Ophioglossum.| OPHIOGLOSSACEAE. 639 
orbicular, with a cuneate base. The sori border, as it were, the outline 
of the frond 
Rather rare, on trees! Is reported also from Table Mountain at the Cape of Good 
Hope. 
4. H. Baldwini, Eaton, in Bull. Torrey Club, New York, Vol. V. 
(1879), no. 50. — Fronds tufted at the end of a short and rather thick 
rhizome. Stip. 1/2—1‘ long, pale-brown or greenish, densely hispid with 
long rufous spreading hairs which rise from a wart- like base. Fronds 
bright green, pellucid, linear-lanceolate, 21/25‘ < #/4—1‘, narrowing below, 
bi-, tripinnatifid with more. than 20 closely ne erecto- patent pinnae on 
Sach side, the rhachis margined, except between the lowest pinnae, and 
hispid in the lower half or two thirds. Pinnae glabrous, about 11/2“ 
broad, linear-oblong, with a rather cuneate base, cut on both sides into 
short oblong-obtuse emarginate or bifid (not toothed) segments. Veins 
simple or once forking in a segment. Sori 5—7 in the larger pinnae, 
on both sides, terminal on the. ve segments or on the anterior lobes 
of the bifid segments. Invol. very small, less than 1/2“, suborbicular, 
shortly bilabiate, the margins entire and ee the coentelin nearly 
as long as the involucre. 
Oahu! in the lateral valley of Nuuanu which leads up to Konahuanui, at an elevation 
of 2500 ft. (Baldwin). A well marked species, and singular in the genus for the short 
thizome with tufted fronds and for the regularly pinnate division of tee latter, also for 
the bright green color. The frond has a si single layer of cells and the sporangia are 
those of the genus 
OrpER XCVIL. OPHIOGLOSSACEAE. 
Sporangia formed by lobes of the frond itself, ringless, free or partly 
united, splitting deeply in a transverse or longitudinal line. Spores of 
one kind, yellow, tetraedro-globose. — Frond sheathing at the base, erect 
the posterior expanded, sterile, the anterior contracted, fertile. Rhizome 
short, mostly subterraneous, generally with a single frond which ensheaths 
with its base the buds of future fronds. The prothallium develops under 
ground, is pale, tuberous, and carries both archegonia and antheridia, 
the latter sunk in the substance. 
Sterile and fertile portion of the frond entire. . «+ 1: Ophioglossum. 
Both portions of the frond divided _ 2 Botrychium. 
te OPHIOGLOSSUM, L. 
Fertile portion entire, presenting a distichous, pedunculate spike. Spo- 
rangia connate in one row on each side of the rib, opening and at last 
two-valved by a slit vertical to the latter. Sterile frond entire, with 
areolate veins. 
A small genus, spread over ail zones and continents. 
