LEA 
A two-edged Leaf (Anceps) is one which has two pro- 
minent angles, running lengthways on a convex difk. 
A three-cornered Leaf ( 'Triquetrum ) has three longitu- 
dinal plain Tides like an awl-ftiaped Leaf. 
A three-edged Leaf ( ‘Trigonal ) is much like the former, 
but in this the ribs are fharp and membranaceous, 
the lurface of the Leaf being channelled. When a 
Leaf has four or five angles, it is called tetragonal 
and pentagonal, &c. 
A furrowed Leaf ( Sulcatum ) is one that has feveral 
ridges running lengthways, which have obtufe finufus, 
fig. 59. 
A keel -fh aped Leaf ( Carinatum ) is one that has the 
under part of the difk prominent the whole length, 
and the upper concave like the keel of a boat. 
A membranaceous Leaf ( Membranaceum ) is one wholly 
compofed of membranes, without any apparent pulp 
between. 
A compound Leaf ( Compqjitum ) in general means one, 
which is formed of feveral final! Leaves Handing upon 
one foot-ftalk, but thefe Leaves are divifible again to 
the ftrufture and pofition of the fmall Leaves. 
1 ft, Into fuch as are properly and diftin&ly called 
compound Leaves ; 2dly, the decompound ; 3dly, the 
fupradecompound, of each of thefe in its place. 
In defcribing thefe kinds of Leaves, the whole Leaf 
which is the refult of the combination, is confidered 
as one Leaf, called ( Folium ) and the fmall leaves which 
together compote it ( Folioli ) or lobes. 
A Ample compound Leaf, is one whofe Ample foot- 
ftalk bears more than one Leaf. 
A jointed one (Articulation) is when one Leaf grows 
out of the point of another, fig. 60. 
A fingered Leaf ( Digit atum ) is one which is compofed 
of feveral fmall Leaves joining to one foot-ftalk at 
their bafe, fpreading open like the fingers of a hand, 
fig. 61. 
A two-lobed Leaf (. Binatum ) is one with two fmall 
Leaves on one foot-ftalk, fig. 62. 
A three-lobed Leaf ( Ternatum ) is one with three fmall 
leaves, which is frequently called a trifoliate Leaf, 
fig. 63. 
A cinquefoil Leaf (SJuinatum) has five fmall Leaves 
on the fame foot-ftalk. 
A winged Leaf ( Pinnatum ) is one which has many 
fmall Leaves, ranged on each fide a fingle foot-ftalk 
like wings ; of thefe there are feveral kinds. 
An unequal winged Leaf (Pinnatum cum imp are) is a 
winged Leaf, terminated by an odd lobe or (Folioli) 
fig. 64. 
A clafper-winged Leaf (Pinnatum cum cirrho) is a 
winged Leaf ending with a tendril or clafper, fig. 65. 
An abrupt-winged Leaf (Abruptum) is a winged Leaf 
not terminated by an odd lobe or clafper, fig. 66. 
An oppofite-winged Leaf (Oppofite pinnatum) is when 
the fmall Leaves or lobes are placed oppofite on the 
midrib. 
An alternate-winged Leaf (Alternatim pinnatum) is 
when the fmall Leaves ftand alternate. 
An interrupted-winged Leaf (Interrupts pinnatum) is 
when there are fmaller lobes intermixed with larger 
upon the fame midrib, fig. 67. 
A jointed-winged Leaf (Articulate pinnatum) is when 
the common foot-ftalk is jointed, fig. 68. 
A running-winged Leaf (Decur/ive pinnatum) is one 
whofe fmall Leaves run along the foot-ftalk from one 
to another, fig. 69. 
A conjugated Leaf (Conjugatum) is one which has but 
two fmall Leaves on the fame foot-ftalk. 
We next proceed to the decompounded Leaves. 
A decompounded Leaf (Decompojitum) is one whofe 
foot-ftalk is once divided, and joins together many 
fmall Leaves. 
A double conjugated Leaf (Bigeminatum) is one whofe 
foot-ftalk divides in forks, and conneds four fmall 
Leaves on the top, or it is compofed of two conju- 
gations. 
A double trifoliate Leaf ( Biternaturn ) is one whofe 
foot-ftalk is divided, and each divifion fuftains three 
fmall Leaves, fig. 70. 
LEA 
A double- winged Lea I (Bipinnatum) is one whole foot- 
ftalk is divided, and thefe divisions have fmall Leaves 
ranged on their fide like wings, fig. 71. 
A foot-ftmped or branched ‘Leaf (PedatunA is one 
whole foot-ftalk is divided, and has feme fmall Leaves 
placed on the inner fide, as. in Pa#jora and Arum" 
fig. 72, 
A gi eater compounded Leaf (Supra decompojitum is 
one whole foot-ftalk is many times divided, and each 
divifion is garnifhed with fmall Leaves. ' 
A triternate Leaf (Triternatum) is one whofe foot-ftalk 
connects three double trifoliate Leaves. 
A triple- winged Leaf ( T'ripinnatum ) is one compofed 
or feveral double-winged Leaves; ifth.de are termi- 
nated by two fmall Leaves, they are laid to be abrupt 
fig. 73. but when they are terminated by an odd onc-% 
they are called an irregular, triple, winged Leaf, fio 
We next come to confider the diftindtions of Leaves 
from their place, pofition, infertion, or their direction 
when joined to the other parts of plants. 
A feed Leaf ( Seminole ) is the firft Leaf of the plant, 
and is what former writers called cotyledones ; thefe. 
are different in form and fubftance from the" other 
Leaves, fig. 75. 
A bottom Leaf (Radicate) is one whofe foot-ftalk rifes 
immediately from the root. 
An upper or ftalk Leaf ( Caulinum ) is one which -rows 
from the ftalk of the plant, fig. 76. G 
An axillary Leaf (Axillare) is one which grows from 
the infertions of the branches, fig. 77. 
A flower Leaf (Florale) is one that is inferted near 
the flower, and never appears but with it, fig. 78. 
A ftarry Leaf (Stellate) fig. 79. or whorled Leaf ( Vcr- 
ticillata) is when feveral Leaves are difpofed in whorls 
round the ftalk, fig. 80. 
Oppofite Leaves (Oppcjita) are when thofe upon the 
ftalks ftand by pairs on each fide, fig. 81. 
Alternate Leaves (Alternd) are when they ftand alter- 
nate above each other, fig. 82. 
Sparfed Leaves (Sparfa) are fuch as ftand without order 
over the whole plant. 
Clufter Leaves ( Conferta ) are fuch as come out from 
the fide of the branches in clufters, and are fo clofe 
to one another, that it is not eafy to dilcover their ex- 
ad fituation, fig. 83. 
Imbricated Leaves (Imbricata) are fuch as are placed 
over each other like tiles on a houfe, or the fcales of 
fifties, fig. 84. 
Fafciculated Leaves (Fafciculata) are fuch as grow in 
clufters from the fame point, fig. 85. 
Diflicha is when the Leaves are ranged along only 
upon two fides of the branches, as in the Fir-tree. 
A target or fhield-fhaped Leaf (Pelt atum) is one whofe 
foot-ftalk is fixed to the diik, and not to the bafe or 
edge of the Leaf, fig. 86. 
Petiolatum is when the foot-ftalk is inferted to the 
bafe of the margin, fig. 87. 
Seftile is when the Leaf fits clofe to the ftalk or branch, 
and has no foot-ftalk, fig. 88. 
A running Leaf ( Decurrcns) is when the Leaf adheres 
to the ftalk or branch, and is extended along the ftalk 
from the bafe, fo as to form a leafy border on each 
fide the ftalk, fig. 89. 
Amplexicaule is when the bafe of the Leaf environs 
or embraces the fides of the ftalk entirely, fig. 90. 
Semiamplexicaule , is when the bafe of the Leaf reach 
but half round the ftalk. 
A perfoliate Leaf (Perfoliatum) is one which is per- 
forated by the ftalk or branch, which do not touch 
the margin, fig. 91. 
Ccnnatum , is when the two oppofite Leaves cohere 
at their bafe, fo as to form one body embracing the 
ftalk, fig. 92. 
Vaginans , is when the bafe of the Leaf forms a kind 
of cylinder, embracing the ftalk like a (heath, as in 
Com, Grafs, fig. 93. 
The direction of Leaves. 
An adverfe Leaf (Adverfum) is one whofe fides refped 
the meridian and not the heavens, as the Ginger, &c. 
Aa 
