tall shrubs http://www.google.pl/search?hl=pl&q="tall shrubs"&lr= (100 tys. trafień)
low shrubs http://www.google.pl/search?hl=pl&q="low shrubs"&lr= (150 tys. trafień)

greens dla mnie to była zawsze zielenina do jedzenia, ale co ja tam wiem
any of various leafy plants or their leaves and stems eaten as vegetables
wordnet.princeton.edu/perl/webwn

Leaf vegetables, also called greens or leafy greens, are plant leaves eaten as a vegetable, sometimes accompanied by tender petioles and shoots. Although they come from a very wide variety of plants, most share a great deal with other leaf vegetables in nutrition and cooking methods. Almost all types of leaf vegetables come from annual plants or biennial plants.
en.wikipedia.org/wiki/Greens_(vegetable)

ale fachowiec pewnie inaczej na to powie
Such buffer shall be planted with native and naturalized shade trees and low shrubs of sufficient density to effectively screen the industrial use from view ...
www.wareham.ma.us/Public_Documents/WarehamMA_TownMeeting/S0...


z drugiej strony można pewnie też pójść w 'bushes & trees' zgodnie z zasadą - call a spade a spade