What’s a dichotomous key?
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  - Group 1Lycophytes, Monilophytes
- Group 2Gymnosperms
- Group 3Monocots
- Group 4Woody angiosperms with opposite or whorled leaves
- Group 5Woody angiosperms with alternate leaves
- Group 6Herbaceous angiosperms with inferior ovaries
- Group 7Herbaceous angiosperms with superior ovaries and zygomorphic flowers
- Group 8Herbaceous angiosperms with superior ovaries, actinomorphic flowers, and 2 or more distinct carpels
- Group 9Herbaceous angiosperms with superior ovaries, actinomorphic flowers, connate petals, and a solitary carpel or 2 or more connate carpels
- Group 10Herbaceous angiosperms with superior ovaries, actinomorphic flowers, distinct petals or the petals lacking, and 2 or more connate carpels
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- Dichotomous Key
- Resedaceae
Resedaceae
This family contains exactly one genus, Reseda.
See list of 4 species in this genus- 
      
    
  
    
      
      1a. Leaf blades entire (rarely with a few, minute, hyaline teeth near the base)- 
      
    
  
    
      
      2a. Pedicels 1–3 mm long; corolla with 4 petals, each petal either entire or with 4 short lobes; capsules 3–4 mm long
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      2b. Pedicels 4–6 mm long (elongating to 16 mm in fruit); corolla with 6 petals, each petal divided at the apex into 9–15 linear-spatulate segments; capsules 9–11 mm long (in part)
 
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      1b. Leaf blades lobed or dissected- 
      
    
  
    
      
      3a. Petals green-white; filaments persistent until maturation of fruit; gynoecium with 4 carpels; capsules with 4 apical teeth
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      3b. Petals green to green-yellow or yellow; filaments deciduous before maturation of fruit; gynoecium with 3 carpels; capsules with 3 apical teeth- 
      
    
  
    
      
      4a. Petals apically entire or with 2 or 3 linear-spathulate segments [Fig. 822]; capsules 4.5–5.5 mm wide; seeds lustrous, smooth; most leaf blades pinnatifid with 1 or 2 (–4) pairs of lobes
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      4b. Petals divided at the apex into 9–15 linear-spathulate segments; capsules 7–11 mm wide; seeds dull, undulate-rugose; leaf blades entire or sometimes the upper ones with 2 or 3 lobes (in part)
 
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   Show photos of:  
  
    Each photo represents one species in this genus.
   Show photos of:  
  
    Each photo represents one species in this genus.