Narrow and much longer than wide, with parallel margins. The current interpretation differs from that of Lindley.

Having a narrow leaf, four to five times as long as wide, with more or less parallel sides.

A botanical term meaning narrow or slender.

Long and narrow, the sides being parallel and the length at least eight times the width, tending to be an elongated rectangle.

Very long and narrow, so that they look as though they could be drawn with a single line, such as the leaves of chives.

Able to be represented by a straight line.

Very long and narrow, such as the leaves of most grasses; in botany, used for any leaf with length more than about 9 times the width.