1) Drought-tolerant plant 2) Genus umbellularia 3) Magnoliid dicot genus 
Umbellularia californica is a large hardwood tree native to coastal forests of California and slightly extended into the state of Oregon. It is endemic to the California Floristic Province. It is the sole species in the genus Umbellularia. The tree was formerly known as Oreodaphne californica. In Oregon, this tree is known as Oregon Myrtle, while ...
• (n.) A genus of deep-sea alcyonaria consisting of a cluster of large flowerlike polyps situated at the summit of a long, slender stem which stands upright in the mud, supported by a bulbous base.
[n] - aromatic evergreen trees of Pacific coast
genus Umbellularia noun aromatic evergreen trees of Pacific coast