AN ENCYCLOPADIA 
OF HORTICULTURE. 103 
Gustavia—continued. 
flowered, sub-umbellate. Leaves large, alternate, ovate or 
spathulate, glossy. Gustavias thrive in a rich loamy soil. 
Cuttings, made from ripened shoots, root freely if inserted 
in sand, under a glass, in heat. : 
G. gracillima (very slender).* fl. rose-red, 4in. in diameter, pro- 
duced from the leaf axils in the young plants, from the wood in 
old ones, solitary or in pairs; peduncle stout, clavate, lin. to 
Zin. long. September. J. close-set, spreading and recurved, 
acuminate, serrate, narrowed into a slender petiole, lin. to 2in. 
long; margin somewhat waved; midrib prominent beneath. 
Trunk slender, quite glabrous. New Grenada, 1845, (B. M. 6151.) 
G. insignis (remarkable).* fl., corolla very large, 5in. to 6in. in 
diameter; petals cream-white, concave, spreading, externally 
tinged with rose-colour ; filaments rose; anthers orange. June. 
l. glossy, dark green, obovate-lanceolate, acuminated at the 
point, much attenuated at the base, and sessile, or nearly so. 
h. 3ft. to 4ft. Tropical America, 1858. (B. M. 5069.) 
G. pterocarpa (wing-fruited).* This is closely allied to G. 
insignis, but differs from it by the ovary being winged, the 
smaller and white flowers, the comparatively large calycine lobes, 
and the more coriaceous, nearly entire foliage. (B. M. 5239.) 
GUTIERREZIA (meaning probably commemora- 
tive). Syns. Brachyris and Brachyachiris. ORD. Com- 
posite. A genus comprising about twenty species of 
erect herbs or sub-shrubs, peculiar to America, extending 
from the Red River to Mexico; a few also occur in 
Chili and the extreme South of the continent. Flower- 
heads yellow, small, very numerous, arranged in corymbs 
at the ends of the twigs. Leaves linear, entire, gummy. 
The species are of botanical interest only. The plant 
grown in gardens under the name of G. gymnosper- 
moides is now referred to the genus Kanthocephalum 
(which see). 
GUTTA-PERCHA-TREE. Sce Isonandra. 
GUTTIFERZ. A natural order of trees or shrubs, 
with a resinous juice, natives of humid and hot places 
in tropical regions, chiefly in South America or Asia, 
while a few are found in Africa, Flowers white, yellow, 
or pink, often incomplete; sepals and petals two to six, 
rarely eight. Leaves opposite, leathery, entire. The 
plants are generally acrid, and yield a yellow gum-resin. 
There are about twenty-four genera and 230 species. 
Illustrative genera are: Calophyllum, Clusia, Garcinia, 
and Mammea. 
GUZMANNIA (named in honour of A. Guzman, a 
Spanish naturalist). ORD. Bromeliacew. A genus of 
four or five species of very handsome stove herbaceous 
perennials, allied to Tillandsia (which see for culture). 
They are all natives of tropical America. 
G. Devansayana 7 . white, tightly packed within 
` broad, acuminate, ——— * ieie * a base, purple- 
striped. E or. (B. H. 1883, 8, 9.) 
G. erythrolepis a * ite; i lish- 
red colour of the Ahas — —————— Se Gia trom eh elon. 
l. deep green, like those of G. tricolor. (F. d. S. 1089.) 
G. fragrans (fragrant), A synonym of Canistrum eburneum 
G. tricolor (three-coloured).* fl. pme white; scape erect, 1ft. to 
2ft, long, clothed with numerous bracts of a bright pale yellow 
green, beautifully streaked with blackish-purple towards the top, 
tipped with red, and at the extreme apex rich scarlet. Summer. 
l. rosulate, broad-linear, sword-shaped, involute, concave, sheath- 
ing at the base, 14ft. long, rich green. 1820. (B. M. 5220.) 
GYMNADENIA (from gymnos, naked, and aden, a 
gland; the glands of the pollen masses are naked). ORD. 
Orchidew. Pretty terrestrial orchids, now referred to 
Habenaria (which see). ` 
GYMNEMA (from gymnos, naked, and nema, a fila- 
ment; the stamineous corona being absent, the filaments 
are left naked). ORD. Asclepiadew. A genus com- 
prising about twenty-five species of stove evergreen 
climbing shrubs or sub-shrubs, natives of Africa, tropical 
and sub-tropical Asia, and Australia. Flowers yellow, 
small. Leaves opposite. The plants thrive in a well- a” 
drained compost of fibry loam and sandy peat. Cuttings 
of firm side shoots, made in spring, will root if inserted 
in sand, in heat. 
Gymnema—continued. 
G. lactiferum (milk-bearing). f. in umbels, shorter than the 
petioles; throat of sinall corolla crowned by five Heshy tubercles. 
July. l. on short petioles, ovate, bluntly acuminated, usually 
unequal-sided. ‘Tropical Asia. The milk of this plant is sub- 
stituted by the Cingalese for cows’ milk. 
G. (staining). fl. pale yellow, numerous; umbels or 
corymbs often twin, July. J. cordate, acuminated, to oval. 
Tropical Himalaya, 1823 
GYMNEMA (of Rafinesque). A synonym of Pluchea 
(which see). 
GYMNOCLADUS (from gymnos, naked, and klados, 
a branch; in reference to the naked appearance of the 
branches during winter). Kentucky Coffee - tree. ORD. 
Leguminose. A monotypic genus. The species is a very 
ornamental hardy deciduous tree. It thrives in a shaded 
situation, and in a rich, deep, free soil. Propagated by 
cuttings, made of the roots; or by imported seeds. The 
name Coffee-tree comes from the fact of its seeds having 
been used as a substitute for coffee by the early settlers. 
G. canadensis (Canadian).* /. white, disposed in terminal 
simple or thyrsoid racemes. May to July. Z. bipinnate, with 
four to seven pairs of pinnw, the lowest pair bearing single 
leaflets, the rest bearing six to eight pairs of leaflets. A. 30ft. to 
60ft. Northern United States, 1748. 
GYMNOGRAMME (from gymnos, naked, and 
gramma, writing; referring to the spore cases). In- 
cluding Ceterach (in part), Dictyogramme, Grammitis (in 
part), Pterozonium, Selliguea, and Trismeria. ORD. 
Filices. A genus consisting of about a hundred species 
of (except where otherwise stated) beautiful stove 
Ferns. Sori arising from the veins over the under 
surface of the frond, linear or linear-oblong, simple 
or forked. ‘Those species which have the under surface 
t 
Fic. 158. FROND OF GYMNOGRAMME CALOMELANOS CHRYSOPHYLLA. 
