FERNS— STOVE AND GREENHOUSE. 



593 



clothed with blackish scales ; fronds 6 to 9 inches long, 

 rigid, tripinnate, like those of D. bullata but thicker in 

 texture. China. G. 



Deparia Moore i. — A handsome and distinct Fern; 

 sori globose, marginal, or on the upper surface of the 

 frond, which is bi- or tri-pinnatifid, triangular, 6 to 18 

 inches high ; pinnate below, the upper portion pinnatifid. 

 New Caledonia. 



Dicksonia. — Evergreen Tree -Ferns well deserving 

 attention. They are characterized by large decompound, 

 coriaceous fronds, forked veins with free venules, and a 

 coriaceous two-valved indusium. 



D. antarctica. — Stem stout, 10 to 20 feet high; fronds 

 tripinnate, rigid, spreading, 6 to 15 feet long; pinnules 

 deeply pinnatifid, dark -green; stipes and rachis hairy, 

 the base scaly. Australia and Tasmania. Gr. Hardy in 

 the warmer parts of Great Britain. 



D. {Oibotium) Chamlssoi. — Trunk tall; fronds broadly 

 ovate, bipinnate, glossy-green; rachis scaly; pinnules 

 linear-oblong, serrated at the apex. Sandwich Islands. 



D. (Balantium) Culcita.—C&xidex creeping; fronds tri- 

 pinnate, 3 to 6 feet long, dark shining- green ; the stipes 

 clothed with silky hairs. Madeira, Azores, &c. G. 



D. (Cibotium) glaucum. — Trunk tree-like; fronds tri- 

 pinnate, ovate, green, very glaucous beneath; pinnules 

 linear-oblong, falcate. Sandwich Islands. 



D. Lathami. — A hybrid between D. antarctica and 

 D. arborescens, raised in the Botanic Gardens, Birming- 

 ham. It is remarkable for its sturdy habit and large 

 glossy-green fronds. 



D. (Cibotium) Menziesii. — Fronds large, bipinnate; 

 pinnae broadly acuminate ; segments broad, obtuse, dark- 

 green, densely clothed with woolly hairs. Sandwich 

 Islands. 



D. (Cibotium) regalis. — Fronds decompound, 6 to 12 

 feet long ; segments lobed, bright -green ; crown densely 

 clothed with cinnamon hairs. Mexico. 



D. (Cibotium) Schiedei. — Fronds bipinnate, pendulous, 

 6 to 15 feet long ; pinnules deeply lobed, pale-green above, 

 white beneath ; crown clothed with red hairs. Mexico. 



D. squarrosa (fig. 720). — Stem slender, 6 to 20 feet 

 high; fronds tripinnate, 10 to 12 feet long; pinnules sub- 

 sessile, serrate, rigid, deep-green ; stipes and rachis clothed 

 with blackish hairs. New Zealand. G. 



Didymochl.ena lunulata. — The only species. Fronds 

 1 to 6 feet long ; bipinnate, coriaceous, deep -green ; the 

 pinnules articulated with the rachis, which is densely 

 clothed with large brown scales. Pot in rough peat and 

 sand, and supply liberally with water ; if allowed to get 

 dry the jointed pinnules drop off. Tropical America, &c. 



Doodia. — Dwarf-growing evergreen Ferns, related to 

 Woodwardia, the chief distinction being in the superficial 

 sori. 



D. aspera. — Fronds pinnatifid, 6 to 12 inches long; 

 pinnae slightly falcate, dull-green; stipes and rachis rough; 

 var. corymbifera has shorter crested fronds. Australia. G. 



D. blechnoides. — Fronds pinnatifid, rigid, broadly lanceo- 

 late, 6 to 18 inches long, dull-green; segments lanceolate, 

 serrate; stipes clothed with black scales. Australia. G. 



D. caudata. — Sterile fronds pinnate, linear - oblong, 

 smooth, 6 to 8 inches long; fertile fronds contracted, 

 pinnate, with linear pinnae; apical pinnae caudate, dark- 

 green; rachis smooth; var. confiuens has pinnatifid sterile 

 fronds. Australia. G. 



D. media. — Fronds pinnate, 12 to 18 inches long; 

 pinnae obtuse, spiny-toothed, red when young; stipes and 

 rachis pink, downy. New Zealand, &c. G. 



Doryopteris. See Pteris. 

 Vol. I. 



Drynaria. See Polypodium. 



Elaphoglossum. See Acrostichum. 



Gleichenia. — This genus contains many truly beautiful 

 plants, characterized by their dichotomously-branched 

 fronds, with wire-like stalks, linear pinnae, and small, 

 often re volute, segments. Pot in sandy peat and char- 

 coal in well - drained pots or pans, as they enjoy an 

 abundant supply of water, and also require ample space 

 for the rhizomes to creep over. They thrive best in a 

 light greenhouse, but they dislike draught. 



G. circhiata (fig. 721). — Fronds dichotomeusly divided; 

 segments subrotund, not pouched below, green above, 



Fig. 721.— Gleichenia circinata. 



paler beneath; stipes and rachis hairy. New South Wales, 

 &c. Var. glauca is stronger, and the under side of the 

 fronds is beautifully glaucous. Var. semivestita has or 

 bicular, concave, deep-green segments. Var. Spelunco? has 

 segments somewhat ovate, pale-green above, silvery-white 

 below. New Zealand. G. 



G. Cunninghamii. — Fronds flabellate erect, 1 to 4 feet 

 long; segments 6 to 8 inches long, dark-green above, 

 slightly glaucous below; stipes and young growth densely 

 covered with large brown chaffy scales. New Zealand. G. 



G. dicarpa. — Fronds 1 to 3 feet long ; segments orbi- 

 cular, margins recurved, pouched, deep-green; stems hairy; 

 branches smooth. Var. longipinnata has long narrow 

 pinnae. Tasmania. G. 



G. dichotoma. — Fronds zigzag, repeatedly forked, vari- 

 able in size, glaucous-green above, tomentose beneath, the 

 pinnae varying in length from 12 to 18 inches. Tropics. G. 



G. flabellata. — Fronds flabellate, erect. 2 to 5 feet long; 

 segments lanceolate, pinnatifid, the margins serrate, bright 

 green; stipes stout, smooth. Australia. G. 



G. rupestris. — Fronds 2 to 6 feet long; pinnae broad, 



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