Disjunct Foliar Veins in Hawaiian Euphorbias

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Science  26 Mar 1971:
Vol. 171, Issue 3977, pp. 1247-1248
DOI: 10.1126/science.171.3977.1247


Isolated segments of veins occur in the leaf mesophyll of several Hawaiian species of Euphorbia. These anomalous structures appear to consist entirely of tracheids and are a normal feature of the anatomy of species native to mesic and wet areas, but not to xeric, dry habitats.