APPW key feature pages

Leaf shape

Leaf shape is highly variable, and not easily categorizable into distinct states. It may be particularly difficult, for example, to decide if your leaf is ovateovate:
(adj) egg-shaped in outline; generally with the broad end at or near the base
or lanceolatelanceolate:
(adj) lance-shaped; widest point below the middle, tapering to the apex
(or obovateobovate:
(adj) ovate, with the narrow end at the base
or oblanceolateoblanceolate:
(adj) lance-shaped, with attachment at or near the narrow end. (compare lanceolate)
) versus ellipticelliptical:
(adj) in the form of an ellipse (oval)
or oblongoblong:
(adj) two to four times longer than wide, with +/- parallel sides
. It may help to keep in mind that ellipticelliptical:
(adj) in the form of an ellipse (oval)
and oblongoblong:
(adj) two to four times longer than wide, with +/- parallel sides
shapes are symmetrical on either side of a horizontal midline and widest at the middle, whereas lance-shaped (lanceolatelanceolate:
(adj) lance-shaped; widest point below the middle, tapering to the apex
or oblanceolateoblanceolate:
(adj) lance-shaped, with attachment at or near the narrow end. (compare lanceolate)
) or egg-shaped (ovateovate:
(adj) egg-shaped in outline; generally with the broad end at or near the base
or obovateobovate:
(adj) ovate, with the narrow end at the base
) shapes are not symmetrical about a horizontal midline, and are widest above or below it.

Choose the state or states that best match your specimen. For compoundcompound:
(adj) with two or more like parts, as in a compound leaf; divided into two or more subsidiary parts or orders, as in a compound inflorescence
leaves, this feature is scored for both leaf and leafletleaflet:
(n) one of the leaf-like units of a compound leaf
shape.

orbicular
broadly ovate to obovate-oblanceolate
quadrangular or rhombic
triangular
 
cordate or reniform
sagittate or hastate
elliptic to oblong
linear to lanceolate
 
linear -- long and flaccid
linear -- fine and needle-like
tubular
APPW key feature pages