1. HOYA PURPUREOFUSCA
Family Asclepiadaceae

2. Galiann Meier Plant Anatomy 423 Integrative Biology May 2, 2005

3. Hoya culture
Commonly grown as a houseplant, as is not hardy below 50 degrees
Over 100 species
Fast growing dicot vine
Native to Indonesia
Common name is “Wax Plant” because the leaves and other plant parts are covered in a waxy substance.

4. Stem Anatomy
Pith
Young Stem
Waxy layer
1° Phloem
1° Xylem

5. Mature Stem
Pith with
Macrosclerids
Xylem
Phloem

6. Stem Anatomy
2° Xylem
Vessel Members
Cork Cambium

7. Leaf/Stem Anatomy
Stem with leaf trace
Petiole
xylem
leaf trace

8. Leaf Primordia
New Leaves
Trichomes

9. Leaf Anatomy
Xylem
Bicollateral Phloem
Vascular Bundle

10. Leaf Anatomy
Anisocytic arrangement
Abaxial surface of leaf

11. Root Anatomy
Root Hairs
Young root at root apex

12. Root Anatomy
Xylem
Root at region of
early differentiation

13. Root Anatomy
Root Hairs
with Soil
Phloem
Meta Xylem

14. Root Anatomy
Epidermis
Xylem
Cortex

15. Root Anatomy
Root with
Branch Root
Pericycle
Epidermis
Xylem

16. Root Anatomy
Root Apical
Meristem
Root Cap

17. Root Anatomy
Root Longitudinal Section
Vascular cylinder
Sieve tubes

18. Sun Burn
Tannins
Palisade
Mesophyll

19. Sources
Anatomy of Seed Plants. Esau, Katherine John Wiley & Sons