DEC DEL 
DEL DEN 
Decumbent, lying down. 
Decurrext, running down. 
Dbcursitb, having a tendency to run down. 
Decussate, when two right lines cross each other 
at right angles, they are said to be decussate. 
DkerixgTa, R. Brown. In memory of Dr. Charles 
Deering, an English botanical author. Linn. 5, 
Or. 1, Nat. Or. Amarantacea:. Curious but weak- 
growing plants. The seed requires to be sown in 
a hothouse, or hotbed, and when of sufficient size, 
the plants may be potted off, and placed among the 
stove plants. 
celosioldw . . . White . 9, S. B. E. Ind. . . 1804 
indIcA .... -White . 10, & B. E. Ind. . . 1804 
Deflexed, turned downwards. 
Dekoliatus, deprived of leaves. 
DeoraphTs, Trinius. Derived from dU, twice, and 
grapho, to mark. Linn. 3, Or. 2, Nat. Or. Graminece. 
\V orthless species of grass, growing in any common 
soil, and increased by divisions at the roots. Sy~ 
nonymes : 1. Phalaris arundinacea. 2. Arundo colo- 
rata — americana 1, arundindcid 2, variegdta. 
Dehiscent, gaping; an expression applied to the 
mode in which the anthers or the fruit burst open, 
and discharge their contents. 
Delesseria, Lamour. In honour of M. Benjamin 
Delessert, a famous French botanical patron. Linn. 
24, Or. 7, Nat. Or. Algue. Beautiful species, of 
mostly deep green AlgcB, found in the ocean, and on 
the sea,-&)\OTe—aldtd, A. angmtUslmd, A- dilatdtd, 
BonnemaisOnf, glandulOsd, hypoglOssQm, lacerdtd, 
ocelldtd, PlocdmiUm, punctdtd, rtucifOlld,tangulnid, 
tinuOsd. 
DrtIma, Linn. From deiimo, to file, or shave off; 
tHeleaves are used for polishing. Linn. 13, Or. 1, 
Nat. Or. Dilleniacece. Very fine climbing plants, 
growing best in loam, peat, and sand mixed ; 
ripened cuttings root in sand, under a glass, in 
heat. 
nWdS .... 8. Er. CL Trinidad . 1830 
sarmeiitdsA, 1 . . Yellow . S. £v. CL Ceylon . . 1820 
Dei.iqubscent, melting away upon exposure to air. 
DelphIniOm, Linn. From delphin, a dolphin; in re- 
ference to the supposed resemblance in the nectary 
of the plant to the imaginary figures of tlie dolphin. 
Linn. 13, Or. 3, Nat. Or. RanunculacecB. All the 
species of Larkspur are showy, and valuable as 
border flowers, especially D. j^jacU and Consolida, 
both of which are universally grown among the 
border annuals. The herbaceous and perennial 
kinds are increased by divisions, or seeds, and the 
annual and biennial kinds merely require sowing 
in the open border, where they will flower and seed 
freely. D. Consolida is regarded as a simple astrin- 
gent. Sy nonymes : 1. D. tridactylon. 2. D. hir- 
sutum. 3. D. intermedium. 4. D. junceum. 6. D. 
ambiguum. 
AconlU .... Purple . 6, H. A. Levant . . 1801 
Ajilols .... Pink . . 6, H. A. SwitzerL . l.‘)73 
flure-pl^nO . Varieg. . 6, H. A. Europe . .1573 
alhiflorum . . . White . 7, H. Her. P. Armenia . 1823 
alpinum . . . Blue . . 7, H. Her. P. Hungary 1816 
alUtIcum . . . Blue . . 7, H. Her. P. AJtaia . 1829 
amblgiium . . . Blue . . 6, H. A. Barbary . 1759 
ammiium . . ..Pa. blue . 7» H. Her. P.. S beria . 1818 
azuream . . * Lgt. blue 7> H. Her. P. Carolina . 1805 
Barlbwll . . . Dk. blue. 8, H. Her. P. Eng. hyb. . 
cardiopetAlfim . . Blue . . 6, H. A. Pyrenees . 1818 
cheilAnthum . . Dk. blue . 5, H. Her. P. Siberia . . 1819 
multiplex . . Az. blue 7> H. Her. P. 
chinense . . . Blue . . 7> H. Her. P. China . . 1818 
ConsdlidS . . . Blue . . 4, H. A^ England 
fldre-pUuS . . Varieg. . 6, H. A] England 
cuneAtum . . . Blue . . 6, H. Her. P.* Siberia . . 18L6 
dasycArpum . . Blue . . 7, H. Her. P. Caucasus . 1819 
dictyocArpum . . Blue . . 7> H. Her. P. Siberia . .1817 
elAtum .... Blue . . 7, H. Her. P. Siberia . . 1597 
elegAns . . . Blue . . 7, H. Her. P. N. Amer. . 
flore-plSnS . . Blue . . 7, H. Her. P. N. Amer. . 1741 
exaltalum, 1 . . Blue . . 7, H. Her. P. N. Amer. . 1758 
fissum .... Blue . . 6, H. Her. P. Hungary . 1816 
flexudsfim . . . Blue . . 5, H. Her. P. Caucasus . 1820 
grandifldram . . Dk. blue . 7i H. Her. P. Siberia . . 1816 
album . . . White . 7, H. Her. P. Gardens . 1816 
flore-plAnd . . Dk. blue . 6, H. Her. P. 
pAllIdum . . Blue . . 6, H. Her. P. Gardens . 1820 
hybridum, 2 . . Blue . . 7, H. Her. P. Siberia . . 1794 
intermedium . . Blue . . 8, H. Her. P. Silesia . 1710 
coenilescAns . . Lt. blue . 7» H. Her. P. . 1836 
laxum . . . Blue . . 6, H. Her. P. 
leptostachyQin3 Blue . . 5, H. Her. P. Pyrenees . 
pallidum . . Blue . . 7. H. Her. P. . 1836 
piloslsslmum . Blue . . 7i H. Her. P. Siberia . . 
ranunculifOliam Blue . . 7i H. Her. P. Pyrenees . 
sapphirinum . Blue . . H Her. P. 
laxindrum ... Blue . . 7> H. Her. P. Siberia . 
AlenziesH . . . Blue . . 7, H. Tu. P. N. Amer. . 1826 
mesoleucum . . Blue . . 7, H. Her. P. . 1822 
siontAnum ... Blue . . 7, H. Her. P. SwitzerL . 1819 
bractedsum . . Blue . . 6, H. Her. P. S. Eur. . . 1816 
ochroleucum . . White . 6, H. Her. P. Iberia . . 1823 
OliveriAnam . . Blue . . 6, H. A. S. Eur. . . 1826 
palmatifidum . . Blue . . 7. H. Her. P. Siberia . . 1824 
glaheUum . . Blue . . 6, H. Her. P. Siberia . . 1817 
pentAgynum . . Blue . . 7i H. Her. P. S. Eur. . . 1819 
peregrinum, 4 . . Blue . . 7. H. A. Italy . . 1629 
pictum .... Lgt. blue 6, H. B. S. Eun . . 1816 
pseudo-peregrinum Red . . 6, H. Her. P. Siberia . . 1823 
pubesceus, 5 . . Blue . . 8, H. A. Medilerr. . 1816 
punlcAum . . . Purple . 7, H. Her. P. Siberia . . 1785 
Reqtiienli . . . Blue . . 7, H. B. Majorca . 1824 
revolutum . . . Pa, blue . 4, H. Her. P. 
speciusum . . . Blue . . 7, H. Her. P. Caucasus . 1816 
spurium . . . Blue . . 8, H. Her. P. Siberia . . 1810 
StaphisAgriA . . Lgt. blue 7, H. B. S. Eur. . . 1596 
tenulssimum . . Purple . % H. A. Greece . . 1835 
tricdrnA .... Blue . . 7, H. Her. P. N. Amer. . 1806 
triste .... Blue . . 7> H. Her. P. Dahuria . 1819 
urcenlAtum . . Blue . . 6, H. Her. P. . 1801 
vel itinum . . . Blue . . 7. H. Her. P. Italy . . 1819 
villosum . . . Blue . . 7> H. Her. P. Caucasus . 1818 
vimlneum . . . Blue . . 8, H. Her. P. N. Amer. . 1835 
virgatum . . . Blue . . 6, H. A. Syria . . 1823 
DEI.TA-I.EAVED, shapcd like the Greek 
Deltoides, triangular. 
DematiGm, Persoon. From a diminutive of dema, a 
bundle ; in reference to the mode of growth. Linn. 
24, Or. 9, Nat. Or. Fungi. An extremely minute 
species of Fun^i, of a bluish colour, foimd on the 
stems ofherbs in autumn — articuldtdm. 
Demulcent, having the property of softening any- 
thing. 
DendrSbTGm, Swartz. From dendron, a tree, and 
bios, life ; in the places of their natural growth, the 
^ecies are generally found upon trees. Linn. 20, 
Or. 1, Nat. Or. Orchidaceas. No orchidaceous plants 
contribute more to the gaiety of the stove, than the 
species of this splendid genus. D. nobile, chrysan- 
thum, Gibsonii, Jimbrialum, dens\florum, and many 
others, are equaled by few, and certainly not sur- 
passed, in the beauty of their flowers, by any other 
orchidaceous plants ; and if the following directions 
be attended to, they will be found very easy of 
culture ; — All orchidaceous plants require (to culti- 
vate them successfully), a season of growth, a 
season of rest, and a season for flowering; all of 
which should coincide, as much as possible, with 
the corresponding seasons of those parts of the globe 
which they so profusely inhabit ; and the species of 
this genus should especially be subjected to a change 
of treatment assimilating as much as possible to 
that before mentioned, without which, they will 
never flower in perfection. In India, three sea- 
sons only are known ; the hot, or dry season, which 
is succeeded by the rainy season, and the cold, or 
winter season. In the hot season, all, or the 
greater part, of the plants belonging to this genus 
produce their flowers ; in the rainy season, they 
make their shoots ; and during the cold season, 
they have a period of repose. The different seasons 
being so well known, it is very easy to imitate 
them in our hothouses, and by attending to these 
simple rules, we should be enabled to flower the 
species of this more abundantly than those of any 
other orchidaceous genus, besides which, they 
might be easily induced to flower in this country 
at any season of the year. D. chrysanthum. Pie- 
rardii, and some others, grow well when fastened 
singly on pieces of wood, and treated as is recom- 
mended under Bnrlingtonia ; but they all succeed 
well when potted in very turfy peat, raised above 
the pot, in the same way as is recommended in 
potting Stanhopeas. A strong moist heat is indis- 
pensaMe in the growing season, when they maj’ be 
frequently slightly syringed over-head. They will 
be found to succeed best in a warmer part of the 
house than the Stanhopeas require. They are pro- 
pagated by detaching one or more of the stems 
while in a dormant state, taking care not to injure 
the roots, and potting it carefiilly in turfy peat 
soil, and not much raised above the pot, which 
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