A BOTANICAL GLOSSARY

with particular emphasis on terms pertaining to the study of carnivorous plants

(rev 1.5 Part R)
Peter Cole - September 1996
Copy freely unaltered for non-commercial purposes.

Glossary Index.

raceme (n)
a flower cluster composed of individual florets equally spaced along a stem - often cymose

radical (adj)
emerging from the root

radicle (n)
the embryonic root; a rootlet

reclinate (adj)
curved backwards

reflexed (adj)
abruptly reclinate

regular (adj)
composed of evenly arranged parts in a symmetrical fashion

reniform (adj)
kidney-shaped; an oval with the ends curved around in the same direction

repandate (adj)
undulate, but less evenly so

reticulate (adj)
forming a network (often of leaf-veins); multiply divided

retuse (adj)
a rounded termination with a small notch forming two small lobes; slightly emarginate

rhizome (n)
an underground plant structure from which both roots and shoots emerge directly

rhomboid (adj)
diamond-shaped

rib (n)
a leaf-vein; a ridge of plant-tissue thicker than its surrounding

ringent (adj)
of a monopetalous corolla where the lip of which is unequally divided; appearing in the form of a gaping animal

root (n)
a plant structure usually providing a plant with anchorage and the ability to absorb water and nutrients from the soil

rosette (n)
a circular growth-pattern with leaves growing radially from a central point; rose-shaped

rostellate (adj)
beaked; tapering in a long, hard point

rostrate (adj)
beaked; tapering in a long, hard point

rosulate (adj)
forming a rosette

rotate (adj)
wheel-shaped

rotundate (adj)
rounded; imperfectly orbicular; in the form of, or terminated by, an arc

runcinate (adj)
in the form of overlapping arrowheads, the backwards-facing barbs usually curved, eg: a dandelion


(c) Peter Cole 1995

I originally wrote much of this file to help me understand many of the terms employed in Danser's Nepenthes monographs and Obermeyer's work on South African Drosera (both on the CP web site.) I have probably missed a few due to the sheer size of the works. If there any words you feel should be included or redefined (not necessarily from Danser or Obermeyer,) feel free to Email me at:

carnivor@bunyip.demon.co.uk