above, usually apiculate, 1.5-3.5 cm. long, 1.3-2.3 cm. broad, the 
areolae simple or with a few included veinlets; sporophyl 2.2-11.5 cm. long, the spike 
rather stout, 0.7-2.5 cm. long, 1.3-3 mm. thick, apiculate ; sporangia 10-35-jugate ; spores 
as in O. veticulatum finely pitted, .035-.04 mm. in diameter, 
Type collected near Cinchona, Jamaica, altitude 1600 meters, January 30, 1903, Underwood 169 
(herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Mountains of Jamaica, at an altitude of from 1000-1600 meters, usually in 
cleared land. 
3. Ophioglossum crotalophoroides Walt. Fl. Car. 256. 1788. 
Ophioglossum bulbosum Michx. Fl. Bor. Am. 2: 276. 1803. 
Ophioglossum tuberosum FH. & A. Bot. Beech. Voy. 53. 1832. 
Ophioglossum stipitatum Colla, Mem. Accad. Torino 39: 52. 1836. 
Plant 1.5-13.5 cm. high; rhizome globose, 0.5-1 cm. thick ; roots few, hairlike, less than 
0.5mm. thick; leaves two to four; commonstalk short, 0.8-3.5 cm. long, mostly hypogean ; 
lamina nearly horizontal, somewhat folded below, usually cordate, short-stalked, acute or 
obtuse with a short acuminate or even apiculate apex, rarely deltoid-ovate or ovate and 
truncate or obtuse below, 1.1-4 cm. long, 0.7-2.2 cm. broad, the basal veins 5-7, the 
median vein slightly the largest, emitting 1 or 2 branches, the areolae simple or with few 
included veinlets; sporophyl 1.3-10 cm. long, the spike stout, 3-14 mm. long, 2-5 mm. 
thick, often long-apiculate ; sporangia 3-14-jugate; spores .04-.05 mm. thick, reticulate or 
pitted, the areolae about 15 to the semicircumference, the ridges verrucose. 
TYPE LOCALITY: South Carolina. . ; 
DISTRIBUTION: South Carolina to Texas, and from Mexico to Argentina and Chile. 
ILLUSTRATIONS: D.C. Eaton, Ferns N. Am. p/. 81, f. 5-7; Jahrb. Bot. Gart. Berlin 3: £1.8, f. 25. 
4. Ophioglossum tenerum Mett.; Prantl, Ber. Deuts. 
Bot. Ges. 1: 352. 1883. 
Ophioglossum pusillum Nutt. Gen. 2: 248. 1818. Not O. pusillum Raf. 1814. 
Plant 1.5-10 cm. high, often in sand; rhizome stout, cylindric or globose, 2-5 mm. 
long, 1.8-5 mm. thick; roots persistent, fibrous, about 0.5 mm. thick; leaves usually two 
(1-4) ; commonstalk 0.1-2 cm. long, hypogean ; lamina sessile or short-stalked, mostly 
plane and nearly horizontal, elliptic to broadly ovate, acute or obtuse below, acute above, 
usually not apiculate, 0.4-2 cm. long, 0.2-0.9 cm. broad, the basal veins 3-5, the median 
vein slightly the strongest, emitting one or two branches, the areolae divergent from the 
median vein, mostly small, short and broad, the largest with several free and anastomosing 
included veinlets; sporophyl slender, 1.5-8 cm. long, the spike rather slender, 2-12 mm. 
