Class-By-Class Information
Class Overview
—Introduction to Watershed Protection

Introduction to
Water Quality Monitoring

Conducting a Watershed Assessment

Restoring Anadromous Fisheries

Introduction to Land Protection

Developing and Managing Trails
on Protected Lands

Managing Protected Lands
Vernal Pools and Invasive Species

Field Assessment of the Wolf Hill Property
A "Who’s Who" of Watershed Management
Federal Agencies
Environmental Protection Agency»

Natural Resources Conservation Service»

National Oceanic and Atmospheric Administration»

US Army Corps of Engineers»
State Agencies
Department of Environmental Management»

Coastal Resources Management Council»

Narragansett Bay Commission»

Rhode Island Water Resources Board»
Rhode Island Economic Development Corporation»

Rhode Island Rivers Council»

Rhode Island Department of Transportation»

Rhode Island Department of Health»

University of Rhode Island»
Non-Government Agencies
Audubon Society of RI»

The Nature Conservancy»

Clean Water Action»

Rhode Island Public Interest Research Group»

Conservation Law Foundation»

Save The Bay»

Watershed Councils»
Site Map(Coming Soon!)
Some of the files on this site are in ADOBE PDF format and will require the FREE Acrobat Reader.
Click the icon below to get yours.
Invasive Plant Species on the Wolf Hill Property
Autumn Olive (Elaeagnus Umbellata)
Oleaster family (Elaeagnaceae)


Key Characteristics
  • Deciduous shrub growing to 20’ H.
  • Alternate leaves are green above, silvery below, creating a shimmering effect on windy days.
  • Branching pattern often gives specimen a “tilted” appearance.
  • Fragrant, tubular flowers in spring followed by a red juicy berry appearing sprinkled with silver glitter.

  • Deciduous shrub or small tree that can grow to 20’ in height

  • alternate, lance-shaped, entire
  • dark green above and silver-white scaled below, creating a two toned effect and causing the shrub to “shimmer” on windy days

  • Grayish-tan
  • New growth often dotted with light yellow resin dots
  • Remnant spur branches look like thorns

  • May-June
  • small, tubular, extremely fragrant, light yellow flowers are borne along twigs after the leaves appear, early in the growing season

  • Small, round, juicy fruits are reddish to pink, dotted with silvery scales and produced in great quantity

  • Autumn olive has nitrogen-fixing root nodules, which allow it to thrive in poor soils.
  • Typical habitats are
    • disturbed areas
    • roadsides
    • pastures
    • fields in a wide range of soils
    • It also may invade grasslands, wildlife clearings, timber clearings, and sparse woodlands but does not thrive in densely forested situations.

Similar Species
  • Autumn olive is easily confused with Russian olive (Elaeagnus angustifolia), which does not appear to be invasive in much of the northeast. Russian olive has elliptic to lance-shaped leaves that are silvery on both sides; its branches are usually thorny, and its fruit is yellow, dry and mealy.
  • It can also be confused with many of the native willows whose leaves are dark green on the upper leaf surface and whitish beneath. However, most of the shrub or tree-like willows (Salix spp.) have toothed leaves or at least some fringing along the leaf margins.
  • Additionally the reproductive structure of willows is a catkin, quite unlike the tubular flower and red juicy fruit of Autumn olive.