1. Castor bean Family: Euphorbiaceae Genus: Ricinus Species: communis
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

2. Seedling: tap root system
secondary leaf
primary leaf
cotyledon
secondary root
primary root
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

3. มีไขปกคลุม (wax) Stem dichotomous branching internode node main stem
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

4. มีการแตกกิ่ง (branching)
stem
มีการแตกกิ่ง (branching)

5. Leaf: simple leaf leaf blade petiole midrib oil gland
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

6. แต่เรียกทั่วไปว่า raceme
Inflorescence: panicle
pistillate flower
staminate flower
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

7. Staminate flower ไม่มี petal
branched stamen
Staminate flower ไม่มี petal
anther
branched
filament
young staminate flower
sepal
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

8. Staminate flower branched filament anther
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

9. Pistillate flower ไม่มี petal
Pistillate flower ไม่มี petal ** ระวังให้ดี อย่าเข้าใจผิดว่า stigma เป็น petal
ovary
carpel
young pistillate flower
pistillate flower
stigma
sepal
pedicel
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

10. Fruit: capsule pericarp spine pedicel seam rachis carpel peduncle
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

11. Fruit pericarp pericarp seed seed cross section long section pericarp
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

12. Seed caruncle raphe mottle (mottling)
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University

13. Seed long section pericarp caruncle embryo cotyledon endosperm
seed coat
(testa)
long section
pericarp
© Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University