Sedimentary Rocks. The Basics. Sedimentary rocks are classified in three main groups: clastic, chemical, and organic. Each group forms in a very unique way by completely different processes. Read on to discover more about these rocks and how they came to be. Clastic Rocks.
sprig. 1. a small spray of a plant with its leaves, flowers, etc. 2. an ornament having the form of such a spray. 3. a shoot, twig, or small branch. 4. a scion; heir. 5. a youth. 6. a headless brad. 7. to mark or decorate with a design of sprigs.
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified. A spike is a type of raceme with flowers that do not have a pedicel. 2  A racemose corymb is an unbranched, indeterminate inflorescence that is flat-topped or convex due to their outer pedicels which are progressively longer than inner ones.