labellum (10 images): lip.

labiate: lipped; generally in compounds such as bilabiate.

lacerate: torn, or with an irregularly jagged margin.

laciniate (3 images): cut into narrow and generally unequal segments.

lactiferous: with a milky latex.

laminar: thin and flat, as in a leaf blade.

lanate (3 images): woolly.

lanceolate (4 images): lance-shaped.

latiseptate (4 images): with a septum that spans the broadest distance of a laterally compressed fruit (see angustiseptate).

latex: a colorless to more often white, yellow, or reddish liquid produced by some plants.

leader: tip of a shoot, typically the dominant stem of a plant.

leaflet (7 images): an ultimate unit of a compound leaf.

legume (12 images): the fruit of a member of the Fabaceae, composed of a single carpel, typically dry and dehiscing down both sutures; a plant of the family Fabaceae.

lemma (5 images): one of the two bracts (lemma and palea) subtending the individual flowers in grass spikelets.

lenticel (6 images): a slightly raised area in the bark of a stem or root.

lenticular: shaped like a double-convex lens.

lepidote: scaly; covered with small scales.

ligulate (12 images): having a ligule.

ligule (10 images): term applied to the flattened part of the ray corolla in the Asteraceae and to the appendage on the inner (upper) side of the leaf at the junction of blade and sheath in many Poaceae and some Cyperaceae.

limb (8 images): the expanded part of a gamopetalous corolla above the throat; the expanded part of any petal.

linear (2 images): line-shaped; long and narrow with more or less parallel sides.

livid: lead-colored, bluish gray.

lobe (11 images): a projecting segments of an organ.

locule (1 image): a seed cavity (chamber) in an ovary or fruit.

loculicidal: dehiscing along the midrib or outer median line of each locule.

lodicule: one of the tiny scales at the base of the ovary that may represent a vestigial perianth in grasses.

loment: a legume composed of 1-seeded joints.

lunate: crescent-shaped.

lutescent: yellowish in color.

lyrate: pinnatifid, with the terminal lobe evidently the largest and generally rounded.