458 ACOTYLEDONOUS PLANTS. 



lobes. Fertile fronds variously divided into small linear seg- 

 ments, with the sori in 2 imbricated rows. 



16. SCHIZEA. Smith. 



Spikes unilateral, flabellate, aggregate. Capsules with ra- 

 diating furrows at the top, somewhat turbinate, bursting late- 

 rally, sessile. Involucre continuous, formed of the inflexed 

 margin of the spikes. 



S. pusilfn Pursh : frond simple, linear-compressed, tortuous ; spike* 

 few, conglomerated at the summit of a long slender stipe. S>. iortuosa 

 Muhl 



HAB. Pine barrens near Quakers' Bridge. N. J. Aug. 2_. A 

 very small fern, with numerous cespitose fronds, which are 

 about 2 inches long. Stipe 3 5 inches long, filiform, with a 

 few brownish secund spikes. It has been found in Newfound- 

 land and in the Falkland Islands, but the only intermediate lo- 

 cality known is that <jf N. J. Cooper in Ann. N. Y. Lye. ii. 266. 



Div. III. OPHIOGLOSSE*!. Capsules of one cell, adnate at 

 the base, subglobose, coriaceous, opaque, destitute of a ring, 

 not cellular, (sometimes connate,) half '2-valved. 



17. OPHIOGLOSSUM. Linn. 



Capsults round, smooth, 1-celled, 2-valved, transversely 

 opening, disposed upon an articulated 2-ranked spike. 



1. O. rvlgatum Linn. : spike cauline ; frond simple, oblong-ovate, 

 obtuse, closely reticulate. 



HAB. Low woods. N. S. June. If. Fern smooth and suc- 

 culent, 6 8 inches high, bearing a single entire subsessile 

 frond. Spike about an inch long, on a slender peduncle. Dr. 

 Gray has found 2 or 3 specimens of a fern which resembles this 

 in its specific character, but is scarcely 2 inches high. It may 

 prove on further examination to be a distinct species. If so, I 

 would propose for it the name of O. Grayi. 



2. O. bidbosum Mich. : spike cauline, short ; frond subcordate, ovate, 

 somewhat obtuse ; root bulbous. O. crotalophoroides Walt. 



HAB. Low grounds. N. J. to Car. May. If. Fern 6 inche* 

 high. Frond 1 1-2 inch long and an inch broad, reticulate, 



18. BOTRYCHIUM. Swartz. 



Capsules subglobose, 1-celled, 2-valved, distinct, sessile, 

 smooth, coriaceous, disposed in spikes or racemes, opening 

 transversely. 



1. R. simplex HitcJicock : scape with one frond above ; frond ternate, 

 pinnatifid ; segments cuneate, obovate, incised. 



HAB. Dry woods. Can. N,Y. & Mass. June, If. Fern 26 in- 



