78 THE DICTIONARY 
OF GARDENING, 
TRIBLEMMA. Included under Asplenium. 
HIUM. A synonym of Bulbophyllum 
(which see). 
TRIBULUS (Tribolos was the old Greek name used by 
Theophrastus, from treis, three, and bolos, a point; each 
i carpel is often armed with three or four large spines). 
Caltrops. ORD. Zygophyllee. A genus comprising about 
fifteen species of loosely-branched, stove, greenhouse, or 
hardy herbs, dispersed over the warmer regions of the 
globe. Flowers white or yellow, solitary, pseudo-axillary, 
pedunculate. Leaves stipulate, opposite, or by abortion 
alternate. Most of these plants, several of which have 
been introduced, are weedy-looking subjects, and in- 
teresting only to a botanist. T. terrestris, a South 
European plant, is shown at Fig. 92. 
TRICERAIA. A synonym of Turpinia (which 
see). 
TRICHÆTA. 
see). 
TRICHANTHA (from thriv, trichos, a hair, and 
anthos, a blossom ; alluding to the slender pedicels). ORD. 
Gesneracew. A genus of two species of stove, creeping 
or climbing shrubs, natives of Columbia. Flowers solitary 
or fascicled in the axils, pedicellate, ebracteate; calyx 
free, coloured, ciliated-plumose, five-parted; corolla dingy 
violet, the limb and tube striped or angled with five 
longitudinal, yellow marks; limb loosely oblique, of five 
short, equal lobes. Leaves opposite, very different, one 
being ovate or oblong and acuminate, and the other 
dwarf. T. minor, the only species known in gardens, 
thrives in well-drained pots of peat, leaf mould, and sand, 
and is readily increased by means of cuttings, inserted in 
pots of sandy soil, and plunged in bottom heat. 
be" minor (lesser). f., corolla 2in. long, tubular, sub-ventricose, 
rinite- , constricted above the base; limb obliquely four- 
lobed, the upper lobe ror with a club- shaped appendage ; 
peduncles one-tlowered. l, the large one shortly ate, ovate, 
acuminate, entire, hairy beneath, slightly succulent. Stem 
uae ing, Cire -FUE pilose or glabrous. 1864. (B. M. 
TRICHARIS. A synonym of Dipeadi (which see). 
TRICHILIA (from tricha, by threes; the ovary and 
capsule are usually trilocular). Orp. Meliacee. A genus 
comprising about thirty species of stove trees and shrubs, 
natives of tropical Africa and America. Flowers rather 
large for the order, disposed in axillary, many-flowered 
- panicles; calyx four or five-toothed or cleft; petals four 
or five, imbricated; staminal tube eight to ten-cleft or 
parted, rarely entire. Leaves trifoliolate or impari- 
pinnate ; leaflets opposite or alternate, often many-jugate, 
very rarely bijugate. A selection of the introduced 
X species is here given. They are not much grown, and 
| rarely flower in this country. A compost of loam and 
peat is most suitable. Propagation may be effected by 
cuttings of the ripened wood, with the leaves intact, 
inserted in sand, under a glass, in heat. 
T. glabra (smooth). A synonym of T. havanensis. : 
TT. havanensis (Havana). white, long-pedicellate, d ly 
Included under Trisetum (which 
` tubercle). 
Trichilia—continued. 
length vi the leaves, the divisions three to eleven-flowered. 
June. leaflets seven to ten-jugal, ovate-oblong, apapa at 
base, aie at apex, glabrous, the lower ones smaller. h. 15ft. 
to 20ft. Tropical America, 1870. Tree. (Ref. B. 298,) 
TRICHINIUM (from trichinos, covered with hairs ; 
alluding to the shaggy appearance of the blossoms). ORD. 
Amarantacew. A genus comprising about fifty species of 
greenhouse herbs, under-shrubs, or rarely small shrubs, 
limited to Australia. Flowers in dense, globular, ovoid, 
or cylindrical spikes, very rarely elongated and inter- 
rupted; perianth usually pink or straw-colour, with a 
short, hard tube and five hairy segments; stamens five, 
but usually one, two, or three, without anthers. Leaves 
alternate, narrow or tarely obovate. Only three species 
have been introduced. They are all perennials, and 
thrive under cool greenhouse treatment, in any rich soil. 
Loam, rotten manure, and sand, make a suitable compost. 
The plants do best on an airy shelf, in full sunlight, and 
should be watered freely during the growing season. After 
flowering, water should be almost entirely withheld. Pro- 
pagation is readily effected by means of the thick roots, 
which should be cut into pieces about lin. long, and 
inserted in sand, in bottom heat. 
T, alopecuroideum (Fox-tail Grass-like). A synonym of T. 
exaltatum. 
T. exaltatum (exalted). {i , perianth about łin. in diameter, the 
segments yellow, with dull red tips; spikes erect, on long 
peduncles, at length oblong-cylindrical, about 2żin. in ‘diameter. 
June, Z., radical and lower ones oblong-lanceolate, Sin. to Sin. 
long, contracted into yer petioles ; weer ones small, sessile. 
k. 2ft. to 3ft. 1838. A stout plant. (B. R. 1839, 28, under name 
of T, alopecuroideum.) 
no (Mangles’).* ft., perianth jin. to lin. long, the seg- 
mian mh pink or whitish pay spikes globular or ovoid, about 
peter, the coloured tips of the perianth protruding 
rou the long, white hairs. June. l., radical ones long-petiolate, 
varying from ovate to linear, obtuse or acute, lin. to $ ìn. long ; 
cauline ones few, narrow, very acute. Stems decumbent, ascend- 
mee Ge rarely erect, Sag to 12in. long. 1838. (B.M. 5448; F. d. S. 
C. 1864, p. 555; L H. 464; R. H. 1866, p. 291.) 
Ae Stirlingii (Stirling’s) Jl, perianth scarcely jin. long, the 
segments plumose, with pink tips; spikes globular, solitary as 
the ends of the stems or loosely paniculate, jin. to lin. 
diameter. June. /. lanceolate, oblong, or almost linear ; ine 
ones obtuse, shortly petiolate; upper ones small, more ’ acute, 
sessile. Stems long, procumbent or ascending, and (as well as 
the leaves) clothed with white hairs. 1838 
TRICHOCARPA. Included under Deparia (which 
see). 
TRICHOCAULON (from thriz, trichos, a hair, and 
caulon, a stem; alluding to the bristles that tip each 
ORD. Asclepiadew. A small genus (two species) - 
of dwarf-growing succulents, natives of South Africa. 
Flowers small, proceeding from the angles near the upper 
part of the stem, sub-solitary; calyx five-partite, the seg- 
ments acuminate; corolla deeply five-lobed; outer corona 
deeply bilobed. Leaves none. Stems dwarf, stout, fleshy, 
many-angled; angles tuberculate; tubercles tipped with a 
bristle. For culture, see Stapelia. 
T. piliferum (bristle-bearing). fl. jin. to 3in. in diameter, 
sessile in the furrows of the stem; corolla between funnel and 
bell-shape, pale yellow-red without, dark purple within. Branches 
tufted, straight, cylindric, simple, erect, proceeding from a short, 
stout rootstock. 1882. (B. M. 6759.) SYNS. Piaranthus piliferus, 
T 
J 
crowded in very short, umbe uliform panicles. June. l pei 
petiolate, three-jugate; leaflets sessile, opposite, obovate, 
cuneate at base, rounded or obtuse, sometimes slightly acumi- 
nate, at apee Mo opaque, somewhat Prane, h. 20ft. Havana, 
Bt or Shrub or tree. Syn. T. glabra 
hirta (hairy). Bastard O f 
pie aiun, variable, elliptic or ob oe coe 
ets five-j v ptic or oblo: ceolate, taper- 
the base, glabrous, the ie dk 
whitish ; panicles 
O ones h. 12ft. West 
yellowish, sweet-scented ; pedicels 
five-jugal, bli cay age tore 
e or oblo: in. long ; 
: ae gt ee er e haar 
BETI e or sub, (AB. R- SS; Hw Fas 
rae ce, es pee E a: rng daha a re 
pelia pilifera. 
TRICHOCENTRUM (from thriz, trichos, a hair, 
and kentron, a spur; alluding to the long, thin spur of 
the labellum), ORD. Orchidew. A genus including about 
fourteen species of stove, epiphytal Orchids, natives of 
tropical America. Flowers mediocre or rather large; 
sepals and petals sub-equal, free, spreading; lip at base 
connate with the column, forming a pitcher, produced 
into a descending spur, above the pitcher erect, biauri- 
culate or naked; lateral lobes scarcely dilated, nearly 
erect; column short, thick; pollen masses two, ovoid; 
scapes short, many-sheathed, one or rarely two-flowered. 
Leaves coriaceous, Stems very short, one-leaved, at 
wes thickened into a small, fleshy eer The 
