"Aculeus.--A prickle or sharp point, from the bark." -Newman, 1850

Aculeus

"Aculeus.--A prickle or sharp point, from the bark." -Newman, 1850

"Anceps.--Two-edged." -Newman, 1850

Anceps

"Anceps.--Two-edged." -Newman, 1850

An articulated or jointed stem.

Articulated Stem

An articulated or jointed stem.

A climbing stem.

Climbing Stem

A climbing stem.

A creeping stem.

Creeping Stem

A creeping stem.

A square stem.

Square Stem

A square stem.

A triangular stem.

Triangular Stem

A triangular stem.

A twining stem, or vine.

Twining Stem

A twining stem, or vine.