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THE GARDENER'S ASSISTANT. 



deep - green, glaucous beneath, the margins recurved, 

 pouched; stipes dark-brown; gigantea and glaucescens are 

 varieties. Australia. G. 



Goniophlebium. See Polypodium. 



Goniopteris. See Polypodium. 



Gymnogramme. — This genus contains many extremely 

 handsome plants, distinguished by their free forked veins 

 and linear naked sori. The most beautiful have the 

 under side of the fronds densely covered with a farinose 

 powder of a white or golden colour, which has given rise 

 to the popular names of Gold and Silver Ferns. The 

 genus contains two annual species — G. leptophylla and 

 G. charophylla, the first having almost a world-wide dis- 

 tribution ; the latter is West Indian. Plant in peat, 

 loam, and sand, providing ample drainage. They grow 

 best in a sunny position in the warm house, and whilst 

 they like a moist atmosphere, they must not be syringed. 

 In winter they should be watered sparingly. 



G. calomelanos. — Fronds bipinnate, 10 to 30 inches long, 

 deep-green, densely powdered beneath. Tropical America. 

 There are numerous varieties, the best known being Al- 

 stoni, chrysophylla, Laucheana, grandiceps, Peruviana, and 

 Parsonsi. 



G. decomposita (elegantissima). — Fronds 1 to 2 feet long, 

 the rachis flexuose and brown, the pinnules divided into 

 numerous narrow segments, bright -green, yellow powdery 

 beneath. Very elegant, and of rapid growth. Andes. 



G. Jlexuosa. — Fronds scandent, zigzag, divided into 

 slender segments, bright -green on both sides, entirely 

 destitute of powder. Tropical America. 



G. Lathami. — A garden hybrid raised in the Botanic- 

 Gardens, Birmingham, from decomposita and schizophylla. 

 and possessed of the characters of both. 



G. Pearcei. — Fronds 2 feet long, divided into narrow 

 linear segments, bright-green above, slightly powdered 

 below; stipes brown; var. robuxta has larger fronds with 

 powdery stipes. Peru. 



G. pidchella. — Fronds finely divided, 10 to 20 inches 

 long, wide at the base, bright-green, white-powdered 

 below. Stipes black. Venezuela. Var. Mayi has sin. int- 

 erested fronds; var. WettenhaUiana is another crested form 

 with yellow powder. 



G. schizophylla (fig. 722). — Fronds crowded, slender, 

 18 to 24 inches long, 4 inches wide, gracefully arching, 

 tripinnatifid, forked and proliferous at the apex. One 

 of the most graceful; excellent for baskets. Var. gloriosa 

 has longer fronds. Jamaica. 



G. sulphurca. — Fronds 6 to 10 inches long, bipinnate, 

 spreading ; pinnules slightly lobed, bright-green, yellow- 

 powdered beneath. West Indies. Var. grandiceps is a 

 crested form. 



G. tartar ca, — Fronds bipinnate, spreading, 1 to 2 feet 

 long; pinnules obtusely lobed, green, white-powdered 

 below. Stipes black. Tropical America. 



G. trifoliata. — Fronds bipinnate, 2 to 4 feet high ; pinnae 

 trifoliate, the segments linear, green, clothed below with 

 white (sometimes yellow) powder. Tropical America. 



G. Veitchii. — An elegant Fern, said to be an accidental 

 hybrid between decomposita and Pearcei robusta. 



Hemionitis cordata has simple, entire, cordate, deep- 

 green fronds, proliferous when barren, the stipes black, 

 and the rhizome creeping; H.palmata has palmate fronds, 

 with oblong crenulate segments, hairy on both sides, the 

 sterile fronds proliferous, spreading, the fertile ones erect. 



Hemitelia. — Noble aborescent Ferns, distinguished 

 from Cyathea by their half cup -shaped involucre, and 

 by the basal venules becoming curved ; also by their large, 

 broad, coriaceous fronds. 



H. capensis. — Stem 10 to 15 feet high; fronds tri- 

 pinnate, 3 to 4 feet long, dark-green, falcate and serrated, 

 the basal pinnules resembling a Trichomanes; stipes scaly. 

 South Africa. G. 



H. grandifolia. — Fronds pinnate, 6 to 8 feet long; 

 pinnae 10 to 12 inches long; segments obtuse, somewhat 

 falcate, bright shining - green ; stem about 6 feet high. 

 Tropical America. 



H. horrida. — Fronds bipinnate, 6 to 10 feet long; 

 pinnae sessile, bright - green above, paler below; stipes 

 and rachis scaly and armed with strong spines; stem 10 

 to 12 feet high. West Indies. 



H. Lindeni. — Stem less than an inch in diameter and 

 about 2 feet high ; fronds large, handsome. Peru. 



#P 



Fig. 722.— Gymnogramme schizophylla. 



H. {Cyathea) Smithii.— Stem stout, 6 to 10 feet high; 

 fronds tripinnate, broadly lanceolate, spreading, 6 to 8 

 feet long; pinnules lanceolate; stipes and rachis clothed 

 with brown chaffy scales. New Zealand. G. 



H. speciosa.— Fronds pinnate, 6 to 10 feet long; pinnae 

 serrate on the edges, 10 to 15 inches long, dark -green; 

 stipes and rachis scaly. Tropical America. 



HUMATA. See Davallia. 



Hymenophyllitm. — Closely allied to Trichomanes, from 

 which it is distinguished by its involucres, which for the 

 most part consist of two valves, instead of being entire 

 and cup-shaped. 



H. ceruginosum. — Fronds tripinnatifid, ovate, pendulous, 

 6 to 8 inches long; pinnae dense, the segments deep-green, 

 slightly tomentose. New Zealand. G. 



H. asplcnioides. — Fronds smooth, pinnatifid, 2 to 4 inches 

 long, pale-green. West Indies, &c. 



H. bivalve. — Fronds decompound, ovate, 6 to 8 inches 

 long; pinnules small, serrate, green. New Zealand. G. 



H. caudiculatum. — Fronds smooth, tripinnatifid, 6 to 



