The Collaborative International Dictionary of English v.0.48:

Scrubby \Scrub"by\ (skr[u^]b"b[y^]), a. [Compar. Scrubbier
   (skr[u^]b"b[i^]*[~e]r); superl. Scrubbiest.]
   Of the nature of scrub; small and mean; stunted in growth;
   as, a scrubby cur. "Dense, scrubby woods." --Duke of Argyll.
   [1913 Webster]

WordNet (r) 3.0 (2006):

scrubby
    adj 1: sparsely covered with stunted trees or vegetation and
           underbrush; "open scrubby woods" [syn: scrabbly,
           scrubby]
    2: inferior in size or quality; "scrawny cattle"; "scrubby cut-
       over pine"; "old stunted thorn trees" [syn: scrawny,
       scrubby, stunted]

Moby Thesaurus II by Grady Ward, 1.0:

148 Moby Thesaurus words for "scrubby":
   Lilliputian, Tom Thumb, abject, abominable, afforestational,
   arborary, arboreal, arboreous, arborescent, arboresque, arborical,
   arboriform, arrant, atrocious, base, base-minded, bedraggled,
   beggarly, beneath contempt, bosky, braky, broken-down, bushlike,
   bushy, cheap, cheesy, citrous, common, coniferous, contemptible,
   copsy, crummy, debased, deciduous, degraded, dendriform, dendritic,
   dendroid, dendrologic, depraved, despicable, dingy, dirty,
   disgusting, down-at-heel, dumpy, dwarf, dwarfed, dwarfish, elfin,
   evergreen, execrable, faded, flagrant, forest, forestal, forested,
   foul, fulsome, gaudy, gimcracky, grave, gross, hardwood, heinous,
   ignoble, incipient, little, low, low-down, low-minded, lumpen,
   mangy, meager, mean, measly, meretricious, midget, miserable,
   monstrous, nanoid, nefarious, nondeciduous, obnoxious, odious,
   paltry, pathetic, petty, piny, pitiable, pitiful, poky, poor,
   pygmy, rank, reforestational, reptilian, rubbishy, rudimental,
   rudimentary, run-down, runty, sad, scabby, scraggy, scrubbly,
   scrublike, scruffy, scummy, scurvy, scuzzy, seedy, shabby, shoddy,
   shriveled, shrubby, shrublike, shrunk, shrunken, silvicultural,
   small, softwood, sorry, squalid, squat, stunted, sylvan, tacky,
   timbered, trashy, treelike, trumpery, two-for-a-cent,
   two-for-a-penny, twopenny, twopenny-halfpenny, undersize,
   undersized, unmentionable, valueless, vile, wizened, wooded,
   woodland, woodsy, woody, worthless, wretched