Trichocentrum—continued. 
T. triquetrum (triquetrous). /., sepals and_ petals pale 
straw-yellow, the lateral sepals prolonged behind and adnate 
to the spur of the lip; A straw-yellow, irregularly variegated 
and almost suffused with orange; spur lsin. long; ovary 
triquetrous ; peduneles axillary, lin. long. Z. vertical, equitant, 
6in. long, 4in. broad, gradually tapering to the apex. Peru. 
(L. vii., t. 311.) 
TRICHOCLADUS (from (hriz, trichos, hair, and 
kladon, a branch; the plants are stellate-tomentose or 
villous). Syn. Dahlia (of Thunberg). Orv. Hamamelidex. 
A small genus (five species) of greenhouse, evergreen 
shrubs, all South African, and closely allied to the 
Witch Hazels (Hamamelis). Flowers usually white, 
monececious or dicecious, densely clustered in small heads 
or racemes; calyx five-parted; petals five; stamens five. 
Leaves opposite and alternate, entire; stipules incon- 
spicnous. Only one species calls for mention here. For 
culture, see Gardenia. 
T. grandiflorus (large-flowered).* jf. lsin. in diameter, 
crowded in short, axillary and terminal, sub-sessile racemes ; 
petals white, pink at base, strap-shaped, undulated. July. 
i. Zin. to 4in. long, shortly petiolate, ovate to ovate-lanceolate, 
caudate-acuminate, dark green above, paler beneath. 1890. 
A handsome shrub or small tree. (B. M. 7418.) 
TRICHODESMA. To the species described on p. 79, 
Vol. IV., the following should be added : 
T. physaloides (Physalis-like). (/., calyx purple, at length 
lin. to l4in. long; corolla pure white; pedicels at length lin. 
to 2in. long. /. glaucous-green, sessile, half-amplexicaul. 
Stem erect, angled. Rootstock fleshy. h. lft. to 2ft. South 
Africa, 1892. Greenhouse perennial. (G. ©. 1892, xi., 
p. 363, f. 51.) 
TRICHOGLOTTIS. JT. Dawsoniana is the correct 
name of Cleisostoma Dawsoniana. T. fasciata is now 
classed under Stawropsis. 
TRICHOMANES. Bristle Ferns. With the ex- 
ception of a few species which undoubtedly require more 
than greenhouse temperature, the Tirichomanes may 
without danger be submitted to the treatment recom- 
mended for Hymenophyllum. When not otherwise 
stated, they may be considered as thriving under the 
cool treatment recommended for Filmy Ferns generally. 
We may add that, whereas we do not advocate for either 
Hymenophyllums or ‘Todeas the use of stone, this 
material is essential to the well-being of certain 
Trichomanes. 
Fic, 727, TRICHOMANES PARVULUM. 
As will be noticed in the descriptions of the species, 
many of the plants are provided with rhizomes, and 
these are in most instances of a yery different nature 
from those of Hymenophyllums, as the greater part 
of them possess a very strongly-marked power of 
adhesion: it is for these species especially that the 
stone is necessary. While some of the kinds with 
slender, though equally hairy rhizomes, such as T. humile, 
T. pyxidiferum, T. trichoidewm, and T. venoswm, which 
in their natural habitats are usually found clothing Tree- 
fern stems, prefer rambling through decaying vegetable 
matter ; others, also provided with very slender rhizomes, 
prefer sandstone, or stone of a very porous and _ soft 
nature—this is particularly the case with such species 
THE DICTIONARY 
OF GARDENING, 
Trichomanes—continued. 
as T. Colensoi, T. easectum, T. parvulum (Fig. 727), 
T. tenerum, &c. Tt has been noticed, however, that 
species provided with stont, hairy, creeping rhizomes, such 
Fic. 728. TRICHOMANES JAVANICUM. 
as T. javanicum (Fig. 728) and T. radicans, thrive best 
when in close proximity to stone of a harder nature, to 
which they will cling with great tenacity. It may be 
well to note here that whenever stone is used it is 
necessary that a little peat of a sandy-fibrons nature 
should be placed at its base to establish the plant. 
The propagation of Trichomanes is usually effected by 
division of the rhizomes, although it also sometimes takes 
place by means of proliferons buds. For instance, 
T. pinnatum is conspicuously proliferous at the extremity 
of its fronds, where, when touching the ground, they 
frequently root of their own accord. In the same way a 
form of T. radicans, named proliferwm, found in Ireland, 
may be inereased by the rooting of the bulbils produced 
on the upper surface of its fronds. Trichomanes may 
also be propagated by means of spores, but this is a 
somewhat tedious process; in 1886 a batch of several 
hundred young T. radicans were raised in that way in 
Messrs. J. Veitch and Sons’ nursery at Chelsea, and, 
strange as it may appear, the species reproduced itself 
without any noticeable deviation whateyer from the 
normal form. The young plants thus produced had a 
much handsomer appearance than those resulting from 
the division of the rhizomes, as they grew more 
