The body is black or dark brown, elongated and somewhat cylindrical.

Eggs are typically 8.2 mm and 4 mm wide, with a somewhat cylindrical shape.

It is spherical or somewhat cylindrical in shape.

They are somewhat cylindrical, ornamented with lobed warts, and measure 9.9 by 3.7 μm.

Each flower head is somewhat cylindrical or bullet-shaped, measuring up to about a centimeter long.

Each leaf is made up of many tiny lobes which are reduced so as to form a solid mass, making the leaf somewhat cylindrical.

Each disc floret is somewhat cylindrical and protruding.

They have slender, somewhat cylindrical bodies, and heads that resemble those of lizards.

The inflorescence is a dense, somewhat cylindrical array of flower spikes up to 4 or 5 centimeters long.

B. bulbosa had a slender somewhat cylindrical rostrum (guard) with a slightly expanded front opening.