Form.—Gamopetalous and Polypetalous.
| Gamopetalous. | - | Regular. | |
Urceoiate,  urn-shaped(Whortleberry). | |||
Tubular  cylindrical(Trumpet Honeysuckle) | |||
Campánulate,  bell-shaped (Harebell). | |||
Infundíbular,  funnel-shaped (Morning-glory). | |||
Hypocraterimórphous,  salver-shaped (Phlox). | |||
Rotate,  wheel-shaped(Potato). | |||
| Irregular. | |||
Ligulate,  strap-shaped (Dandelion). | |||
| Lābiate, two-lipped. | |||
Gāleate,  upper liparched (Catmint). | |||
Ringent,  both lipsarched (Dead-nettle). | |||
Personate,  throatclosed (Toad-flax). | |||
| Polypetalous. | - | Regular. | |
Rosāceous,  petals without claws (Rose). | |||
Liliāceous,  petalswith claws gradually spreading (Lily). | |||
| Caryophyllāceous, long claws enclosed in a tube (Pink). | |||
Crucíferous,  fourclawed petals in the form of a cross (Mustard). | |||
| Irregular. | |||
Papilionāceous,  butterfly-shaped (Bean). | |||
| Parts.—Vexillum, banner; alæ, wings; carīna,keel. | |||
Æstivation, the arrangement of the floral organs in the bud.
Valvular,
pieces met by their margins (Lilac).
Induplicate,
margins turned inward (sepals of Clematis).
Reduplicate,