I 
THE GENERA AND SPECIES OF CULTIVATED FEKNS. 
green ; pinnules oblong, inciso-pinnatifld, with serrate spinose mucronate lobes. Sori medial. Indusium entire 
on the margin. Stipes with broad ovate pale-coloured scales, approximate near the base, remote upwards ; termi- 
nal, adherent to a somewhat tufted rhizome. This is closely related to Z. cristata, through the L. uliginosa, 
Newman, our L. cristata, B. A form of the next species is often mistaken for it. 
22. L. dilatata, Presl (Aspidium, Willdenow; A. spinulosum, Willdenow; L. multiflora, Newman). — Avery 
elegant hardy deciduous species, indigenous to Britain, and found in various parts of Europe. Fronds ovate- 
lanceolate, arched, glabrous, bipinnate, often tripinnate below, from one to three feet high, deep green ; pinnules 
pinnatifid or pinnate, with serrated spinose-mucronate lobes. Sori medial. Indusium fringed with stalked 
glands. Stipes densely scaly, the scales lanceolate, entire, and usually dark-coloured down the centre ; terminal, 
adherent to a tufted rhizome. There are numerous forms of this species. 
23. L. intermedia, Presl (Aspidium, Willdenow). — An ornamental, hardy, deciduous Fern, from North America. 
Fronds rather ovate-acuminate, two feet high, light green, bipinnate ; pinnules narrow oblong-acute, lower ones 
pinnatifid, upper confluent, segments inciso- serrate, with spinulose teeth. Fronds terminal, adherent to a tufted 
rhizome. This is probably only an occidental form of our indigenous L. dilatata. 
24. L. fosnisecii, Watson (Nephrodium, Loice ; L. recurva, Newman). — A beautiful, compact, evergreen, hardy 
Fern, indigenous to Britain, and also found in Madeira, &c. Fronds deltoid, glandulose beneath, sub-tripinnate, 
one to one and a half foot long, lively green ; pinnules oblong, curved upwards, deeply pinnatifid, with serrated 
spinose-mucronate recurved lobes. Sori medial. Indusium jagged at the margin, with minute sessile glands. 
Eachis and stipes clothed with narrow jagged scales ; terminal, adherent to a tufted rhizome. This plant has 
been long cultivated under the name of Aspidium dumetoriim, but is not the A. dumetorwn of Sir J. E. Smith's 
own herbarium, which is a mere dwarf form of L. dilatata. 
25. L. glabella, J. Smith (Nephrodium, A. Cunningham). — An evergreen, warm greenhouse Fern, from New 
Zealand. Fronds glabrous, triangularly elongate, about a foot long, sub-tripinnate, lightish green; pinna? 
triangularly elongate ; pinnules oblong-linear, pinnatifid, basal ones entire, upper ones confluent, with dentate 
segments. Sori medial. Stipes with a few scales at the base ; terminal, adherent to a tufted rhizome. 
26. L. pubescens, Presl (Aspidium, Swartz). — A rather dwarf-growing, evergreen stove Fern, from Jamaica. 
Fronds pubescent, deltoid, about a foot long, sub-tripinnate, whitish green ; pinnules oblong-linear, with sharply 
dentate segments, largest on the superior side. Sori medial. Stipes covered with brown scales, especially at the 
base ; lateral, adherent to a slender scaly creeping rhizome. 
27. L. decomposita, J. Smith (Nephrodium, S. Brown).- — An ornamental, evergreen, warm greenhouse Fern, 
from New Holland. Fronds rather membranous, deltoid, one and a half to two feet long, tripinnate, light green ; 
pinnules oblong, acute or obtuse, inciso-pinnatifid, with dentate segments. Eachis and midrib of pinna? pubescent ; 
Stipes scattered over with small dark scales. Sori medial. Fronds lateral, adherent to a creeping rhizome, about 
the size of a goose-quill. 
28. L. elegans, Hort. — A very handsome, evergreen stove species, from Ceylon. Fronds deltoid, glandulose, 
densely pubescent, one and a half to two feet high, rather erect, tripinnate, light green ; pinnules oblong-linear, 
acute, decurrent at the base, deeply pinnatifid, with short dentate segments. Sori sub-marginal. Indusium often 
peltate. Stipes scaly at the base ; lateral, adherent to a creeping rhizome. This is a rare species in cultivation. 
Introduced to Kew, about six years ago, by the late Dr. Gardner. 
29. L. spinescens, J. H. — An ornamental, evergreen stove Fem, from the East Indies. Fronds pubescent, 
deltoid, one and a half to two feet long, dull green, tripinnate ; pinnules linear-lanceolate, pinnatifid, decurrent at 
the base, with rather ovate slightly dentate segments, terminating in a long spinous mucro. Sori sub-marginal. 
Stipes scaly. Fronds lateral, adherent to a scaly creeping rhizome. This species is also rare in cultivation, 
although introduced ten years ago, among some Orchids, by S. Pucker, Esq., of Wandsworth. 
30. L. hispidum, J. H. (Aspidium, Swartz ; Polystichum, /. Smith). — A very hairy, evergreen, warm greenhouse 
Fern, from New Zealand. Fronds hairy, deltoid, a foot long, dark green, bipinnate ; pinnules linear -lanceolate, 
narrow, pinnatifid, with narrow mucronate segments. Sori medial. Fronds terminal, adherent to a creeping 
rhizome. 
31. L. rittosa, Presl (Aspidium, Swartz). — A robust-growing, evergreen stove species, from Jamaica. Fronds 
hairy, triangularly elongate, ten to twelve feet long, light green, tri-quadri-pinnate ; pinnules oblong-linear, rather 
obtuse, deeply pinnatifid, with oblong segments round at the apex. Sori medial. Indusium glandulose. Eachis 
and stipes densely covered with narrow fringed scales. Fronds terminal, adherent to an arborescent caudex. 
POLYSTICHUM, Schott: Roth. (Aspidii, sp. of Swartz). — Name derived from polys, many, and stichos, order; 
alluding to the numerous regular Hues in which the sori are disposed. 
Sori round, uniserial, medial, rarely terminal. Indusium orbicular, central, rarely excentric and reniform. 
Veins forked, or pinnately forked ; venules direct, free, the lower exterior one or more fertile. Fronds glabrous 
or squamose, simple pinnate or bi-tri-pinnate, with coriaceous pinna?, usually auriculate at the base on the superior 
side and serrate on the margin, the teeth or serratures terminating in a rigid mucro or spinule. — This genus 
and the preceding are so closely allied, that it becomes difficult to find characters whereby they may clearly be 
distinguished ; indeed, the characteristics which have been proposed by various authors for their definition are, to 
a great extent, as applicable to one as the other. The reniform indusia and free veins which characterize 
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