Ophioglossum harrisii Underw.

Ophioglossum harrisii Underwood, sp. no v
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. reticulatum 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.