GENERA AND SPECIES OF CULTIVATED FERNS. 
145 
1. 0. interrupt a, Michaux.—A very ornamental hardy deciduous Fern, from North America. Fronds of two 
kinds; the sterile glabrous, lanceolate, pinnate, one to two feet long, light green, with lanceolate pinnae, of which 
the inferior are petiolulate, deeply pinnatifid, with oblong-obtuse segments, entire at the margin ; the fertile ones 
erect, lanceolate, one and a half to two feet high, pinnate, their pinnae lanceolate, the inferior sterile, petiolulate, 
the intermediate contracted and sporangiferous, the upper sterile at the apex. Fronds terminal, adherent to a 
stocky crown. 
2. 0. cinnamomea , Linnaeus.—A beautiful hardy deciduous species, from North America. Fronds of tw o 
kinds; the sterile lanceolate, subbipinnate, one to one and a half foot long, pale green, with lanceolate, sub- 
petiolate pinnae, deeply pinnatifid, with ovate-obtuse segments, entire at the margin; the fertile ones erect, con¬ 
tracted, bipinnate, one and a half foot high, of a rusty brown colour, and very woolly. Fronds terminal, adherent 
around a stocky crown. 
3. 0. regalis , Linnaeus.—A beautiful, hardy, deciduous Fern, indigenous to Britain, and found generally 
throughout Europe, Asia, Africa, and North America. Frond glabrous, bipinnate, four to ten feet high, rather 
glaucous j pinnules oblong, nearly entire, obtuse at the apex, dilated and some¬ 
what subauricled at the base, crenulate on the margin, and articulated with 
the rachis. Sori paniculate, on the apex of the frond. Fronds nearly all fer¬ 
tile ; terminal, adherent to a caudiciform rhizome, often forming very large tufts. 
0. regalis & spectabilis (0. spectabilis, Willdenow). —An ornamental hardy 
deciduous Fern, from North America. Frond slender, glabrous, ovate-lanceolate, 
bipinnate, two foot high ; pinnules oblong, petiolulate, obtuse at the apex, 
obliquely-truncate at the base, crenulate-serrate on the margin. Sori paniculate 
on the apex of the fronds, which are terminal, adherent to a caudiciform 
rhizome. 
IT'rtODEA, Willdenow. —Name commemorative of Henry Julius Tode, of Meek¬ 
ly lenburg, an experienced mycologist. 
Sori oblong, simple or forked, and subsequently confluent. Spore-cases 
naked, subglobose, bivalved, produced on evident venules, and but few to each 
Veins simple, or forked; venules direct, free. Fronds bipinnatifid, from 
sorus. . x , 
one to three feet high ; pinnae coriaceous, and serrated, or membranous pellucid 
and multifid. Rhizome thick, caudiciform.—A very limited genus, the species 
having an aspect widely different from that of Osmunda, although the spore- 
cases are of a precisely similar description. They are natives of New Holland, 
New Zealand, and the Cape of Good Hope, and are rare in gardens, being very 
seldom imported, and not easily propagated. They are distinguished from 
Osmunda by their spore-cases being produced on evident venules, and the fertile 
portions of the fronds being, if at all, only slightly contracted. Fig. 91 repre¬ 
sents a pinna of T. africana (med. size). 
1. T. africana, V illdenow (Osmunda totta, Swartz. } Osmunda barbara, 
Thunberg). — An evergreen warm greenhouse Fern, a native of the Cape of Good 
Hope, and New Holland. Fronds glabrous, lanceolate, subbipinnate, two to 
three feet high, darkish green ; pinnules subcoriaceous, lanceolate, repand, 
decurrent at the base, forming a winged rachis, obtuse at the apex, and serrate 
at the margin. Sori confined to the inferior pinnules, on the lower half of the 
fronds, which are terminal, adherent, dilated at the base, where is formed an 
erect caudiciform rhizome. 
2. T. pellucida , Carmichael (T. hymenophylloides, Riehard). —A very elegant 
evergreen warm greenhouse species, from New Zealand. Fronds membranous, 
ovate-lanceolate, subtripinnate, one to two feet long, olive green ; pinnules 
oblong, deeply pinnatifid, decurrent at the base, forming a winged rachis; seg¬ 
ments linear, repand, with a single vein. Spore-cases small, abundant on the 
inferior pinnules. Rachis and midrib of pinnae hairy. Fronds terminal, adherent, dilated at the base, there forming 
an erect caudiciform rhizome. 
Order —Marattiace,®. 
This very distinct and well-marked natural group contains but few genera, and probably not more than 
twenty species. Their aspect and habit is so peculiarly characteristic, and so widely different from those ot other 
Ferns, that they may be recognized in almost any stage of their development, even in the absence of true i ca¬ 
tion. They have large sessile or pedicellate spore-cases, which are either horny, opaque, stinct an u oc a , 
or laterally and oppositely connate, so becoming multilocular; round oblong oi linear, 1 - el ^ a or , na .J. e ’ 
opening by pores or vertical slits in the interior side. The plants are usually large and robust, mhajiting 
