Visual Description
Palmate leaves have multiple leaflets that all originate from the same central point at the end of the leaf stalk (petiole), spreading outward like the fingers of a hand.
Key Characteristics
- All leaflets connect at a single point
- Leaflets radiate outward in different directions
- Usually 3-7 leaflets per leaf
- Creates a distinctive hand-like or star-like pattern
Variations
Simple Palmate
- Leaflets are not further divided
- Most common type
Compound Palmate
- Each leaflet may have its own subdivisions
- Less common in tropical species
Identification Tips
When identifying palmate leaves:
- Count the number of leaflets (typically 3, 5, or 7)
- Check if all leaflets meet at one point
- Look for symmetrical arrangement
- Note leaflet size and shape variations
Examples in Costa Rica
Several Costa Rican trees display palmate leaves:
- Ceiba (Ceiba pentandra): Palmate with 5-7 leaflets
- Pochote (Pachira quinata): Five leaflets in palmate arrangement
- Bucaro (Erythrina poeppigiana): Trifoliate palmate (3 leaflets)