Multiple choice Rubber is obtained by crushing the stem of Euphorbia crushing the stem of Hevea crushing the leaf of Euphorbia crushing the leaf of Hevea Reveal answer Fill a bubble to check yourself B Correct answer Explanation Natural rubber is commercially obtained from the latex of Hevea brasiliensis (rubber tree). The latex is collected by tapping (making incisions in) the stem, not by crushing. Euphorbia also produces latex but is not the commercial source of rubber.