ORDER ASTERALES Family compositae (Asteraceae) It is the largest family among angiosperms, containing about 1,620 genera and 23,600 species Distributation The member belonging to this family are found in everywhere on the surface of the earth (Cosmopolitan) in each possible type of habitat .Most of them are herbaceous but form tropical regions ,In Pakistan it is represented by many genera few are given as follows. Scientific Name: Helianthus annus Local Name: Surij Muki Family: AsteraceaeScientific Name: Helianthus tuberosus Local Name: Hatichuk Family: AsteraceaeScientific Name: Carthanus tinctorius Local Name: Kusum Family: AsteraceaeScientific Name: Carthamus oxycanthus Local Name: Kantiari Family: AsteraceaeScientific Name: Aertmisia absinthium Local Name: Vilaiti afsantin Family: Asteraceae etc .

1. AFRASIYAB AHMED
BOT-15-06
5TH
BS BOTANY (4 YEARS )
Presentation Topic : The Family Asteraceae
GOVT POST GRADUATE COLLEGE # 1 ABBOTTABAD

2. ASTERACEAE (COMPOSITAE)
The name is due to aster shape flowers
In greek “aster”means “ star shape”
It contains about 950 genera & 22,000
species
In Pakistan family is represented as 139
genera & 776 species

3. ASTERACEAE (COMPOSITAE)
 Distributions: is cosmopolitan / world wide
 Largest family among the angiosperms
 About 10% of the total flower among angiosperms

4. CLASSIFICATIONS
 Division Phanerogams
 Sub-division Angiosperms
 Class Dicotyledons
 Sub-class Gamopetalae
 Series inferae
 Order Asterales
 Family Asteraceae

5. VEGETATIVE CHARACTERS
Habit:
It may be annual or perennial herbs
Some are shrubs rarely trees.

6. ROOT
 Tap Root , branched

7. ROOT
In Dahlia the root store foods (tuberous)

8. STEM
 Herbaceous , erect , branched , hairy .
 In some cases it is woody rarely climbing

9. LEAVES
 Petiolate ,simple rarly compound
 Phyllotoxy may be alternate or opposite
 Hairy
 Recticulate venations have be recorded .

10. FLORAL CHARACTERS
 Inflorescence:
1. Racemose
2. Head
3. Capitulum

11. CAPITULUM INFLORESCENCE

12. TYPES OF HEAD INFLORESCENCE
 Homogamous
when all florets are same in structure and functions
e.g vernonia
 Heterogamous
When florets are of two types
1. Ray florets
2. Disc florets

13. HOMOGAMOUS
Vernonia gigantea

14. RAY FLORETS & DISC FLORETS
 Disc floret
• ray floret

15. RAY FLORET
sessile , Bracteate , incomplete unisexual
Zygomorphic epigynous
 Calyx:
Modified into hair like structure (pappus)
 Corolla:
5 petals , Gamopetalous, valvate aestivations
 Androcium:
absent
 Gynoceium
bicarplellary , syncarpous , ovary inferior
Placentations
 Basal

16. RAY FLORET

17. DISC FLORET
sessile , Bracteate , complete bisexual
actinomorphic epigynous
 Calyx:
Modified into hair like structure (pappus)
 Corolla:
5 petals , Gamopetalous, valvate aestivations
 Androcium:
stamens 5 syngenesious , basifixed
 Gynoceium
bicarplellary , syncarpous , ovary inferior

18. DISC FLORET

19. FRUIT & SEED
 Fruit:
An achene (*one seeded achene is called cypsela*)
 Seed:
Non-Endospermic

20. FLORAL FORMULA & FLORAL DIAGRAM

21. ECONOMIC IMPORTANCE
 Edible
 Many plants are used as a source of food
 i.e root and leaves of Cichorium (chicory)

22. ECONOMIC IMPORTANCE
Edible
 leaves of synara and lactuca as food

23. ECONOMIC IMPORTANCE
 Edible
 Roots of Helianthus tuberosus

24. ECONOMIC IMPORTANCE
 Medicinally important
 Santonin drug is obtain form Artemisia
 It is used against round worm

25. AS AN ORANMENTAL
CHRYSANTHEMUM

26. ORANMENTAL
 Cosmos Sulpharuence

27.  Gazania rigens Tagetes erecta

28. Silybum marianum

29.  Parthenum hyestophorus Gajar Ghans.

30.  Helianthus annus
 Suraj Mukkahi