Know Before You Go

© 

Plants of the Galapagos Islands

Galapagos plants are as spectacular as the wildlife. No where else on earth will you find cactus intermingling with cotton against a backdrop of daisy trees. Rare, common, native or introduced, Galapagos Islands flora come in many varieties.

In recent years, introduced Galapagos plants have taken center stage, threatening native species and upsetting the natural balance of life on the islands. Conservation programs supported by responsible tourism are helping to reduce the impact of introduced Galapagos plants on the islands’ fragile ecosystems and protect native plants and wildlife.

Native Plants of the Galapagos

Many of the plant species found in the Galapagos Islands are as interesting and unique as the islands’ renowned animal life. Still, many first-time visitors are surprised by the arid, almost lunar landscape that greets them as they step off of the plane. When compared to many parts of mainland South America or to other tropical island groups throughout the world, the Galapagos Islands are home to relatively few native plant species and are not particularly lush, except at higher elevations on the larger islands.

Scientists believe that there are around 600 native species of vascular plants here – not many when you consider that mainland Ecuador alone is home to over 20,000!

This discrepancy makes sense when you consider the obstacles that the ancestors of today’s Galapagos plants faced in getting there. First, seeds had to somehow make it across 600 miles of salty ocean from the mainland, carried by birds, the wind, or on rafts of wood and vegetation. And because the islands lie within the Pacific dry belt, they receive little rainfall at lower elevations in normal years, resulting in semi-desert conditions throughout much of the archipelago. Once on land, the newly-arrived seeds had to establish themselves and adapt to this foreign and often harsh environment. Finally, because the islands are relatively young in geologic terms, the plants that did make it have had relatively little time to branch out, evolutionarily speaking, into new varieties and species.

In spite of all of this, the flora of the Galapagos is endlessly complex and fascinating. Thirty percent of the native vascular plants here are found nowhere else on Earth and there are seven entirely distinct endemic genera. The endemic genus Scalesia, for example, is comprised of fifteen different species of trees found nowhere else on earth. They have been called "the Darwin's finches of the plant world" because of their remarkable pattern of adaptive radiation.

Because of the variation in plant life found at different elevations and from island to island, the flora of the Galapagos is generally categorized into seven distinct vegetation zones:

Littoral (or Coastal) Zone

This zone extends from the edge of the ocean to around fifty to one hundred miles inland and is populated by plants that are well adapted to living in salty conditions. Four species of mangrove can be found along the edges of the numerous saltwater lagoons in this area. In addition to limiting erosion caused by waves and storms, mangroves provide habitat and nesting places for many bird species, including finches, herons and mockingbirds. The shallow waters of mangrove swamps also provide safe nurseries for young fish, mollusks, shrimps and other species that are crucial links in the Galapagos food chain.

Arid Zone

The arid zone is the next vegetation zone you’ll encounter as you move inland from the littoral zone. It is the largest vegetation zone in the archipelago, extending to 300 feet on the wetter, southern sides of the islands, and as high as 1,600 feet on the drier, northern sides. Some of the smaller and lower islands are located entirely within this zone. Three types of endemic cacti dominate the landscape here; lava, candelabra, and prickly pear, the staple diet of land iguanas and giant tortoises.

Transition Zone

As you move up from the arid zone, you will encounter the transition zone. As its name implies, this zone lies between the arid lowlands and the cooler, moister highlands and is home to species from both. As such, this zone has the greatest plant diversity among the seven vegetation zones. Small trees and shrubs, including the endemic pega pega and the native hardwood matazarno, dominate this landscape.

Scalesia Zone

This zone is often referred to as the “rain forest of the Galapagos.” Sitting at elevations ranging from about 650 to 1,300 feet on the larger islands, the Scalesia zone is notably cooler, moister and more lush than the zones below it. It is named for the Scalesia forests found here. Some of the trees can grow to over sixty feet tall and are covered in ferns, mosses and orchids. Unfortunately, introduced pigs, goats and plants have decimated these once great forests.

Zanthoxylum (or Brown) Zone

The Zanthoxylum zone is named after the predominant plant found here: the Zanthoxylum fagara, or “cat’s claw.” It is also sometimes referred to as the “brown zone” because the brown lichens that cling to the trees give them a brownish hue. This zone has largely been destroyed by agriculture, unfortunately.

Miconia Zone

The Miconia zone can be found at elevations starting around 3,200 feet on the islands of Santa Cruz and San Cristóbal. It is named for the Miconia shrub, which once carpeted the region, but is now one of the most endangered plants in the archipelago due cattle grazing and the impact of invasive plants. The Miconia robinsoniana can grow to sixteen feet and has purple and pink flowers.

Pampa or Fern-Sedge Zone

Here in the highest elevations of the Galapagos (above 3,200 feet) exists an otherworldly realm of ferns, grasses, mosses, lichens and orchids. The plants in this zone crowd around temporary pools of water and disappear and reappear seasonally based on rainfall. The only tree found here is the endemic Galapagos fern tree, which can grow to nine feet tall and has a trunk that can grow to eleven inches in diameter.

Invasive Plants of the Galapagos

One of the biggest problems in the Galapagos comes from foreign plant species introduced to the islands, which invade the native vegetation. Most of these species were brought on purpose either for agriculture or gardens, and the problem is therefore greatest on the inhabited islands. There were 475 known introduced species by early 1999, and the process is still continuing at the rate of about ten new arrivals each year. At the current rate, it is estimated that introduced plant species will soon outnumber native species, if they haven’t done so already. About forty of these are already seriously hindering native vegetation growth, and another seventy introduced plants are likely to cause problems in the future.

Each island has its own issues regarding introduced plant species. On Santa Cruz, for example, the worst culprits are guava (Psidium guayaba), the curse of India (Lantana camara), a species of blackberry (Rubus niveus) and quinine (Cinchona pubesceris). Quinine trees have invaded a unique vegetation zone formed by the endemic plant (Miconia robinsoniana), which is found on only two islands. Quinine shades out Miconia and eventually all the other plants around it, so if not controlled, could completely wipe out this entire vegetation zone. Because it is drought-resistant, the guava tree can thrive just about anywhere, replacing native trees and shading out all the smaller plants. The endemic scalesia tree dies out in huge numbers during severe El Niño events and there are fears that it will never recover from the 1997–98 event, as the introduced guava will prevent its natural regrowth. Other problem plants are passionflower, elephant grass, and kalanchoe, the ornamental mother-of-thousands.

Introduced animals also have a detrimental effect on the native flora. Goats have decimated the vegetation on many islands and brought some plant species to the verge of extinction. Feral donkeys and cattle also graze on native plants or trample them, and insects and other invertebrates are a major problem as well. For example, in 1982 a scale insect, the cottony cushion scale, was first reported in Galapagos and spread to another seven islands by 1997. It infests and often kills many kinds of native plants, and scientists looked at biological methods of control to safeguard the vegetation. In January 2002 the Australian ladybug, the natural enemy of the cottony cushion scale, was released following extensive studies to ensure that the ladybug did not pose any threat to the Galapagos ecosystem.

Repeater Layout : vertical
Know Before You Go

Send Me Travel Emails

Get the Inside Scoop on the

World of Nature Travel

Our weekly eNewsletters highlights new adventures, exclusive offers, webinars, nature news, travel ideas, photography tips and more. Sign up today!

Natural Habitat Adventures Logo WWF Logo
Send Me Travel Emails
Privacy Policy
Thank you for joining our email list

Look for a special welcome message in your inbox, arriving shortly! Be sure to add naturalhabitat@nathab.com to your email contacts so you don’t miss out on future emails.

Get Weekly Updates

Our weekly eNewsletter highlights new adventures, exclusive offers, webinars, nature news, travel ideas, photography tips and more.

Privacy Policy
We're Proud of the Reputation We’ve Earned
Outside
Voted "World's Best Travel
Company"
by Outside Magazine
Outside
Natural Habitat Adventures Ranked
“Best Outfitter”
NatGeo
Voted Best Winter Trip: Natural Habitat Adventures' Monarch Butterfly Migration, Mexico
VIEW MORE AWARDS

Request Your 2023 Catalog

Discover the World's Best

Nature Travel Experiences

Nathab 2024 Catalog

Together, Natural Habitat Adventures and World Wildlife Fund have teamed up to arrange nearly a hundred nature travel experiences around the planet, while helping to protect the magnificent places we visit and their wild inhabitants.

Natural Habitat Adventures Logo WWF Logo
Request Your 2024/2025 Catalog
Continued - Page 2 of 2
To help us customize your catalog request, please tell us more about your travel needs:
Thank you for requesting a catalog
We’ve received your request. If you have any questions about our trips, please feel free to contact an Adventure Specialist today by calling 800-543-8917.

Get Weekly Updatess

Discover the World's Best

Nature Travel Experiences

Our weekly eNewsletter highlights new adventures, exclusive offers, webinars, nature news, travel ideas, photography tips and more. Sign up today!

Natural Habitat Adventures Logo WWF Logo
Send Me Travel Emails
Privacy Policy
Thank you for joining our email list!

Look for a special welcome message in your inbox, arriving shortly! Be sure to add naturalhabitat@nathab.com to your email contacts so you don’t miss out on future emails.

Send Us a Message

Send Us a Message

Have a question or comment? Use the form to the right to get in touch with us.

Natural Habitat Adventures Logo WWF Logo
Send Us a Message
Thank you for your message

We’ll be in touch soon with a response.

Refer a Friend

Refer a Friend,
Get $250 Off
Earn rewards for referring your friends! We'd like to thank our loyal travelers for spreading the word. Share your friend's address so we can send a catalog, and if your friend takes a trip as a first-time Nat Hab traveler, you'll receive a $250 Nat Hab credit you can use toward a future trip or the purchase of Nat Hab gear. To refer a friend, just complete the form below or call us at 800-543-8917. It's that easy! See rules and fine print here.
Natural Habitat Adventures Logo WWF Logo
Refer a Friend

Earn rewards for referring your friends! We'd like to thank our loyal travelers for spreading the word. Share your friend's address so we can send a catalog, and if your friend takes a trip as a first-time Nat Hab traveler, you'll receive a $250 Nat Hab credit you can use toward a future trip or the purchase of Nat Hab gear. To refer a friend, just complete the form below or call us at 800-543-8917. It's that easy! See rules and fine print here.

Thank you for the referral!

We've received your friend's information.

View Our 2023 Digital Catalog

View Our 2024/2025

Digital Catalog

Help us save paper! We offer a digital version of The World's Greatest Nature Journeys. If you'd prefer a mailed copy, please provide your contact details here. To view our digital catalog, please enter your info in the form to the right.
Natural Habitat Adventures Logo WWF Logo
View Digital Catalog
Happy browsing!

Thanks for requesting access to our digital catalog. Click here to view it now. You’ll also receive it by email momentarily.

Our Trips

Polar Bear Tours

Polar Bear Tours

African Safaris

African Safaris

Galapagos Tours

Galapagos Tours

Alaska Adventures

Alaska Adventures

U.S. National Parks Tours

U.S. National Parks Tours

Canada & the North

Canada & the North

Europe Adventures

Europe Adventures

Mexico & Central America Tours

Mexico & Central America Tours

South America Adventures

South America Adventures

Asia & Pacific Adventures

Asia & Pacific Adventures

Antarctica & Arctic Journeys

Antarctica & Arctic Journeys

Adventure Cruises

Adventure Cruises

Photography Adventures

Photography Adventures

Women's Adventures

Women's Adventures

Family Adventures

Family Adventures

New Adventures

New Adventures

Questions? Call 800-543-8917

Contact Us

Have a question or comment?
Click any of the buttons below to get in touch with us.

Hours
Mountain Time

  • 8 am to 5 pm, Monday - Friday
  • 8 am to 3 pm on Saturday
  • Closed on Sunday
Call 800-543-8917
Questions? Click to Chat
Questions? Click to Chat
/know-before-you-go/galapagos-islands/galapagos-islands-plants/