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OBE Seminar today 12:10 Skaggs 117 Eric Aschehoug (PhD Defense)

OBE Seminar today 12:10 Skaggs 117 Eric Aschehoug (PhD Defense) “Indirect Interactions and Plant Community Structure”. Christina McBane & Hilary Bland Blue Mountain. . More Asteridae - big families!. Asteraceae. Apiaceae. . Apiaceae - Carrot family. Inflorescence

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OBE Seminar today 12:10 Skaggs 117 Eric Aschehoug (PhD Defense)

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  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 disk and ray flowers disk flowers only ray 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

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