Leaf Shapes

From the Wikipedia article here

Acicular (acicularis): Slender and pointed, needle-like
Acuminate (acuminata): Tapering to a long point
Aristate (aristata): Ending in a stiff, bristle-like point
Bipinnate (bipinnata): Each leaflet also pinnate
Cordate (cordata): Heart-shaped, stem attaches to cleft
Cuneate (cuneata): Triangular, stem attaches to point
Deltoid (deltoidea): Triangular, stem attaches to side
Digitate (digitata): Divided into finger-like lobes
Elliptic (elliptica): Oval, with a short or no point
Falcate (falcata): sickle-shaped
Flabellate (flabellata): Semi-circular, or fan-like
Hastate (hastata): shaped like a spear point, with flaring pointed lobes at the base
Lance-shaped, lanceolate (lanceolata): Long, wider in the middle
Linear (linearis): Long and very narrow
Lobed (lobata): With several points
Obcordate (obcordata): Heart-shaped, stem attaches to tapering point
Oblanceolate (oblanceolata): Top wider than bottom
Oblong (oblongus): Having an elongated form with slightly parallel sides
Obovate (obovata): Teardrop-shaped, stem attaches to tapering point
Obtuse (obtusus): With a blunt tip
Orbicular (orbicularis): Circular
Ovate (ovata): Oval, egg-shaped, with a tapering point
Palmate (palmata): Divided into many lobes
Pedate (pedata): Palmate, with cleft lobes
Peltate (peltata): Rounded, stem underneath
Perfoliate (perfoliata): Stem through the leaves
Pinnate (pinnata): Two rows of leaflets
odd-pinnate : pinnate with a terminal leaflet
paripinnate, even-pinnate : pinnate lacking a terminal leaflet
Pinnatisect (pinnatifida): Cut, but not to the midrib (it would be pinnate then)
Reniform (reniformis): Kidney-shaped
Rhomboid (rhomboidalis): Diamond-shaped
Round (rotundifolia): Circular
Sagittate (sagittata): Arrowhead-shaped
Spatulate, spathulate (spathulata): Spoon-shaped
Spear-shaped (hastata): Pointed, with barbs
Subulate (subulata): Awl-shaped with a tapering point
Sword-shaped (ensiformis): Long, thin, pointed
Trifoliate, ternate (trifoliata): Divided into three leaflets
Tripinnate (tripinnata): Pinnately compound in which each leaflet is itself bipinnate
Truncate (truncata): With a squared off end
Unifoliate (unifoliata): with a single leaf
[edit]Notes

^ a: Or to be more precise, the "leaf" consists of two joined leaves united around the stem. The term perfoliate still applies.