AN ENCYCLOPADIA 
OF HORTICULTURE. 
Thunbergia—continued. 
long, falcate-elliptic, often coherent on one side, purplish-green. 
Spring. J. elliptic, acuminate, toothed, cuneate or rounded at 
base, 6in. long, palmately three-nerved. Branches pendent. 
Mysore, 1854. An extensive climber. Syn. Heaacentris myso- 
rensis (B. M. 4786; F. d. S. 752, 942; L. J. F. iii. 285; R. G. 280). 
T. natalensis (Natal). f. horizontally drooping, large, hand- 
some ; corolla tube yellow, 2in. long, curved upwards ; limb blue, 
large, the lobes obcordate, horizontally spreading; peduncles 
axillary, solitary, erect, single-flowered. July. J. opposite, the 
pairs rather approximate, sessile, ovate, acute or sub-acuminate, 
sinuate-serrate, glabrous above, hairy on the midrib and veins 
beneath. Stem erect, 2ft. or more high, shrubby below. Natal, 
1857. (B. M. 5082.) 
T. Vogeliana (Vogel’s). f. deep bluish-violet, with a -yellow 
throat, about as large as those of T. erecta, but of greater sub- 
stance. Summer. J. large, ovate or oblong, narrowed or rounded 
at base, dark green. Fernando Po, 1865. A handsome, erect- 
growing species.. SYN. Meyenia Vogeliana (B. M. 5389 
THUNIA. Included under Phaius (which see). 
THUYA (from Thwia, the old Greek name used by 
Theophrastus). Arbor-Vite. Sometimes spelt Thuja. 
Including Biota. Chamecyparis is included, by Bentham 
and Hooker, under Thuya, but for garden purposes it is 
kept distinct in this work. OrRp. Conifere. A genus 
comprising about a dozen species of hardy, evergreen 
trees or shrubs, natives of North America and extra- 
tropical Eastern Asia. Flowers monecious; males ter- 
minal, solitary; female catkins ovoid or oblong, rarely 
globose. Leaves small, opposite, scale-like, appressed, 
quadrifariously imbricated, all sub-equal, or those on the 
flattened branchlets deeply keeled. Cones ovoid or 
oblong, rarely globose; mature ones rarely exceeding 
gin. in length. The species are readily raised from 
seeds, sown in spring, under glass, and the seedlings 
afterwards hardened off and planted out in the open 
ground. Cuttings, too, of half-ripened shoots, are easily 
struck ; these may be put in heat, under bell glasses, 
or kept in a cool, shaded frame. About the middle of 
August is perhaps the best time for propagating without 
heat. Some of the variegated and other dwarf-growing 
forms are frequently grafted on seedling stocks of the 
common types. 
T. acuta (acute). A synonym of T. orientalis. 
T. Doniana (Don's). A synonym of Libocedrus Doniana. 
T. gigantea (gigantic).* White Cedar. J. in alternate, opposite 
ee pet fy mr those on the branches more distant, 
decurrent, acute; those on the branchlets very flat, closely 
placed, irregularly imbricated in four rows, much shorter, more 
rounded, spiny-pointed, cones small, oval, tapering to both ends, 
nodding, solitary at the extremities of the smaller branchlets. 
Branches s reading, irregularly scattered ; branchlets flattened, 
short, slender, flexible, undivided. A. 50ft. to 150ft. North-west 
America. A fine, graceful tree. See Fig. 28. 
T. g. atrovirens (dark green). Branches spreading ; branchlets 
open, broad, and flat. A fine, robust, very dark glossy-green 
variety. i 
T. g. erecta (erect). A much closer and more upright-growing 
kind than the type. i 
T. g. pumila (dwarf). A distinct variety, more diffuse in habit 
than the type, and al smaller in all its parts; the branchlets 
are also much closer-set, and of a brighter green. 
T. g. Variegata (variegated). A handsome, variegated variety, 
wiih a considerable priid of the branchlets pale yellow, dis- 
tributed irregularly all over the plant. 
T. gigantea (gigantic), of Carrière. A synonym of Libocedrus 
decurrens. 
T. lætevirens (pleasing green). A synonym of, Thuyopsis dola- 
brata lætevirens. A DE 
T. occidentalis (Western).* American Arbor-Vitæ; White Cedar. 
. very small, e phi pairs, ovate-rhomboid, blunt-pointed, 
closely imbricated and flattened, thickly ‘pressed along the 
branchlets in four rows; those on the older branches more 
distant, acute, decurrent, dull yellowish-green. cones obovate, 
żin. long, on short footstalks. Branches distant, horizontal, 
irregularly scattered along the stem ; branchlets laterally spread- 
ing. h, “oft. to 50ft. North America, 1596. A large bush or 
. Gordon, in “The Pinetum,” enumerates the following 
varieties : rat i 
T. o. alba (white). Tips of the young branchlets silvery-white 
during spring and ay summer. ; : 
T. 0. argentea (silvery), Some of the branchlets in this variety 
are silvery-white. ; 
Vol. LV. 
Thuya—continued. 
T. o. aurea (golden). 
American origin. 
T. o. compacta (compact). Bagshot Park Arbor-Vite. <A 
conical-shaped and very compact variety. 
T. o. cristata (crested). Branchlets small, deep green, closely 
arranged, spreading, frequently recurved, cockscomb-shaped 
towards the ends of the branches. 
T, o. densa (dense). l. regularly imbricated, ovate, compressed, 
poen; quadrifarious, Branches short, stout, compact ; 
ranchlets horizontal, flat, fan-shaped, of a rich, glossy colour, 
T. o. Elwangeriana (Elwanger’s).* l. dimorphous, scale-like, 
and closely imbricated in four rows, or linear, acute, and spread- 
ug oe sub-erect ; branchlets slender. A dwarf-growing, 
ense bush. 
A nice, golden, self-coloured variety, of 
Fic. 28 THUYA GIGANTEA. 
lobular). A dwarf, dense, globular bush, re- 
2 ing the E except in size. 
T. 0. (slender). Branches long and slender, drooping 
; all sides; branchlets open, rather thinly placed, 
nen with rather long, slender, bright green sere Ay A 
distinct variety. SA gogi 
Hoveyi (Hovey’s). l. ovate, i green, closely im ricated 
on a oc, flat. Spray strap-shaped. A round, com- 
pact bush. 
ndulous). Principal branches along the main 
T., o, pendula (pe ). pin ad 
stem in a reverted position ; more densely clustered or 
o 
