Cypress-Pines (Callitris spp.)

Cypress-pines are small- to medium-sized trees, although a few species reach heights in excess of 100 feet. Although they resemble junipers (Juniperus spp.) in general appearance and by virtue of possessing two different types of leaves, cypress-pines bear both needle-like and scaly leaves throughout their lives. Name and Classification The genus name of cypress-pines comes […]

rain barrel

Low Impact Development at the Landowner Level

Urban runoff is the largest cause of ocean pollution in southern California. Our many roads and sidewalks whisk the polluted water from our highways and byways right into the ocean, via a network of storm water drains. These pollutants include not only the oils, phosphates and plastics littering local streets, but also the pesticides, herbicides […]

rain garden

Low Impact Development for Los Angeles: The Dollars Make Sense

One of the most exciting things about low impact development projects is that they usually save developers and communities money. In fact, according to a 2007 study by the Environmental Protection Agency, which examined the costs of construction projects that incorporated LID design principles across the country, LID projects are typically less expensive than construction […]


Low Impact Development: Best Management Practices

Storm water runoff is a significant environmental problem for the Los Angeles area, as it contributes to ocean pollution and exacerbates drought conditions. Low impact development (LID) is a development strategy that seeks to manage storm water runoff more effectively by dealing with runoff water on site, rather than trying to channel the water away […]


Low Impact Development: Ecological Solutions to Concrete Problems

Despite recent efforts to reduce carbon emissions and protect green spaces, the natural world continues to struggle as it attempts to cope with human development. The climate is changing, oceans are becoming increasingly acidic, habitats – and the species native to them — are disappearing and, perhaps most importantly for Californians, our fresh water reserves […]

curitiba street

Trees: A Neglected, but Essential Component of Municipal Infrastructure

Nearly 6,000 years ago, in what is now Iraq, the Mesopotamians took an important step that would forever change the world: They turned the region’s well-worn footpaths, born of countless generations’ foot traffic, into the first stone-paved roads. In doing so, they enabled goods and services to flow easily through the region, and the civilization […]

elm avenue

Street Trees: Separating the Superlative from the Second-Rate

While few disagree with the need to increase the number of trees lining the nation’s cities and streets, it is important that such advances proceed deliberately, in accordance with well-conceived plans. While it is true that most trees provide tangible, quantifiable benefits, they also require resources to maintain. Selecting the wrong trees for a given […]

mushrooms on tree

Know When to Get Help: 6 Concerning Signs of Tree Problems

Tree professionals commonly encourage property owners to consult a certified arborist whenever confronted with a tree-related problem; but, while sound, this advice is incomplete. Lacking the training of an arborist, property owners often fail to notice problems that are glaringly obvious to experienced eyes. It is impossible to list all of the possible symptoms that […]

bitch bark

The Bark Barrier

While a few traits characterize the bark of all trees, these protective coverings are remarkably diverse. As with other tree components, such as leaves, branches and roots, every bark is adapted to suit its environment and the life history of the species. Although bark hardly seems as exciting or fascinating as so many other aspects […]

California’s Fall Color

Contrary to popular perception, California does change colors during autumn. While evergreen conifers may dominate portions of the state, the green leaves of many broadleaf species slowly transition from green to yellow, orange or red from September through December. In fact, because of the state’s unique combination of climate and geography, California offers some of […]