General Terms

Herb

Plant whose above-ground growth is mostly herbaceous (non-woody) and therefore dies back at the end of growing season

Annual herb

Live for only one growing season

Biennial herb

Live for 2 years

Perennial herb

Have persistent stems or roots underground (rhizomes or bulbs) or just at the soil surface (stools, corms, caudices)

Tree

Woody perennial of considerable stature at maturity with one or a few main trunks

Shrub

Woody perennial, smaller than a tree, usually with several basal stems

Shoot apex

Internode

Node

Axillary bud

Lateral branch

Lateral roots

Root apex

Shoot

Root

Shoot tip

Shoot apical meristem

Leaf primordium

Vein

Bud primordium

Root tip

Root hairs

Vascular cylinder

Root apical meristem

Root cap

Adventitious root

Prop root

Haustorial root

Alternate 2-ranked

Opposite 2-ranked

Opposite 4-ranked

Whorled

Alternate spiral

Basal leaves

Blade

Primary vein (midrib)

Secondary veins

Petiole

Bud

Stipules