The garden has more than 20,000 accessions, representing 324 plant families, 12,000 different
species and
subspecies, and 2,885
genera. Outdoor collections are, in general, arranged geographically and nearly all specimens were collected in the wild. The major family collections include:
cactus (2,669 plants),
lily (1,193 plants),
sunflower (1,151 plants), erica (897 plants), and
orchid (950 plants). Other families include about 500 types of
ferns and fern allies,
Chinese medicinal herbs, plants of economic importance, old
rose cultivars, and California native plants. Sets of greenhouses contain
succulents,
epiphytes, ferns,
carnivorous plants, and tropicals.
Geographic layout The garden collections are geographically organized, and include: ;South Africa – featuring
South African plants, including: lilies,
Proteas,
ice plants,
Aloes, and
Encephalartos. ;Asia — featuring a
Rhododendron collection (259 taxa, 397 accessions), including many mature trees. (Rhododendrons too tender for most North American climates.)) Also present are specimens of the
redwood family, including the original dawn redwoods (
Metasequoia), and dozens of unusual shrubs, vines, and herbaceous species recently collected from China. ;Australasia – plants from Australia and New Zealand; with southern
beeches,
banksias,
myrtles such as
eucalyptus,
cycads, and
phormiums. ;California Native – over 4,000 accessions, including nearly one-half of the state's native vascular plant species and 174 taxa on the
California Native Plant Society's list of rare and endangered species –Prominent genera are:
manzanitas (
Arctostaphylos spp.) with 81 taxa (252 accessions), California-Lilacs (
Ceanothus spp.) with 55 taxa (164 accessions), and an almost complete collection of California bulbous
monocots in the
Lily and
Amaryllis families (
Fritillaria,
Calochortus,
Lilium,
Erythronium,
Allium,
Brodiaea) with 118 taxa (234 accessions) ;
Chinese Medicinal Herb Garden – selections from the pharmacopeia of modern China. specimens. siberica'' specimen. ;Mediterranean – exhibits flora from the region's countries, including: Morocco, Spain, Portugal, the
Canary Islands, Turkey, and Syria, on a hillside with views across the San Francisco Bay. ;Deserts of the Americas – bristles with cacti and other succulents from North and Central America, plus the high deserts of the Andes. ; Eastern North America – includes deciduous trees such as tulip tree (
Liriodendron), bald cypress (
Taxodium), and dogwoods (
Cornus). ;
Meso American – shows the diversity of Central American habitats with genera found in both mountain and desert areas such as
Agaves, oaks (
Quercus),
pines, and a range of brightly flowered
Salvias. ; South America – with a grove of
monkey puzzle trees (
Araucaria araucana), a collection of
fuchsias, and several species of
southern beech. The garden also has a selection of cultivars of
Lapageria. ;Greenhouses The garden's
greenhouses include: • the Arid House, presenting seasonal exhibits of cacti and succulents. • the
fern and
carnivorous plants house display diverse ferns and unusual insect-eating plants. • the tropical house (renovated in 2024) features tropical plants of economic value, and many curiosities such as the giant corpse lily
Amorphophallus.
Asian Plant Collection The UC Botanical Garden is home to the renowned Asian plant collection—a repository of some of the world's rarest and most precious flora. This botanical gem, however, was damaged by a colossal redwood tree's toppling during a powerful storm. Along with the Asian section “the top half of the garden’s only Parana pine tree, a critically endangered species from Brazil [,] a prized eucalyptus from Australia’s Queensland region and a gum-leaf cone bush from Southern Africa” were also damaged. In response, a team of experts swiftly converged on the site, located high in the hills above the UC Berkeley campus, with the urgent mission of rescuing and rehabilitating the battered plants to salvage what could be preserved. This effort was motivated by the exceptional difficulty in replacing these specimens, as many were originally sourced from the wild, making their preservation crucial. The UC Botanical Garden's Asian collection stands as both a unique botanical resource and a site of serene beauty. It holds historic significance, with its origins dating back to the early 1900s when plants were gathered from expeditions to western China and Tibet by explorers like
George Forrest and
Joseph Rock. What distinguishes this garden is its comprehensive documentation of each plant's provenance, contributing to its scientific value. In addition to the Asian section, several other Bay Area botanical gardens also experienced losses from the same devastating storm, highlighting the vulnerability of these curated collections to the unpredictable forces of nature. The arduous process of recovery involves the removal of debris to access damaged plant beds and then careful assessment and restoration work. Notably, the fate of these plants is uncertain, as they may not exhibit immediate signs of distress, and recovery is an ongoing process. Some plants are pruned for rehabilitation, while others are transported back to the garden's nursery, where cuttings are cultivated to create a new generation of the lost plant s. == Wildlife ==