leaves Flashcards
acicular
needle-shaped
cordate
of the shaped of the stylized heart, with the petiole attached between the basal lobes
deltoid
the shape of an equilateral triangle
elliptic
oval, the ends rounded and widest at the middle
falcate
sickle-shaped
hastate
more or less arrowhead-shaped, but with the basal lobes divergent
lanceolate
lance-shaped, several times longer than wide; the sides curved, with the blade broadest below the middle
linear
several times longer than wide; the sides more or less parallel
obcordate
as in the cordate leaf, but the petiole attached at the point of the heart
oblanceolate
as in the lanceolate leaf, but the petiole attached at the narrow end
oblong
about two or three times longer than broad; rectangular with rounded corners
obovate
as in ovate, but the petiole attached at the narrow end
orbicular
circular or nearly so
oval
broadly elliptic, the length less than twice the width
ovate
the shape of the longitudinal section through a chicken’s egg, with the petiole attached at the broad end
reniform
kidney-shaped or bean-shaped
sagittate
arrowhead-shaped
spatulate
spatula-shaped
ciliate
with fine hairs on the margin
crenate
scalloped, the teeth blunt
dentate
with coarse angular teeth directed outward at right angles to the margin
denticulate
finely dentate
entire
not in any way indented, the margin featureless
serrate
with coarse saw-like teeth which post forward
serrulate
finely serrate
sinuate
wavy in and out, in the plane of the blade
acute
apex formed by two straight margins meeting at less than 90 degrees
acuminate
an acute apex whose sides are concave and taper to an extended point
aristate
an abrupt, hard, bristle-like point (awn)
attenuate
the apex drawn out into a long gradual taper
emarginate
with a shallow notch at the apex
mucronate
with a hard, short abrupt point (mucro)
obtuse
apex formed by two lines which meet at more than a right angle
rounded
the apex gently curved
truncate
the apex appearing chopped off
glabrous
without hairs
glaucous
covered with a whitish waxy bloom
punctuate
dotted with pin-point impressions or translucent dots
rugose
wrinkled
viscid
sticky
floccose
with tufts of soft hairs which rub off easily
tomentose
densely and softly matted
glandular
hairs with swollen tips, gland-bearing
hispid
with long, rigid, bristly hairs
hirsute
with rough or coarse, more or less erect hairs
pilose
with sparse, slender, soft hairs
puberulent
minutely canescent (fine hairs)
pubescent
downy; the hairs short soft, and erect
scabrous
rough to the touch because of coarse, stiff, ascending hairs
strigose
hairs sharp, appressed (close together), rigid, and often swollen at the base
villous
shaggy; the hairs long, slender, soft, but not matted