AN ENCYCLOPADIA 
TRILOBATE. Three-lobed. A Trilobate leaf, with 
ciliated margins, is shown at Fig. 104. 
Fig. 104. TRILOBATE LEAF, WITH CILIATED MARGINS, 
TRILOCULAR. Three-celled. 
TRIMERISMA. A synonym of Platylophus 
(which see). 
TRIMESTRIS. Existing for three months. 
TRIMEZIA (from treis, three, and merizo, to divide; 
in allusion to the trimerous division of the flower). Syns. 
Lansbergia, Poarchon, Remaclea, Xanthocromyon. ORD. 
Iridee. A genus embracing about half-a-dozen species of 
stove, bulbous plants, natives of the West Indies and South 
America. Flowers many in a spathe, pedicellate ; perianth 
tube none, the segments free, shortly unguiculate ; stamens 
opposite the outer perianth segments; spathe solitary, — 
terminal, or two or three at the axils of the floral leaves. 
Leaves few at the base of the stem, long, flat, and pro- 
minently ribbed, sometimes terete and Rush-like; floral 
one solitary, or the stem wholly leafless. Only one 
species has been introduced. For culture, see Iris. 
T. martinicensis (Martinique). f. four to six in a cluster; 
perianth segments bright yellow, very fugacious, the three outer 
ones gin. to 3in. long, mottled at the throat, the three inner 
much smaller ; scape equalling the leaves, with a single, reduced, 
clasping leaf. April. l., radical ones about six, erect, narrow- 
linear, 1ft. long, three to four lines broad, gradually narrowed to 
a point. West Indies, &c., Syns. Cipura martinicensis 
(Ref. B. 310), Iris martinicensis (B. M. 416), Lansbergia caracasana. 
TRINIA (named in honour of Dr. Karl B. Trinius, 
1778-1844, a Russian botanist). _ ORD. Umbelliferæ. A 
genus embracing seven or eight species of hardy, much- 
branched, perennial herbs, inhabiting the Mediterranean 
region and temperate Asia, one—T. vulgaris—being a 
native of Britain. Flowers yellowish or white, in com- 
pound, often few-rayed umbels. Leaves pinnately or sub- 
ternately decompound. The species are of no interest 
from a garden standpoint. 
TRINODAL. Having only three nodes. 
TRIODIA (from ireis, three, and odous, teeth; 
referring to the three-toothed glumes). Syn. Uralepis 
(erroneously spelt Uralepsis). Including Tricuspis and 
Tridens. ORD. Graminee. A genus comprising upwards of 
twenty species of greenhouse or hardy, perennial Grasses, 
natives of Europe, extra-tropical America, South and sub- 
tropical Africa, Australia, and New Zealand, a few being 
also fonnd in tropical America. Spikelets many-flowered, 
usually erect; glumes rather rigid, one to three-nerved, 
the two lower ones empty; panicle terminal, narrow or 
ample. Leaves narrow. T. decumbens (Heath Grass) is 
a native of Britain. Several species have been intro- 
duced, but they have no value from a garden standpoint. 
TRICGCIOUS, TRIOICUS. Having male flowers on 
one individual, females on another, and hermaphrodite 
on a third. 
TRIOLENA (from freis, three, and olene, the arm; 
alluding to the three processes from the base of the 
anthers). ORD. Melastomacee. A small genus (three 
species) of nearly glabrous, pilose or paleaceous, stove 
herbs, natives of Mexico, Venezuela, and New Grenada. 
Flowers disposed in scorpioid racemes or spikes; calyx 
tube short, at length three-winged, the lobes five ; petals 
five, obovate ; stamens ten, sub-equal ; anthers dissimilar. 
Leaves ample, petiolate, ovate or oblong. T scorpioides, 
a perennial with the habit of Bertolonia, is the only species 
OF HORTICULTURE. 91 
Triolena—continued. 
introduced. It requires a compost of rich, sandy loam 
and leaf mould, and a moist heat. Propagated by seeds ; 
or by cuttings, inserted in sandy loam, under a bell 
glass, in bottom heat. 
T. scorpioides (scorpioid-flowered). jl. disposed in ioid 
racemes at the tips of axillary eia aeia T an Roars obloug-batata. 
l. somewhat acuminate, lightly serrulated. Stem lin. or rather 
more in length, somewhat woody. h. 6in. Chiapas, 1859, g 
TRIONUM. Included under Hibiscus (which see). 
TRIOPTERYS (from treis, three, and pteron, a 
wing; the samaras are three-winged). ORD. Malpighiacee. 
A small genus (three species) of stove, climbing shrubs, 
inhabiting the West Indies and Mexico. Flowers blue or 
violet ; calyx five-parted, with eight glands; petals clawed ; 
stamens ten, all perfect, the alternate ones longer; racemes 
or panicles axillary and terminal; peduncles bracteate and 
bibracteolate at base. Leaves opposite, highly glabrous, 
łucid, veined, petiolate, without glands or stipules. It 
‘is doubtful whether the plants here described are still 
-in cultivation, as they are very shy flowerers in this 
country. A compost of peat and sand is best suited to 
their requirements. Propagation may be effected by 
ripened cuttings, inserted in sand, under a hand glass, 
in heat. : 
T. rigida (rigid). jl. blue; racemes distant, forming a loose 
panicle, May. 1. d, coriaceous, orbicular-obovate, elliptic, 
or oblong-linear, shining, with many parallel and anastomosing 
veins. West Indies, 1822. 
T, r. jamaicensis (Jamaica). 2. 4in. to lin. long, }in. to 4in. 
broad. 
T. r. lucida (clear). 
sixteen lines broad. 
TRIOSTEUM (from treis, three, and osteon, a bone ; 
alluding to the three bony seeds, or rather nutlets). 
Feverwort; Horse Gentian. ORD. Caprifoliaceæ. A genus 
comprising three species of hardy, perennial herbs; one 
is Himalayan and the others are North American. Flowers 
dirty white, yellow, or purple, often axillary, solitary or 
clustered, rarely spicate; calyx tube ovoid, the limb of 
five persistent lobes; corolla tubular-campanulate, the 
i. retuse or blunt, Liin. long, eight to 
tube gibbous at base; limb oblique, with unequal, im- 
bricated lobes; stamens five. Drupe two to (rarely) five 
or six-stoned. Leaves opposite, slightly connate at base, 
sessile, somewhat panduriform or obovate, entire. T. per- 
foliatum, the best-known species, thrives in a light, sandy 
soil with a little leaf mould. It may be multiplied by 
divisions of the plant, in spring; or by cuttings of the 
young shoots, inserted under a handlight, in the beginning 
of summer. 
T. perfoliatum (perfoliate-leaved), fl. br anoi pol mostly 
clustered, sessile. June. /r. orange-colour, żin. long. J. oval, 
abruptly narrowed below, downy beneath. h. 2ft. to 4ft. North 
America, 1730. Plant softly hairy. (S. B. F., G. ser. ii. 45.) 
TRIPARTED, TRIPARTITE. Parted to the 
base in three divisions, 
TRIPETALEIA. A synonym of Elliottia (which 
see). 
TRIPETELUS. A synonym of Sambucus (which 
see). 
TRIPHZENA. See Tryphena. 
TRIPHASIA (from triphasios, triple; alluding to the 
number of sepals and petals). ORD. Rutacew. A mono- 
typie genus. The species is a greenhouse, evergreen, 
spiny shrub. Its fruits, when ripe, have an agreeable, 
sweet taste; they are sometimes preserved whole in syrup, 
and are occasionally sent to this country from Manilla 
as Lime berries. The plant succeeds in a compost of 
turfy loam and peat, and requires careful watering in 
winter. Propagation may be effected by cuttings, inserted 
in sand, under a glass, in heat. 
'T, trifoliata (three-leaved), 
petals three, free, imbricated; 
pita Tits here: 
i eet- ted, solitary, ax : x three-lo oe 
ji. white, sweet-scen itary, oa ae ke ae sen 
