268 SOME ADDITIONAL JAMAICA FERNS. 
the branches very oblique, simple in the larger segments, no 
entering the margin. Sori copious, pois patie in distinct Light 
— marginal dots, 1-4 to the side of a ent. Involuecres 
minute, subreniform, eventually concealed by ‘the sori. — Gathere 
at Oxford, 8 Elizabeth parish, by Rev. T. = Rees, after whom it 
isnamed. It belongs to the section Adiantopsis. 
Pteris serene Agdh. Distinguished by the long (especially 
segments, and broadly rounded open sinus, copious 
erminal) se 
fine areolation of the veins, writhout coped free branches, and 
peculiar rootstock, which consists of an aggregation of nutlets, 
each of which aaa exc a “ert frond, having its own roots, and 
quite independent of the 
Aspleni tum pas m Mart. x a 
As —- Rootstock fibrous, erect, to- 
mentose, and slightly dark ve He “Btipites grey-green, except the base, 
tufted, those of the barren fronds 1-2 in. long, of the fertile 3-6 in., 
naked. Fertile fronds central, very erect, the barren extern 
much smaller, and erecto-spreading; the former oblong- Janceolate, 
4-7 in. long, 13-1} in. wide, the base truncate, the apex narrowe 
and terminated in a lobate blunt or rounded SS inne 
superior base. Texture herbaceo-chartaccous; surfaces naked ; 
colour grey-green. Rachis flattish, slightly margined, like- -coloured 
with the stipites. Sori 14-3 1. long, spreading oe =~ 
side of the midrib, not reaching the margin. — eee through 
the island on rocks from low altitudes up to 6000 ft wet larger 
plant than 4. dentatum L., between which and A. obtusifolium it is 
intermediate. 
Hartianum, n. sp. — Rootstock stout, erect, the crown 
clothed with laneeolate: os scales. Stipites cespitose, erect, 
0-18 in. long, ¢ brown, “‘puberu ous, the dark base 
clothed with seamen eaten like those of the rootstéck. Fronds 
oe RN acuminate, with a pinnatifid serrate apex, 
broadest or not reduced at the base, 2-34 ft. long, 1-14 ft. wide. 
carne ed i i Vv 
sages Senator elder on 
_ long, 3-7 1. wide, the interior ones of the lower pinne reduced, 
and ary lowest one on the inferior side of the 1-2 lowest pair of all 
- l 
dv 
the pinnatifid outer part is app proached. 
z ange we crenato-dentate, the teeth 1-2 1. wide, Texture 
