Examples from the Web for olivaceous
The olivaceous cap with its peculiar involute margin and its radiating stem will greatly assist in its determination.
The spores and the capillitium are at first olivaceous, then brownish-purple, the spores rough and minutely warted.
Their ground sometimes presents a greenish-white color, but tends more to olivaceous or dull drab.Nests and Eggs of Birds of The United States|Thomas G. Gentry
The mass of the spores is olivaceous, changing to pale-brown.
Myiarchus tuberculifer platyrhynchus Ridgway: Olivaceous Flycatcher.Summer Birds From the Yucatan Peninsula|Erwin E. Klaas