The landscaping shall be in accordance with subsection 25-5.10 of the Township's Land Development Ordinance and shall include shade trees, decorative flowering trees, evergreen trees, shrubs and hedges, ground cover, perennials and annuals, and may include other materials such as rocks, sculpture, art, walls, fences and decorative brick or paving materials provided, however, that street trees do not have to be planted in a linear configuration, and can be clustered in groupings so long as the total number of street trees is the same as if they had been planted in a linear configuration at forty (40) feet on center. Additionally, street trees shall have a caliper of two and one-half (2 1/2) inches.