Tree Biology

The Basic Anatomy of a Tree

The Basic Anatomy of a Tree
We know what a tree is – but there is no precise definition which is completely recognized of what a tree is in ordinary language or in botany. 

In the broadest viewpoint, a tree is any plant formed with an...

Is it Time for a House Call? (Part 1)

Is it Time for a House Call?

Spring is a great time to consider San Francisco tree and shrub pruning service before the warm weather rush begins. 

Protecting your Trees from Common Spring Diseases

Tree diseases and pests can make an...

A Sucker is Born . . . .

A Sucker is Born...

Epicormic sprouts, also known as "suckers" or "water sprouts," are a growth that appears from dormant buds on an existing tree branch or trunk. 

A tree of nearly any size can break out heavily in epicormic sprouts....

Armillaria Root Rot – Its Bark Glows in the Dark!

With so much media attention focused on our environment, most people are somewhat familiar with pests and diseases that can have a devastating effect on specific trees such as the Emerald Ash Borer and sooty canker. 

However, there is a...

Mistletoe - A Parasite with Panache

First . . . the data. Mistletoe is the common name for a parasitic plant with yellowish flowers and glutinous white berries that grow attached to, and within, the vascular system of a tree or shrub. Mistletoe does not normally kill a tree,...

The Arborist Now Expert Tree Quiz

Recently, we posted a quiz designed to test the tree knowledge of the general public, but, today, we wanted to share a similar quiz. However, we made this quiz for tree-care professionals (who should have aced Monday’s quiz). Scroll down to...

The Arborist Now Tree Quiz

Are you interested in testing your tree-teligence? Take our tree-knowledge quiz below and see how you do! 

Each question is multiple choice; scroll down for the answers. We designed this quiz for laypersons, but we have published a quiz...

Thorns and Prickles and Spines, Oh My!

While not terribly common, many trees bear sharp thorns along their twigs, branches or trunks. Often, thorns are seen as problematic traits, and trees that bear them are often avoided during installations. Some have even produced thornless...