Stems
Stem type
Classification based on type of perrenial structure.
bulb | A short, erect, underground stem surrounded by fleshy leaves. |  |
caudex | A short, thick, vertical or branched perennial stem usually subterranean, or at ground level. |  |
cladophyll | A flattened main stem resembling a leaf. |  |
corm | The enlarged, solid, fleshy base of a stem with scales; an upright underground storage stem. |  |
culm | Flowering and fruiting stems of grasses and sedges. | |
pseudoscape | A false scape where not all of the leaves are truly basal in origin, though they may appear to be so superficially. A true scape is a leafless peduncle arising from ground level, usually from a basal rosette in acaulescent plants. |  |
rhizome | A horizontal underground stem. |  |
tuber | A thick storage stem, usually not upright. |  |
vine | An elongate, weak-stemmed, often climbing annual or perennial plant, with herbaceous or woody texture. |  |