THE DICTIONARY OF GARDENING, 
Houlletia—continued. 
H, o. antioquensis (Antioquian). fl., sepals much broader than 
those of the type ; lip very long, somewhat sagittate, white, tinged 
with pale yellow; spike erect, many-flowered. Antioquia, 1870. 
An improvement on the type, with dark green leaves and pseudo- 
bulbs. (G. C. 1870, 12. 
H, picta Timesa Ji. cinnamon-brown, 3}in. in diameter; sepals 
narrow-oblong, tips rounded ; petals rather smaller, narrowed 
towards the base; lip shorter than the petals, jointed at the 
middle ; distal portion (epichyle) broadly-hastate, with the broad, 
blunt, deeply-channelled apex so recurved that the epichyle looks 
truncate; hypochile somewhat trapeziform, the sides produced 
backwards into long ascending spurs, that are rather shorter than 
the column; column yellow, blotched with brown on the back ; 
scape from the base of the pseudo-bulb, stout, ascending, green, 
six to ten-flowered; sheaths few, short; bracts linear-oblong, 
grean, deciduous; pedicel and ovary Zin. long. L, with the slen- 
er petiole, liin. to 2}in. long, elliptic-lanceolate, acuminate, 
plaited, green. Pseudo-bulbs tufted, about din. long, narrow, 
ovoid, compressed, grooved. New Granada. (B.M. ) 
H. tigrina (tiger-marked). fl., sepals greenish-yellow, barred with 
_ brown; petals smaller, rich yellow, barred with crimson; lip 
white, dotted with brown and barred with light purple. Pseudo- 
bulbs 2in. long, somewhat ovate, with long dark green obtuse 
leaves. Columbia, 1852. (I. H. 612.) 
H, vittata (striped). A synonym of Polycyenis vittata. 
HOUND’S TONGUE. See Cynoglossum. 
HOUSELEEEK. See Sempervivum tectorum. 
HOUSTONIA (named after Dr. W. Houston, 1695- 
1733, a writer on American plants). ORD. Rubiaceae. 
A genus comprising about twenty species of hardy herba- 
ceons perennials, for the most part natives of North- 
western America. Flowers white, purple, or blue, dimor- 
phous. Leaves opposite, broad or narrow. Houstonias 
stones on rockwork, where they will flower nearly all 
the year round. A compost of leaf soil and sand, rather 
moist, is most suitable.‘ H. cwrulea forms a pretty pot 
specimen under cold frame treatment, and may be used 
with good effect for surfacing the pots in which other 
hardy bare-stemmed plants are grown. Propagated by 
careful divisions, in autumn; or by seeds. 
Pig, 242. HOUSTONIA CHRULEA, 
H. cærulea (blue).* Blnets. /l. usually elegant, light blue, some- 
times white ; peduncles one-flowered, — corolla salver- 
shaped, żin. across, Early summer. J. ovate-lanceolate, attenu- 
ated at the base; radical ones spathulate, a little hairy. Stem 
erect, dichotomous, h. Sin, to 4in, Virginia, 1785. See Fig. 242. 
- (B: M. 370.) 
H, Qong-leaved). ji. lilac; stamens inclosed. 
Angust. A linear-oblong F — ta ing at base and 
See he pales, broad-ovate, entire or bi-tridentate. h. 6in. 
H. serpyllifolia (Thyme-leaved).* fi. white: aoa 
one-flowered, elongated. June to “y peduncl 5 
hairy. A. in. 1 (B. M. 2822.) ugust. onnie, rather 
are admirable little plants for growing between large 
HOUTTEA (named in honour of the late Louis Van 
Houtte, a celebrated Belgian nurseryman). Syn. Van 
Houttea. ORD. Gesneracew. A genus comprising three 
species of stove shrubs, natives of Brazil. Flowers scarlet 
or spotted; corolla tube cylindrical. Leaves opposite, 
crenulate, pale or canescent-tomentose underneath. For 
culture, see Gesnera, 
H. Gardneri (Gardner’s).* fl. red ; peduncles solitary, one-flowered, 
axillary ; three calyx — acuminate ; corolla downy,tubular; 
perigynous ring five-lo July and August. A. 2ft. 1841, 
Plant glabrous, (B. M. 4121, under name of Gesnera Gardneri.) 
H. pardina (leopard-spotted).* fl. orange, red; peduncles axil- 
lary, solitary, eL E RE corolla with curved tube and spotted 
spreading limb; calyx segments large, spreading; stamens ex- 
serted. August to October. 7. on short petioles, elliptic, thickish, 
serrate, glabrous above, tomentose beneath. `h. 14ft. 1847. Plant 
downy. (B. M. 4348, under name of Gesnera pardina.) 
HOUTTUYNIA (named in honour of Houttuyn, the 
celebrated virtuoso of Amsterdam). Including Gymno- 
theca. Syns. Anemia, Anemiopsis, and Polypara, ORD. 
Piperaceew. A genus comprising two or three species of 
greenhouse perennial herbs, one of which is from Cali- 
fornia, another is broadly dispersed through the Hima- 
layan region, China, and Japan, and a third is pro- 
bably from China. Flowers hermaphrodite, spicate, sessile 
between the bracts; spikes terminal, pedunculate, dense. 
Leaves alternate, broad or oblong, often cordate at base; 
stipules large, membranaceous. The species succeed in 
any light rich soil, and in a moist situation. Increased 
by divisions, or by seeds. 
H. californica (Californian). fl., spadix short, erect, conical, — 
clothed with hermaphrodite fiowers without any perianth, but 
subtended by an involucre of about six oblong, spreading, white 
bracts, of which the inner three are spotted with red, Summer. 
l. nearly all radical, long-stalked, sub-cordate at base, obtuse, 
entire. Stem hairy, longer than the leaves. California. (B. M 
under name of Anemiopsis californica.) 
J te, — ellipti leaflets, inserted imme- 
— below the oblong spadix, which consists of several naked, 
C is 
L prone -acuminate, alternate, 
more or less deeply notched at the base. Stem erect, mostly simple, 
zigzag, glabrous. Japan. (B. M. 2731.) 
HOVEA (named after A. P. Hove, a Polish botanist, 
and collector for Kew). Syn. Poiretia. ORD. Legumi- 
nose. A genus comprising eleven species of handsome — 
_ ornamental greenhouse evergreen shrubs, confined to Aus- 
tralia. Flowers blue or purple, in axillary clusters or 
very short racemes, or rarely solitary; petals clawed ; 
standard nearly orbicular, emarginate. Leaves alternate, 
simple, entire or prickly toothed, glabrous above, often 
tomentose underneath ; stipules setaceous, minute or none. 
Propagation is best effected by seeds, which should be 
sown in well-drained pots of sandy-peat soil, in spring, 
and placed in a gentle bottom heat. Cuttings are rather 
difficult to strike. The seedlings must, when large 
enough, be potted off in similar soil, and grown on in an- 
intermediate temperature, water being carefully adminis- 
tered, and the points pinched out when the plants are 
2in. or 3in. high, to induce a bushy habit. After they 
become established, plenty of air may be admitted, and 
a cool greenhouse temperature will suffice. Hoveas are 
very distinct and desirable plants, on account of their 
intensely-coloured flowers, which appear in spring. H. 
elliptica is most commonly seen; it has rather @ 
straggling habit, that requires to be corrected by pinch- 
ing and training when the plants are young. H. pungens 
is smaller-growing, and more compact. The plants are 
sometimes attacked by Scale, which should be removed 
by sponging, or by an insecticide. 2 
= Celsii (Cels’s), A synonym of H. elliptica. : 
ce i i ° 
on short pedicels, —— pn —— —— 
Fai a oa ae oak a ae encloon 
— . (BB. too.) : —— 
ea (elli +. ; , 
ma orten pamal io Sem p cee ond ert 
Sn, m ~ - 
to 4ft. 1818. SYN. H. Cebit. (B. M. 2005.) e: pime 
