THE DICTIONARY OF GARDENING, 
72 
Glaucium— continued. Gleditschia—continued. 
phoeniceum le).* fl. crimson, with a black s at G. sinensis (Chinese). fl. greenish. Summer. Z., leaflets ovate- 
the base of eac wpa we È oblong, SAER T hatiy. elliptic, obtuse; spines robust, conical, rameal ones simple or 
h. Yin. England (probably naturalised). SYN. G. corniculatum. branched, cauline ones in fascicles, branched. A. 30ft. to 50ft. 
(Sy. En. B. 65.) China, 1774. SYN. G. horrida. 
GLAUCOUS. Covered with a fine bloom. 
GLAUX (the name given by Dioscorides to another 
plant; from glaukos, greyish-green). Black Saltwort; Sea 
Milkwort. ORD. Primulacew. A pretty little herbaceous 
perennial, rarely seen in gardens. It thrives in a moist 
sandy soil, and may be propagated by seeds. 
G. (sea). fl. of a pale pink colour, not two lines long, 
solitary, nearly sessile and axillary ; corolla wanting ; calyx deeply 
five-lobed. Summer. J, small, mostly opposite, sessile, ovate, 
oblong or almost linear, entire. A. in. to 6in. Europe (Britain), 
North and West Asia, and North America, on sands, salt-marshes, 
and muddy places, near the sea. (Sy. En. B. 1150.) 
GLAZING. Numerous systems of Glazing have, of 
late years, been invented and patented, all being chiefly 
directed against the use of putty, and professing to offer 
advantages over the ordinary method, such as cheapness 
in construction, durability, the admission of additional 
light, and special facilities for repairing broken glass. 
Although some of these methods are largely adopted, and 
answer well in the case of extensive glass buildings, their 
use for horticultural purposes is by no means general. 
One of the best patent systems introduced is that known 
as Rendle’s, in which the panes of glass are fitted at the 
top and bottom into horizontal grooves formed of bent 
zine, and are slightly lapped on each other at the sides. 
The zine grooves are made to conduct the water down 
the roof from the outside, and also that caused by con- 
densation underneath. This renders the structure re- 
markably free from drip inside, which is an important 
consideration. No putty is used, and the plan answers 
equally well either with straight or curvilinear roofs, the 
glass being kept in place by indiarubber wedges. Various 
other modes are recommended by different makers, some 
having strips of felt along the sides of the panes, and a 
metal ridge on each rafter, screwed on the felt sufficiently 
close to hold all firmly underneath. The use of putty is 
requisite with sashes that are movable, either as ven- 
tilators or for covering frames, to prevent the glass 
shaking out or becoming displaced. In Glazing, the 
panes may vary in size, according to the dimensions of 
the house or pit. Unless the roof be very flat, the laps 
should not exceed in., and they should be made as air- 
tight as possible, each pane being secured in position 
before the putty is put on by small pieces of zinc made 
for the purpose. The larger the panes are, the more 
light do they admit; but a length of 23ft. or 3ft. must 
be an outside limit, with a width not much exceeding 1ft. 
Great pressure is put on the surface of glass houses 
= by rough winds, and by snow in winter; and, in order to 
_ withstand this, the quality of the glass and proper Glazing 
nust be insured in the first instance. 
GLAZIOVA. Included under Cocos (which see). 
GLECHOMA. Now included under Nepeta (which 
see), 
GLEDITSCHIA (named after Gottlieb Gleditsch, of 
Leipsic, 1714-1786, Director of Botanic Gardens at Berlin). 
Syn. Glediisia. ORD. Leguminose. A genus comprising 
about half-a-dozen_ Species of ornamental, mostly hardy, 
deciduous trees, inhabiting temperate or sub-tropical 
Asia and North America (one of them tropical African). 
Flowers greenish, disposed in spikes. Leaves abruptly 
pinnate and bipinnate on the same tree. Branches supra- 
axillary, frequently converted into branched spines. The 
species are of easy culture in almost any soil. Propa- 
gated by seeds, obtained from their natural habitats, and 
sown in March, about lin. deep. 
G. horrida (horrid). A synonym of G, sinensis. 
G. perma (one-seeded). Water Locust. fl. greenish. 
Summer. l, leaflets ovate-oblong, acute; spines slender, few, 
usually tritid. A. 50ft. to 40ft. United States, 1723. 
. 
PE hai 
+> to lin. broad; segments linear, acute. 
G. triacanthos (three-spined).* Honey Locust. jl. greenish. Sum- 
mer, l, leaflets linear-oblong, lucid ; spines robust, compressed 
at the base, but cylindrically conical at the apex, simple or tritid. 
h. 30ft. to 50ft. United States, 1700. There are several varieties 
of this.fine tree, including an unarmed one, also one with a pen- 
dulous habit. (W. D. B. ii. 138.) 
GLEDITSIA. A synonym of Gleditschia (which 
see). 
GLEICHENIA (named in honour of W. F. Gleichen, 
1717-1783, a German botanist). Orb. Filices. A genus 
comprising about thirty species of ornamental stove and 
greenhouse ferns. Caudex mostly creeping. Fronds rarely 
unbranched, generally dichotomously divided; pinnie 
deeply pinnatifid, with the segments small and concave. 
Sori of few (usually two to four) sessile capsules, situated 
on a lower exterior veinlet. For general culture, see 
Ferns. 
G. acutifolia (acute-leaved). A synonym of G. quadripartita. 
G. Bancroftii (Bancroft’s). A synonym of G. longissima. 
G. bifurcata (twice-forked). A synonym of G. flagellaris. 
G. bracteata (bracteate). A synonym of G. jlagellaris. 
— 
Fic. 112. GLEICHENTIA CIRCINATA. 
G. circinata (circinate).* fronds, lobes of the pinnz ovate or 
sub-rotund, more or less glaucous beneath, the margins slightly 
recurved; branches and rachis glabrous, or more or less pu- 
nt. Capsules three to four, superficial. Australia. Stove. 
pink gh gl ia G. — phylla, G. spel The variety 
semi-vestita has the rachises and young fronds ver leaceo- 
pubescent. See Fig. 113. ———— ip te 
G. (hidden-fruited). fronds proliferous, coriaceous, 
deep yellow or yellow-brown when dry; branches dichotomously 
flabelliform ; pinnz broad-lanceolate, sub-erect and compact, 4in. 
to Sin. long, lin. broad, pectinato-pinnatifid ; segments narrow- 
linear, strongly veined, the margins singularly revolute, conceal- 
ing the sori. Capsules one to four ina sorus. h. 3ft. Chili, 1865. 
Greenhouse. 
C. Cunninghami (Cunningham’s). fronds often proliferous, cori- 
aceous ; branches dichotomously flabelliform, glaucous beneath, 
ry ; pinne linear-lanceolate, acuminate, 4in. to 6in. long, żin. 
: Capsules two to four 
in a sorus. New Zealand. Greenhouse. (H. 5. F. i. 6B.) 
G. dicarpa (two-fruited).* fronds, lobes of the pinne round, sub- 
hemispherical, very fornicate. Capsules two, concealed within 
the almost slipper-shaped lobes, and mixed with ferruginous, 
paleaceous hairs, which often extend to the rachis. Australia. 
A variable stove species. (H. S. F. i. 1c.) The variety alpina 
is generally smaller and more compact, rachis and young shoots 
ferruginous with paleaceous wool. SYN. G. hecistophylla. (i. S. F. 
i. 2B.) Another elegant variety, introduced in 1879, is longipin- 
nata, in which the fronds are longer than those of the type, 
and the growth is exceedingly graceful. 
G. dichotoma (forked).* sti. zigzag, repeatedly di- or trichoto- 
mous, the ultimate branches bearing a pair of forked pinne, 
about 8in. long and 2in. wide; segments never decurrent, glau- 
