In plants what other leaf formation are there?

Question

In plants what other leaf formations are there...for example; Raceme & alternate?

Answer 1

Hi UKman,

Raceme refers to an unbranched, elongated inflorescence with pedicellate flowers which mature from the bottom upwards.  I am assuming that you want the terms that describe the position of leaves with regard to a plant's stem.

According to "A California Flora and Supplement" by Philip A. Munz and "Plant Identification Terminology, An Illustrated Glossary" by James G. Harris and Melinda Woolf Harris, the types of leaf formations are:

Alternate (borne singly at each node)

Basal (positioned at or rising from the base)

Cauline (arising from the stem above ground level)

Decussate (arranged along the stem in pairs, with each pair at right angles to the pair above or below)

Dextrose (turned to the right or spirally arranged to the right)

Distichous (in two vertical ranks or rows on opposite sides of an axis)

Equitant (overlapping or straddling in two ranks; as seen with an Iris)

Opposite (borne across from one another at the same node)

Rosette (a dense radiating cluster of leaves usually at or near ground level)

Rosulate (leaves arranged in basal rosettes with the stem very short or lacking, as seen with lettuce and some succulents)

Sinistrorse (turned to the left or spirally arranged to the left)

Verticillate (arranged in verticils; interchangeable with Whorled)

Whorled (leaves of three or more from a node, interchangeable with Sinistrorse)

I hope this helps.

Hiking Tony

Answer 2

i am not sure whether u r asking about phyllotaxy or not.

phyllotaxy 3 types

1. alternate

2. opposite[ superposed, decussate]

3.whorled

raceme n all belongs to infloresence