Trying to learn to distinguish the bell flowers found in Illinois.

Useful Terms:
Acintomorphic – radial symmetry (daisy)
Zygomorphic – only one way to make symmetrical (orchid)
corolla – the collective petals of a flower
sessile – without stem/stalk

Split Corolla – Lobelia
Leaves sessile, often clasping. Solitary sessile flower – Triodanis
Else - Campanula

Triodanis
bracts circular or ovate T. perfoliata
bracts linear or lanceolate T. leptocarpa (rare)

Lobelias
Red – Lobelia cardinalis
Rose – might be a hybrid of cardinalis and siphilitica
Blue (sometimes white)-

• not very hairy, larger flowers, lancelate or oblong ovate leaves L. siphilitica
• southern Illinois, really hairy stems etc, smaller flowers L. puberula

• Chicago area, bottom petals hairy, small flowers, pale blue, not very dense racemes, thin upper leaves,
  spatula bottom leaves L. kalmii
  L. inflata, small pale blue flowers with inflated seed capsules
  L. spicata, tiny pale blue or white flowers

Campanula
narrow leaves

• not very hairy: rotundifolia
• white corolla: aparinoides

• blue corolla: ulginosa
  ovate leaves

• splayed out flower: americana
• flowers with short pedicle, drooping, 1 sided raceme: rapunculoides
• sessile errect flowers: glomerata

Staghorn: is fuzzy, serrated long leaflets
Smooth: no hair, serrated long leaflets
Northern: a hybrid that has some hairs but not abundant
winged or shining– wings in between branches, fruit droops
fragrant: 3 broader leaflets with middle biggest

look alikes: walnuts are fine serration, tree of heaven just a few leaf scent glands at base