Any of various white- or cream-flowered shrubs of the genus Philadelphus (family Hydrangeaceae); especially P. coronarius, native to southern Europe and south-west Asia and cultivated in numerous ornamental varieties and hybrids; also called mock orange.

Any of several South American trees of the genus Hevea (family Euphorbiaceae) which yield latex from which natural rubber is made; especially the para rubber tree, H. brasiliensis, of the Amazon basin. Also: this rubber itself. Frequently attributive, especially in "seringa rubber", "seringa tree".