1. OBE Seminar today
12:10 Skaggs 117
Eric Aschehoug (PhD Defense)
“Indirect Interactions and Plant Community Structure”

2. Christina McBane & Hilary Bland
Blue Mountain

3. 
More Asteridae - big families!
Asteraceae
Apiaceae

4. 
Apiaceae - Carrot family
Inflorescence
umbel (often compound)

5.  Apiaceae - Carrot family Special Fruit type schizocarp
= 2 fused achenes

6.  Lomatium - Biscuitroot - herbs w/ ferny leaves
common in rocky grasslands
flowers often yellow
taproot edible (with processing)

7.  Asteraceae - Aster or Composite family Alternate name: Compositae
Distribution
worldwide, primarily temperate zone
extremely diverse: 1500 genera, >23,000 species

8.  Asteraceae - Aster or Composite family
Inflorescence = a head with involucral bracts
Each “flower” is an inflorescence

9.  Asteraceae - Aster or Composite family
Inflorescence = a head with involucral bracts

10.  Asteraceae - Aster or Composite family
2 kinds of flowers in composite heads
-- disk flowers (radially symmetric, in center)
-- ray flowers (irregular, often sterile)
Involucral
bracts
Inflorescence
receptacle

11. 
Asteraceae - Aster or Composite family

12. 
Asteraceae - Aster or Composite family
Inflorescence
receptacle

13. 
Asteraceae - Aster or Composite family
Inflorescence
receptacle

14.  Asteraceae - Aster or Composite family 3 kinds of inflorescences
ray flowers only
disk and ray flowers
disk flowers only
Not all composites are yellow -- this is just a sample!!

15.  Asteraceae - Aster or Composite family Fruit type = achene
often with pappus (calyx)
modified for wind dispersal

16.  Asteraceae - Aster or Composite family In Montana
largest family: 80 genera, 374 species
mostly herbs, some shrubs (ex. Artemisia or Sagebrush)
several Noxious Weeds (ex. Centaurea or Knapweed)

17.  Asteraceae - Aster or Composite family Leaves alternate or opposite
entire, toothed or pinnately lobed
sometimes prickly (thistles)
often a basal rosette in perennial herbs

18.  Aster - Aster - >25 species in Montana
- annual or perennial herbs
- leaves simple, often linear
- disk and ray flowers

19.  Centaurea - Knapweed/Star-thistle - ~5 non-native weeds
- perennial herbs w/ taproot
leaves simple, lobed, compound
plants spiny

20.  Artemesia - Sagebrush 20 species dryland shrubs
leaves simple or lobed; hairy
plants aromatic
disk flowers only (not showy)

21. Lamiaceae
Boraginaceae
Scrophulariaceae

22. Solanaceae
Phlox
Dodecatheon
Campanula

23. 
More Asteridae - big families!
Asteraceae
Apiaceae

24. Exam 2 grade distribution
Mean = 80
Median = 81