AN ENCYCLOP/EDIA 
OF HORTICULTURE. 439 
Dalechampia— continued, 
threads, which give a singular appearance to its blossoms, |. 
біп. to 9in. long. lin, to i wide at the broadest portion, very 
shortly stalked, sub-cordate, ae towards the base, acuminate 
at the apex. Vera Cruz, -— oe а к» bine эче Д ра. 
This species differs from the majority of its congeners іп being 
erect, not climbi , апа in its undivided leaves. (B. M. 5640.) 
There is a variety (alba) with white bracts. 
DALIBARDA (named after Denis Dalibard, a French 
botanist). ORD. Rosacem. Low perennials, with creeping 
and densely-tufted stems or rootstocks. The species 
described below is a very pretty slow-growing little alpine 
or rock-plant, thriving in deep, peaty soil, in a rather 
sheltered position. Propagated by divisions. 
D. cordata (cordate). A synonym of D. repens, 
D. fragarioides (Strawberry-like) A synonym of Waldsteinia 
Jragarioides. 
(creeping). fl. white, on scape-like peduncles. May and 
J wn ag cordate, obtuse, crenated, pubescent. Stems creeping. 
North America, 1768. Syns. D. cordata and D. violeoides, 
D. violzoides (Viola-like). А synonym of D. repens. 
DALMATIAN CAP. See Tulipa. 
DALRYMPLEA. A synonym of Turpinia (which 
вее). 
DAMASK ROSE. Se Rosa damascena. 
DAMASK VIOLET. See Hesperis matronalis. 
DAMES ROCKET. See Hesperis matronalis. 
DAMES VIOLET. See Hesperis matronalis. 
DAMMARA (its native name in Amboyna). Dammar 
Pine. ORD. Coniferm. А genus of large handsome coni- 
fers. Leaves petiolate or almost sessile, sub-opposite 
and coriaceous. Cones ovate or globular, and axillary; 
scales persistent, bractless. The proper name of this 
genus is now Agathis, that name having been given by 
Salisbury long before Lambert published that of Dammara. 
There are about ten species hitherto described ; they are 
natives of the Malayan Archipelago, Fiji, New Caledonia, 
New Zealand, and Eastern tropical Australia. All the 
species require a greenhouse temperature. Cuttings of 
ripe, firm shoots, inserted in sand, in spring, will root, 
in a gentle bottom heat. 
D. Southern) Kauri Pine. Z. linear-obl , rarel 
dipae teres both 17:8 from ЫЙ to 2hin. long, and iin. to d 
broad at the widest part, thick, coriaceous, of a X Ls. -brown 
colour. Branches large, spreading, numerous, distant. smooth, 
divided into numerous smaller ones. h. 120ft. to 150%. New 
Zealand, 1821. 
D. obtusa (blunt-leaved). 1. variable in shape, mostly oblong, 
rounded at the ends, 3lin. to 4in. long, 1}їп. broad, thick, leathery, 
dark glossy green. A. 150ft. New Hebrides, The timber 
of this tree is extensively employed in Shipbuilding. 
D. orientalis (Eastern). Amboyna Pine. 
oblong, entire, rous, of a thick, coriaceous texture, from 2in. 
to 4in. long, ind nearly ljin. broad at the widest part, straight, 
falcate, dull green on both surfaces. Branches 
ie aprendo, A aR ам eee toe A ioon tes; branch 
olu e yielding 
the transparent resin Dammar. 5359.) There is a 
longer and more lanceolate leaves, with the edges more larly 
rolled up on the under  Sligh ulated, Е 
bark, al; is of a mush white ond = vh "- 
DAMMAR PINE. See Dammara. 
DAMNACANTHUS (from damnao, to conquer, and 
acanthos, a spine; in reference to the strong opposite 
spines). ORD. Rubiacem. A genus containing two or 
three species of greenhouse shrubs, with branching habit, 
They thrive in rich sandy loam and peat. Propagated by 
cuttings, inserted in sand, under a bell glass, in bottom heat, 
D. maj . whi -scented, axillary and i 
or re. үй EI dut nee Amore y Ws inge ex 
one to four-seeded. 1. small, opposite, coriaceous, sub-sessile, 
acuminate : stipules interpetiolar, tricuspidate, Spines acicular. 
Japan, 1868. 
D; m. submitis (nearly unarmed). Л. white. Spines very small. 
Japan, 
DAMPIERA (named in honour of Captain William 
Dampier, R.N., the celebrated circumnavigator, who paid 
&reat attention to natural history in all his voyages). 
Dampiera—continued. 
ORD. Goodenoviem. Greenhouse suffruticose herbs or 
shrubs, Flowers axi or terminal, sub-spicate or 
solitary ; corolla bilabiate. They grow freely in a mix- 
ture of turfy loam, turfy peat, and sand. Cuttings strike 
readily, planted in the same kind of soil, with a hand 
glass placed over them. There are upwards of thirty 
species, all from Australia, very few of which are in 
cultivation in this country. А 
D. Brownii (Brown's) fl. blue; corollas densely clothed with 
black plumose hairs; peduncles solitary or clustered in the upper 
axils. July. l petiolate, oval, nearly entire, flat, scabrous above, 
h. lft. to 2ft. 1824. Plant suffruticose, erect, clothed with 
scurfy tomentum. Syn. D. ovalifolia. 
D. ovalifolia (oval-leaved). А synonym of D. Brownii. 
DAMPING. This is practised in all plant houses in 
summer, and in tropical houses at all times. It is abso- 
lutely necessary in these instances, and in most others 
where much fire heat is employed, to preserve sufficient 
moisture in the atmosphere for the well-being of the plants. 
The floor and walls of the majority of glass structures, 
especially forcing houses, may be frequently damped in 
spring and summer. 
great importance 
towards good cultivation. It is not advisable to throw 
and, although its application fre- 
quently beneath or around plants may prove beneficial 
in dry weather in summer, it may be destructive in 
many cases to wet the foliage each time, especially when 
the sun is shining. 
DAMPING OFF. This term is applied to the pre- 
mature decay of the leaves, flowers, or stems of plants. Its 
effects are most marked on young and tender seedlings, 
when crowded together, or placed under unsuitable atmo- 
spheric conditions. Sometimes the cause may be traced to 
an excess of moisture that may be suspended in the air or 
applied to the roots. Damping off amongst cuttings is 
often caused by allowing them to become dry, апа then 
suddenly applying too much water. The water is generally 
blamed when the actual cause is drought, and the sudden 
change subsequently caused by the water. A temperature 
in а glass house or Propagating frame lower than that 
outside, in either case will cause Damping by the condensa- Pe 
colder, like the house. Raise the temperature and the 
moisture becomes Immediately Damping is 
de amongst tender seedlings, they should be sepa- — 
ly in fresh soil. This will invari- 
ably check it, but the operation is best performed before 
‚ causes, some unknown, affe 
different plants, and bring about their destruction in 
way; but the primary ones are those here indicated. 
DAMSON. See remarks under FER АЮ. 
DANAA. A synonym of Physospermum (which se). 
DANZA (named after Pierre Martin Dana, a writer 
on the plants of Piedmont) Овр. Filices. 1 А remark. 
able and distinct genus of stove ferns, not very exten- 
sively cultivated, Rhizomes woody. Fronds pinnate, 
rarely simple, fleshy, coriaceous; pinnm usually articu. 
lated. Sori linear, occupying the whole length of the 
veins, and crowded so as to cover the whole under surface 
of the divisions of the fertile fronds. For general culture, 
see Ferns, Gi: 
> sn fronds 2in. to біп. 10; barren 
Ponds Ктр) W dcn XR yt 
innze on each aide: central ones al talked, 3in. to Sin. longs 2 
in. broad, the ape acuminate, serrated, the base round 
fertile fronds on a longer stipe, the рішие stalked у, 
lin. to in, long, acute or E. ca. iovis M 
given аз posable inhabitants of our stoves: elliptica, Morit 
ud ned і 
more distinctly, — 
