Glossary

A

Aerial Root

A root that grows above the soil, out of a stem or trunk, used for climbing, anchoring, or absorbing moisture from the air.

Also called: air root

Aroid

Any plant in the Araceae family, recognized by a distinctive flower structure called a spathe and spadix. Includes Monstera, Philodendron, Pothos, and ZZ plant.

Also called: Araceae, arum family

C

Cultivar

A plant variety that was selected or bred by humans for specific traits, like leaf color, size, or growth habit, and is maintained through controlled propagation.

Also called: cultivated variety, cv.

D

Dormancy

A period of reduced growth and metabolic activity, usually triggered by lower light, cooler temperatures, or seasonal changes.

Also called: dormant period, winter dormancy

E

Epiphyte

A plant that grows on another plant for physical support, without taking nutrients from it. Not a parasite.

Also called: air plant, tree-dweller

F

Fenestration

Natural holes or splits that develop in the leaves of mature plants, most commonly seen in Monstera species.

Also called: leaf holes, leaf splits

H

Humidity

The amount of water vapor in the air, measured as a percentage. Many tropical houseplants prefer 50-70% relative humidity.

Also called: relative humidity, RH

L

Leaf Node

The point on a stem where a leaf attaches. Same as a node - the spot from which leaves, roots, and new growth emerge.

Also called: node, growth node

N

Node

The point on a stem where leaves, roots, and new branches emerge. Critical for propagation.

Also called: growth node, leaf node

P

Perlite

Expanded volcanic glass that looks like small white balls. Added to potting mix to improve drainage and prevent compaction.

Also called: volcanic glass, soil amendment

Petiole

The stalk that connects a leaf blade to the stem. Not a stem itself - it's the bridge between the stem and the leaf.

Also called: leaf stalk, leaf stem

Photosynthesis

The process by which plants convert light, water, and carbon dioxide into sugar for energy. Light is the fuel, not just a preference.

Also called: light energy conversion

Potbound

A plant whose roots have outgrown its container, filling the pot so densely that they circle the bottom or push through drainage holes.

Also called: rootbound, pot-bound

Propagation

Creating a new plant from a piece of an existing one. Methods include stem cuttings, division, air layering, and seed.

Also called: plant propagation, cloning

R

Rhizome

A thick horizontal stem that grows underground (or along the surface), storing energy and producing new shoots and roots.

Also called: rootstock

Rootbound

Another term for potbound - when roots have filled the container entirely and have no room left to grow.

Also called: root-bound, potbound

S

Sport

A spontaneous genetic mutation in a single branch or shoot that produces different leaf color, pattern, or growth habit from the rest of the plant.

Also called: bud sport, chimera

Substrate

The material a plant grows in - soil, bark, sphagnum moss, perlite, or any combination. What you put in the pot instead of (or alongside) standard potting mix.

Also called: growing medium, potting medium, soil mix

T

Transpiration

The process by which plants release water vapor through tiny pores (stomata) in their leaves. Plants are constantly losing water to the air.

Also called: water vapor release, stomata

V

Variegation

Patches of white, cream, yellow, or pink on a leaf caused by cells that lack chlorophyll.

Also called: variegated, sport

Botanical Glossary

A