28 
THE DICTIONARY 
OF GARDENING, 
Thevetia—continued. 
in fibrous loam. Propagation may be effected by cut- 
tings, inserted in sand, under a bell glass, in heat. 
T, Ahouai (Ahouai). jl. pale yellow, on thick pedicels; corolla 
ribbed, with spreading lobes ; pedicels thick, as long as the calyx ; 
cymes terminal, contracted, many-flowered. June. l. oblong- 
obovate, acute, acuminate at base, 4in. long, highly glabrous 
above, sparsely pilose beneath. A. 20ft. Brazil, 17359. SYN. 
Cerbera Ahouai (A. B. R. 231; B. M. 737). 
T, neriifolia (Oleander-leaved). Exile Oil Plant. fl. saffron- 
yellow, about 3in. long; calyx segments about half the length of 
the cylindrical part of the corolla, which is one-third the length 
of its enlarged throat; cymes sub-terminal, much shorter than 
the leaves, few or sometimes one-flowered. June. J. linear, 
glabrous, shining above, 3in. to 6in. long. h. 12ft. Tropical 
or ae and West Indies, 1735. SyN. Cerbera Thevetia (B. M. 
T, Vecotli (Yccotli). jl. similar to those of 7. neriifolia, Sin. 
long; corolla lobes three times the length of the tube; cymes 
sub-terminal, one to three-flowered. June. fr. green, warted, 
the size of a small apple. l. narrow-linear, acuminate at both 
ends, the margins revolute, glabrous above, slightly pilose be- 
neath. A, 8ft. Mexico, 1800. 
THIBAUDIA (named in honour of Thiebaut de 
Berneaud, Secretary of the Linnean Society of Paris, 
and a botanical writer). Orv. Vacciniacee. A genus 
to which only a couple of species are referred by 
Bentham and Hooker; they are very elegant, stove 
shrubs, natives of the Andes of New Grenada and Peru. 
Flowers searlet, pedicellate, numerous, in axillary racemes ; 
calyx tube continuous with the pedicel, terete, the limb 
short, obtusely five-lobed or five-toothed; corolla tubular, 
terete, the limb of five small, sub-erect lobes; stamens 
ten, as long as the corolla tube; pedicels bracteate at 
base, and sometimes bracteolate. Leaves alternate, per- 
sistent, petiolate or sub-sessile, coriaceous, penninerved, 
entire. The species thrive in a compost of turfy loam, 
peat, and sand. Cuttings will readily root in sand or 
soil, with or without the protection of a glass. Other 
species formerly included here will now be found under 
Proclesia, Psammisia, Themistoclesia, &c. 
T, floribunda (bundle-flowered). /l. glabrous, on very long 
dicels ; racemes solitary, nearly 2in. long, with imbricated 
racts at base. J. oblong-lanceolate, acuminate, reticulate- 
veined. Branches nearly terete, smooth, greyish. New 
Grenada. | 
T. pichinchensis (Pichinchan). fl. seven lines long; calyx 
furfuraceous-tomentose, the teeth mucronulate ; corolla glabrous ; 
racemes shorter than the leaves. Jl. very shortly petiolate, oval- 
oblong or sub-lanceolate, obtuse and acuminate, rounded at 
base, din. to 4in, long. h. 6ft. to 12ft. Pichincha, 1849. 
THICK-LEAF. A common name for Crassula 
(which see). : 
THIEBAUTIA. A synonym of Bletia (which see). 
THIMBLEBERRY. See Rubus occidentalis. 
THINNING-OUT. A common term which refers 
to the work of reducing the number of seedlings of any 
description when they are too much erowded for the 
proper development of all. It should be attended to 
amongst seedlings, at an early stage, if it is necessary 
at all, else the whole lot may become drawn, and thereby 
weakened. Thinning-out also applies to the cutting of 
shoots or branches—as, for instance, on fruit-trees—and 
to the reduction in quantity of various other subjects 
— the space is only available for a portion of the 
whole. 
an : . A common name for the species of 
ae Carduus and Cnicus, and other plants. a 
THISTLE, BLESSED. See Silybum Marianum. 
aa racial See Qnopordon Acan- 
| THISTLE, GLOBE. Se Echinops. 
i 
| 
| 
| 
| 
| 
| 
-rosulate; cauline ones hastate-auriculate. 
THISTLE, HOLY. See Silybum Marianum. 
THISTLE, MELON. See Melocactus. 
THISTLE, OUR LADY’S MILK. See Silybum 
Marianum. 3 
THISTLE, SOW. See Sonchus. ; 
THLADIANTHA (from thladias, compressed, and 
anthe, a flower; owing, it is said, t® the plant being 
first described from a pressed specimen’). ORD. 
Cucurbitacee. A genus including three or four species of 
climbing, greenhouse or hardy herbs, natives of North 
China, Java, and the Himalayas. Male flowers golden, 
rather large, solitary or racemose ; calyx tube shortly 
campanulate, the bottom shut by a horizontal scale, the 
segments five, lanceolate ; corolla campanulate, five- 
parted, the segments revolute about half-way down; 
filaments five. Female flowers solitary; calyx and corolla 
as in the males; ovary oblong; style deeply trifid, with 
three reniform stigmas. Fruit green, oblong, fleshy, 
many-ribbed. Leaves ovate-cordate, with a deep sinus, 
denticulate. T, dubia, the only species introduced, 
will thrive in almost any soil, but perhaps succeeds best 
when planted against a sunny wall. 
T, dubia (doubtful).* f/i., males approximate ; calyx teeth very 
narrow; petals gin. long; filaments minutely hairy; racemes 
2in. to din. long, with ‘prominent bracts; female peduncle 2in. 
to 3in. long, more or less hairy, the ovary densely woolly. 
fr. sin. by łin., glabrous, obtuse at both ends. J. deeply 
cordate-ovate, acute, undivided, 4in. by 2sin., denticulated, not 
angular, usually villous beneath; petioles lin. to lin. long. 
Hardy. India and China, 1864. (B. H. 1872, 6; B. M. 5469; 
in both these figures, however, the female flower and fruit 
belong to another species. 
THLASPI (probably from Thlaspis, the old Greek 
name for Cress, used by Dioscorides, from thlas, to bruise ; 
its seeds being bruised as a condiment). Bastard Cress ; 
Besom Weed; Penny Cress. ORD. Crucifere. A genus 
comprising from twenty-five to thirty broadly-distributed 
species of annual or perennial, seapigerous herbs. Flowers 
white, pink, or pale purple, racemose. Radical leaves 
None of the 
T. alpestre, T. arvense 
species are worth cultivating. i 
and T. perfoliatum are 
(Boor’s or Mithridate Mustard), 
British weeds. 
THOMASIA (named in memory of Peter and Abra- 
ham Thomas, collectors of Swiss plants in the time of 
Haller). ORD. Sterculiacee. A genus comprising twenty- 
five species of very elegant, Australian, greenhouse shrubs, 
with the habit of Lasiopetalum, but with the leaves often 
lobed or cut. Flowers often tomentose; calyx usually 
purple, bluish, or white, fivd-lobed; petals none, or 
minute and scale-like; stamens five, alternate with the 
sepals, free or slightly connate at the base; bracts narrow, 
deciduous; bracteoles under the calyx three; racemes 
leaf-opposed, simple or rarely cymosely branched. Sti- 
pules leafy. The under-mentioned species are well worth 
cultivating in every collection. They thrive in a compost 
of loam, peat, and sand, Cuttings of the ripened wood 
will root freely in sand, under a glass. 
T. foliosa (leafy). f. small, on slender pedicels; petals none ; 
racemes numerous, often branched, slender, hirsute. June. 
l. petiolate, ovate-cordate, deeply sinuate-lobed, rarely above lin. 
long, sprinkled with stellate hairs above, more densely hirsute 
beneath. h. 3ft. 1825. 
T. glutinosa latifolia (glutinous, broad-leaved). f. pink, 
retty, disposed in racemes ; stamens, as well as a blotch at the 
fase of the petals, dark brownish. Summer. l. stalked, cordate, 
acute, covered with stellate hairs. 1885. An attractive plant. 
(R. G. 1186.) - 
. grandiflora (large-flowered). jl., calyx red, spreading to about 
lin. in diameter, not divided to the middle ; petals none ; racemes 
terminal. June. l. mostly ovate-lanceolate or oblong, or the 
lowest ovate, obtuse, in. to lin. long, entire, cordate or obscurely 
three-lobed at base, glabrous or sprinkled with a few stellate 
hairs. h. 3ft. 1840. ; 
T, macrocarpa (large-fruited).* fi., calyx red, opening to about 
lin. in diameter, Veen woolly-hirsute cutside: racemes tamen- 
_ tose-hirsute, few-flowered. June. J. broadly ovate-co: ” 
