Various Forms of Simple Leaves
1. Oval or elliptical. 2. Ovate. 3. Obovate. 4. Orbicular. 5. Lanceolate. 6. Linear. 7. Cordate (heart-shaped). 8. Obcordate. 9. Reniform (kidney-shaped). 10. Sagittate (Arrow-shaped). 11. Rhomboidal. 12. Spathulate (spoon-shaped). 13. Peltate (stalk fixed to the centre). 14. Oblique. 15. Runcinate (lobes pointing more or less downwards). 16. Hastate (halberd-shaped). 17. Angled. 18. Palmate. 19. Pinnatifid.
Forms of Compound Leaves
1. Binate. 2. Ternate. 3. Digitate. 4. Pinnate.
Forms of Inflorescence
1. Spike. 2. Raceme. 3. Corymb. 4. Umbel. 5. Cyme. 6. Compound Raceme or Panicle. 7. Capitulum or Head. 8. Compound Umbel.
It is often convenient to make use of certain terms to denote the various arrangements of flower-clusters, and the principal of these are as follows:—
1. Spike.—Sessile flowers arranged along a common axis.