FERNS— STOVE AND GREENHOUSE. 



597 



wide; pinnae strap-shaped ^-inch wide; rachis clothed with 

 rust-coloured hairs. Var. tripinnatifida (fig. 712) has the 

 pinnae cut and tasselled at the apex, and is one of the 

 handsomest of Ferns. Solomon Islands. 



Fig. 724. — Nephrolep=i= davnllioides furcans. 



Niphobolus. See Polypodium. 



Nothochl^ena. — Neat Ferns, many of them clothed 

 on the under side with a dense coating of farinose powder; 

 the sori are, however, marginal. Although not difficult 

 to cultivate, they require considerable attention in winter, 

 when their fronds must not be wetted. Pot in fibrous 

 peat, sand, and lumps of sandstone. 



N. EcHoniana. — Fronds 6 to 12 inches long, tripinnate; 

 green above, clothed with long white scales below, which 

 become tawny with age. South Africa. G. 



N. flavens. — Fronds tripinnate, 6 to 10 inches long; 

 pinnules distant, roundish, bright-green, yellow -powdered 

 below; sori marginal, black; stipes slender, black. Tropi- 

 cal America. 



N. lanuginosa. — Fronds 6 to 10 inches, an inch wide, 

 bipinnate ; deep - green, clothed with white woolly hairs 

 which turn to brown with age. South Europe, Madeira, 

 &c. G. 



N. Marantce. — Fronds 4 to 10 inches long, bipinnate; 

 pinnules oblong, obtuse, deep-green, clothed below with 

 reddish-brown scales. South Europe, &c. G. 



N. nivea. — Fronds tripinnate, 6 to 12 inches long; pin- 



nules roundish, dark-green above, white farinose beneath; 

 sori marginal, black; stipes and rachis black. Tropical 

 America. 



N. rufa. — Fronds pinnate, 10 to 20 inches long; pinnae 

 oblong, pinnatifid, light -green, white woolly beneath. 

 Tropical America. 



N. sinuata (Icevis). — Fronds 1 to 2 feet long, pinnate; 

 pinnae broad, deeply lobed, deep - green above, white 

 woolly beneath. Mexico. 



N. sulphurea (pulveracea). — Fronds bipinnatifid, 6 to 

 18 inches long; pinnae deeply pinnatifid, under side 

 dusted with white powder. Mexico. 



N. triehomanioides. — Fronds 12 to 18 inches long, pin- 

 nate; pinnae oblong, crenate, deep-green, white or tawny 

 beneath. West Indies. 



PelLjEA (Platyloma). — Fronds pinnate or bipinnate, 

 often coriaceous and glaucous, venation free, sori marginal, 

 the receptacles formed of a portion of the apices of the 

 venules, the edges of the pinnae becoming in some species 

 reflexed, and forming a spurious indusium. 



P. atropurpurea. — Fronds 6 to 12 inches long, bipin- 

 nate; pinnules oblong or ovate; stipes and rachis hirsute. 

 North America. G. 



P. Calomelanos. — Fronds 6 to 12 inches long, bipinnate, 



Fig. 725.— Nephrolepsis Duffii. 



glaucous; pinnules trilobate, cordate; stipes and rachis 

 black, with chaffy scales at the base. South Africa. G. 

 P. cordata. — Fronds 1 to 2 feet long, bipinnate; pin- 

 nules cordate, glaucous-green; stipes and rachis pale- 



