292 THE DICTIONARY OF GARDENING, 
Centaurea—continued. 
C. pulchra (beautiful).  /..heads bright purple, globose; outer 
scales of involucre drawn Es into an ovate, pectinately ciliated, 
scabrous appendage; middle bristle longer, stiffer and shining. 
August. l. sessile, glabrous, pinnate ; lobes linear, acute, entire 
or a little toothed. Stem branched, furrowed. h. lft. Cashmere, 
1838. Half-hardy. (В. R. 26, 28.) - 
ragusina (Ragusan).* /.-heads yellow; involucre ciliated, 
June, July. 1 downy with silvery hairs, pinnatifid; segments 
obtuse, egg-shaped, quite entire, outer ones largest. д, 2ft. 
Candia, 1710. Half-hardy perennial. (B. M. 494.) 
C. ruthenica (Russian). /l.-heads pale yellow; involucre scales egg- 
Shaped, obtuse. July. f pinnate, smooth ; leaflets cartilaginous, 
sharply serrate ; terminal one oblong, egg-shaped. h. 3ft. Orient, 
1806. Hardy perennial. 
C. suaveolens (sweet-scented).* Yellow Sultan. Л.-Һеайз yellow, 
Sweet-scented ; involucre round, smooth. July. Z, lower ones 
broad, somewhat o Gm ae toothed ; row ones lyrate at base. 
^. lift. Levant, 1683. Hardy annual. (S. B. Е. G. i. 51.) 
C, uniflora (one-flowered). Л.-һеайв purple, roundish terminal, 
nearly sessile among the "p r leaves. Sae. 1, small, white 
and downy; lower ones o ong lanceolate, toothed ; upper ones 
теты УЫ entire. А. 9ín.tol5in. South Europe, 1824. Hardy 
perennial, 
CENTAURY. See Erythrea Centaurium. 
CENTAURY, AMERICAN. А common name for 
the species of the genus Sabbatia. 
. CENTOTHECA (from kentein, to prick, and theke, a 
receptacle ; in allusion to the retrorse hairs of the upper 
florets). ORD. Graminem. А genus containing two or 
three species, distributed over tropical Africa and Asia, 
and the Pacific Islands. It is a somewhat near ally of 
Melica. A compost of well-drained loam and leaf soil 18 
best. Propagated by seeds, sown in spring. 
©. (bur-like), Bur, Inflorescence paniculate: spi 
pe : eei os erdt ge owered, green? pedicels hia f 
dry Indis. cx a к, =. NUN long, about jin. 
CENTRADENIA from 
kentron, a spur, and T a 
gland; referring to a spur-like 
gland on the anthers), Syn. 
Plagiophyllum; Orp. Melas- 
tomacee. Stove evergreens, 
Flowers pink or white ; Tacemes 
few-flowered, axillary. Leaves 
opposite, unequal, ovate or 
lanceolate, entire, membranons, 
three-nerved. They thrive in 
4 compost of one part sandy 
loam, and two parts Tough peat. 
Cuttings of side shoots should 
be inserted in February. 0. 
I oe makes an elegan 
ОЁ it last 
Centranthus-— continued. 
rockwork; and are readily increased by seeds, which, 
for show annuals, should be sown in March. 
C, angustifolius (narrow-leaved), Л. red, }in. long; spur one- 
half shorter than the tube of the corolla. May to J uly. . linear- , 
lanceolate, quite entire. h. lft. to 2ft. South Europe, 1758. 
Hardy perennial. SYN. Valeriana angustifolia. (S. F. G. 29.) 
C. Calcitrapa (Caltrops-like). fl. white, tinged with red, rather 
panicled. May to July. l, radical ones ovate, entire, or lyrate ; 
upper ones pinnatifid. A. біп. to lft. South Europe, 1683. Hardy 
annual. SYN. Valeriana Calcitrapa. (S. F. G. 30.) 
macrosiphon (large-tubed).* fl. rosy-carmine, rather larger 
than those of C. ruber. July. 1. glaucous. k. 26. Spain. An 
annual, of compact habit. See Fig. 401, (P. F. G. 67.) Of this 
there is a white-flowered variety. 
Й 
the tube; cymes dense, forming a handsome corymbose panicle. 
Summer. J. ovate or lanceolate ; upper ones unequal at the base, 
toothed a little. A. 2ft. to 3ft. urope (Britain) Perennial. 
There are several forms, including a white-flowered variety, of 
species. 
CENTRONIA (from kentron, a spur, in allusion to the 
spurred anthers), ORD. Melastomacem. A genus of highly 
ornamental shrubs, from Mexico, New Granada, Guiana, 
and Peru. There are nine species; in all probability, that 
described below is the only one now in cultivation. А 
compost of sandy peat and leaf mould suits them well. 
Propagated by cuttings of half-ripened shoots, inserted in 
peat and sand, under a bell glass, 
tinged with violet to thoroughly agree with specific name; in 
i 
E 
C. ruber (red)* Red Valerian. Л. red; spur one-half shorter than 
C. hzemantha (blood-coloured) fl. deep Bixplish-red, too much А 
wi 
panicles, large. Z, shortly stalked, elliptic-obovate, five-nerved, / 
Ocafia, 1852. 
reddish-brown beneath, deep green above. h. 8%. 
Greenhouse. SYN. Calyptraria hemantha. 
CENTROPOGON (from kentron, a spur, and pogon, 
a beard; in reference to the fringe which envelops the 
stigma). ORD. Campanulacem. Ornamental greenhouse 
or stove herbaceous perennials. The most popular member 
of this genus is a hybrid between C. fastuosus and Sipho- 
campylos betulæfolius, and known as C. Lucyanus. From 
its flowering naturally during the dead of the winter, itis a 
most desirable plant; and it is more particularly this to 
which the cultural remarks refer. The ready way this 
plant admits of increase is much in its favour, as amateurs 
will find no difficulty in propagating it. Any young shoots, 
about 3in. or 4in. long, form good cuttings, and, if taken 
off with a heel, root with more certainty, although others 
rarely fail if placed in sharp sandy soil, close around the - 
edge of the pot, and then kept close under a bell ‘glass 
amount of drainage, and to add sufficient sand when potting | 
to keep the soil open and porous. During the early spring 
months, a cool stove is the best situation for them, but with 
the advent of summer a pit or frame is the most suitable. 
