San Francisco : Architect and Engineer, Inc · leaf 310
cture vine is the common namegiven to a serious weed pest which bot-anists call Tribulus terrestris. It hasearned this common name because of thesharp pointed spins, of which there aretwo on each bur. This bur is so balancedthat one of the two spines always pointsupward when the bur is lying on… … »i! ^■•Ji1 ■r.v* ^ \ i» .Mi,
Architecture · Building
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