A:Cascade: A waterfall-like cascade of blooms and greenery that's anchored in a hand-held base. Looks like a miniature floral train.
Pomander: A bloom-covered ball suspended from a ribbon. Perfect for flower girl. Now popular for brides.
www.theknot.com
about keeping floral costs down--professional is necessary so compare different prices. Be sure not to skimp in this area because people will notice.