Laserfiche WebLink
•- r,?~tafinns Tarr sprcaJ <br />~•-- , ~lrr_arrrr•s, tchiiL arc <br />' :,+;di r~rounJ starts <br />~. ;~ ~~ . i', ~ :;palrlr• qj pnxluciu~ <br />to ':' 'r ' ,l:,x,t;, <br />:~ <br />~ ~ <br />E3iology and Ecology <br />Hahilat and Associated Plants <br />.\ii tL`« r Ithitrt<r}, -, Meru s :; r, n, m olxan, unshaded aroa>. Ihese t+'eeds an• <br />~;cnrnlly t+nrntl ut da«uia•d .+« :,+. dominah'<i by other caotic species, such as <br />smtkuh bn+mrgrass il3nvrm: urcrnurst.tnd Russian knapwetd tQ•rrtntuea nycnsi. <br />Kativc s}xrics as<crciatrd Keith they wrr~d. arr astrr rA<7tr rn<oidr~;L ci+mmon <br />yarrow lArhillcn rni!lifrdnuru, fringed ;agcbrush lArtrnri;in friyidar, rose (Brno spill <br />and sno,v}x•rry (Syrrl{+huriarr{N+i a!lnryl. <br />All Ihnr sFx•cies grow in a variety of wfl and range IyFxs. They myuirr mcxler- <br />:dck moist sites (12 to lh inches of pn•cipitation annu.tlh•) and arc lust adapted <br />to alkaline soil.,+•hrch an• wrl Burin}; late-spring. I luwrver, alkaline soih am not <br />a requimment (or im•asion. titles su+.t•pttMc to invasion arr mainly sub-irrigated <br />pasturt~, rangeland, ditd, banks, roadsides anil waste areas- Invasion of arid <br />rangeland by whileh+p is unlikeh'. <br />These w•rt•dv spcaes am aho well-adapted h+ cropland, rspvcially under ir- <br />rig:nion. 4\hitrtnl+ i~ ,: .e n.+u~ l,n+blem in small grau+~.:hrhhlr ,utJ t.+IL++r hrlJs. <br />alfalla 1+e.:,. ~ a+u ms..u,ptr i•cc•h .u+d several other : nq,•, <br />Seed Dispersal <br />xui. arr sl•med bt wimi, .+Iun:; tt etcnv.n-• en.i i:: i:_ uu+n .t'dcros..m t+•h:.i+a <br />.m+i mechinerc tcsi,enelh durin{;.ulhvan,mlesd is het an:l :rnh.er.i. timall <br />infestations sprrad v:a r}tinnne~ which en• undrrground stems capahlr of per <br />Boeing shtwts (Figure 5) :\ single plant can spread to an .uve 1~ Irt+t in diameter <br />in its fu•sl veer of gn+tvth, tiubsc.luent radial incmasr> range In,m 2 to i h•et per <br />year. T'hc rale of perimetrr espan,iun appears to be n•l.ned to the corn{x•titrve <br />ability of the w•getation surrounding a patch of w•hitetop. <br />