Highland Tropics - What's in Bloom?

The Conservatory of Flowers is one of only four institutions in the United States to feature a Highland Tropics display. The gallery mimics the misty cloud forests of tropical mountaintops. Dense mosses, Impatiens, and Gesneriads engulf rocks. Majestic Rhododendrons and tree ferns grow from the forest floor. Also featured is the renowned collection of delicate high-altitude orchids. Many of these orchids are epiphytes, which are plants that grow on other plants, including the infamous Dracula orchids that hang throughout.

Click Bloom thumbnail to enlarge

Coelogyne mooreana

Location in Conservatory: Highland Gallery

Native to: Vietnam

 

Numerous fragrant flowers on the inflorescence open simultaneously for a lovely show lasts for four to six weeks. The sepals and petals are snow white except for a golden yellow blotch on the lip.
Coelogyne mooreana has gained in popularity by orchid growers. It is found at about 4,000 feet in the relatively mild mountains of central Vietnam where the temperatures don't get higher than 90 or lower than 40 degrees. It requires lower humidity in the winter, when it rains less in its native habitat, and high humidity the rest of the year. 

Coelogyne mooreana is a cool-growing orchid with numerous fragrant flowers on the inflorescence. The flowers open simultaneously for a lovely show lasts for four to six weeks. The sepals and petals are snow white except for a golden blotch on the lip.

 

Coelogyne mooreana has gained in popularity by orchid growers because it is realtively easy to recreate it's native growing conditions. It is found at about 4,000 feet in the mild mountains of central Vietnam where the temperatures don't get higher than 90 or lower than 40 degrees. It requires lower humidity in the winter, when it rains less in its native habitat, and high humidity the rest of the year. 

Coelogyne Orchids

Native to: India, Southeast Asia, Philippines, Indonesia

 

The orchid genus Coelogyne is comprised of about 200 species. A number are on display in the Potted Plants Gallery. Most of the species are relatively easy to grow and produce long-lasting, fragrant flowers, and they can go weeks in their winter dormant season without water. They often have elaborately marked lips to attract pollinators, which include bees, wasps, and beetles.

Dracula Orchid

Location in Conservatory: hanging in the Highland Gallery 
Native to: South and Central America

This plant is a Dracula orchid in the subtribe Pleurothallid. You might assume that the name is a reference to the fictional vampire, Count Dracula, but in Greek, Dracula literally means "little dragon". When fully open, the flower resembles a dragon’s face. 
 
Living in the cloud forest of the tropics, Dracula orchids are a remarkable example of mimicry. Mimicry is an adaptation that allows an organism to look like another plant, animal, or in this case, a fungus. Dracula flowers look and smell like fleshy mushrooms to attract pollinating flies.

You might assume that the name "Dracula" is a reference to the fictional vampire, Count Dracula, but in Greek, Dracula literally means "little dragon". When fully open, the flower resembles a dragon’s face. 

 

Found in the cloud forest of the tropics, Dracula orchids are a remarkable example of mimicry. Mimicry is an adaptation that allows an organism to look like another plant, animal, or in this case, a fungus. Dracula flowers look and smell like fleshy mushrooms to attract the flies that pollinate them.

 

Some Dracula species, like D. vampira, have burgundy or maroon flowers that hang like pendants below the plant. Others have white flowers on erect stems. 

Impatiens mengtszeana

Location in Conservatory: Highland Gallery

Native to: China

 

Like orchids, Impatience species have evolved to appeal to a particular pollinator such as birds, bees, moths, and butterflies. The lower most sepal of this I. mengtszeana is elongated and forms a spur that is filled with nectar to attract pollinators. The petals of I. mengtszeana are pale yellow and blush colored. The four lateral petals of the flowers are always united in pairs and each pair appears to be one large petal. This rare plant can grow in Bay Area gardens under the right conditions.

Impatiens niamniamensis

Common name: parrot Impatiens, candy corn Impatiens

Location in Conservatory: Highland and Potted Plants Galleries

Native to: East Africa

 

Impatiens niamniamensis is an evergreen, perennial species that usually grows 2 to 3 feet tall. The unusual flowers bloom all year and dangle off the branches like little tropical birds. 

 

An interesting adaptation of this plant is its method of seed distribution. The scientific name Impatiens is Latin for "impatient" and refers to the plant's seed capsules. When the capsules mature, they explode when touched, sending seeds several yards away. 

Lycaste Orchid

Location in Conservatory: Highlands Gallery

Native to: Mexico to Peru

 

This orchid genus produces large, long-lasting, waxy, sometimes fragrant, triangular flowers. The plants are distinctive for their egg-shaped pseudobulbs and broad, pleated leaves. 

 

Lycaste flowers, like all orchid blooms, have three petals and three sepals. With some orchid species, it's difficult to identify these parts. Masdevallia orchids, for example, have fused sepals and a hidden petal. In this Lycaste photo (click on the photo to enlarge) the parts are easily identifiable. Three light green sepals are behind two spotted white petals. The third petal is in the shape of a pitcher spout. This third petal is often called the lip or labellum and provides a perch for the flower's pollinator. Protected by the petals and lip is the column, the orchids reproductive parts, which include the pollen. 

Magnolia liliifera

Common name: egg magnolia

Location in Conservatory: Highland Gallery, north side

Native to: northern Thailand, North-East India, endangered in its native habitat

 

The egg magnolia is one of the most valuable ornamental trees of Asia because of its fragrance. The flowers are small relative to many varieties of magnolia, but the scent of the flowers is intense. When blooming, the fragrance of tropical fruit fills the Highland Gallery. The flowers themselves grow on the upright tips of stems and last only a day. The common name ‘egg magnolia’ derives from the egg like shape of the blooms.

Common name: egg magnolia
Location in Conservatory: Highland Gallery, north side
Native to: northern Thailand, North-East India, endangered in it's native habitat
 
The egg magnolia is one of the most valuable ornamental trees of Asia because of it's fragrance. The flowers are small relative to many varieties of magnolia, but the scent of the flowers is intense. When blooming, the fragrance of tropical fruit fills the Highland Gallery. The flowers themselves grow on the upright tips of stems and last only a day. The common name ‘egg magnolia’ derives from the egg like shape of flowers.

 

 

Masdevallia Orchids

Location in Conservatory: Highland Gallery

Native to: Mexico to Brazil

 

Masdevallias are a genus of 350 cool-growing orchid species. They are best known for their unusual triangle-shaped flowers made up of sepals fused into a tube-like structure. Though the flower shape is similar from plant to plant, the difference in size and color is wide and wonderful. 
The Conservatory’s orchids are placed in galleries where the temperature and humidity are closest to their native environment. The Highlands gallery recreates a cloud forest. Most Masdevallias are from high altitude cloud forests from Mexico to Brazil and require very cool conditions and abundant moisture throughout the year. 

Masdevallia is a genus of 350 cool-growing orchid species found in cool cloud forests as lithophytes (on rocks) and epiphytes (on other plants). They are best known for their unusual triangle-shaped flowers made up of sepals fused into a tube-like structure. Though the flower shape is similar from plant to plant, the difference in size and color is wide and wonderful. An interesting adaptation of this plant is the diverse scents, colors and texture of the group that relate to the small fruit flies that pollinate them. Scents range from rotting gorgonzola to a ripe peach or apple.

 

The Conservatory’s orchids are placed in galleries where the temperature and humidity are closest to their native environment. The Highlands gallery recreates a cloud forest. Most Masdevallias are from high altitude cloud forests from Mexico to Brazil and require cool conditions and abundant moisture throughout the year. 

Medinilla

Location in Conservatory: Highland, Aquatic, Potted Plants Galleries

Native to: Africa, Madagascar, Asia, Pacific Islands

 

Medinilla are a species of evergreen shrubs with white, pink, or orange flowers. The flowers are arranged on a "panicle", which is a branched cluster of flowers. When pollinated, the plant bares showy berries. The leaves on many species of Medinilla are arranged in a whorl or are alternating. This allows the maximum amount of sunlight to hit each leaf instead of blocking sun from hitting the leaf below it on the stem.

Miltonia/Miltoniopsis Orchid

Common name: pansy orchid

Location in Conservatory: Highland Gallery

Native to: Peruvian Andes

 

This cheery orchid flower looks like a cross between a pansy and a butterfly. Native to the cloud forest, this orchid demands high humidity and cooler temperatures. An interesting adaptation of these epiphytes is that a number of species display markings on their lips which glow under ultra-violet light visible to bees, a likely pollinator.

 

The Miltoniopsis orchid was once considered a Miltonia. A separate genus was then formed, but the two are so often hybridized that all but the most serious orchid growers call Miltonia orchids Miltoniopsis.

Pleurothallis gargantua

Common name: giant bonnet orchid

Location: Highland Gallery, on the tree with the orchid sculptures

Native to: Ecuador

 

This terrestrial orchid can be found in the steep mountain forests in Ecuador, between 4500 and 7500 feet above sea level. It grows in cool and wet conditions, but can tolerate wildly fluctuating temperatures such as those found in its native habitat.

 

Despite its flower only being inches wide, the Pleurothallis gargantua has the largest bloom of its genus. Its lower sepal is a dark burgundy, while its upper sepal is lighter with veins of the same color. The flower grows out of the base of the leaf, and is pollinated by tiny insects such as gnats or grass flies. It has two pollinia, a trait that it shares with the rest of its genus. 

Pleurothallis Orchids

Location in Conservatory: Highland Gallery

Native to: mostly highland areas in Central and South America

There are over 1,000 species of Pleurothallis orchids. Although often very small, as a group they show a huge range in vegetative form. They are terrestrial (in the ground) or epiphytic (on a plant), and can be found as tall cane-like plants, clumped or trailing, pendent or climbing, and delicate moss-like species that can grow on the thinnest of twigs.
Pleurothallis flowers are among the most diverse and unusual and specialize in using tiny insects such as gnats for pollination. The flowers of many of the species at the Conservatory grow from the base of the heart-shaped leaves. Also emerging from the leaves are ariel roots and new plants. Pleurothallis orchids reproduce vegitatively. These new plants are often called a keiki (pronounced key-key), which is Hawaiian for "baby".

 

There are over 1,000 species of Pleurothallis orchids. Although often very small, as a group they show a huge range in vegetative form. They are terrestrial (in the ground) or epiphytic (on a plant), and can be found as tall cane-like plants, clumped or trailing, pendent or climbing, and delicate moss-like species that can grow on the thinnest of twigs.

 

Pleurothallis flowers are among the most diverse and unusual and specialize in using tiny insects such as gnats for pollination. The flowers of many of the species at the Conservatory grow from the base of the heart-shaped leaves. Also emerging from the leaves are ariel roots and new plants. Pleurothallis orchids reproduce vegitatively. These new plants are often called a keiki (pronounced key-key), which is Hawaiian for "baby".

Pleurothallis restrepiodes

Location in Conservatory: Highland Gallery

Native to: mostly highland areas in Central and South America

 

Pleurothallis flowers are among the most diverse and unusual and specialize in using tiny insects such as gnats for pollination. The flowers of many of the species at the Conservatory grow from the base of the heart-shaped leaves. The Pleurothallis restrepiodes inflorescence also emerges from the leaf. The purple and white flowers dangle in a claw-like position and the foul smell attracts it's pollinator. Also in bloom towards the top of this tree is the P. truncata, which is recognized by the inflorescence of a dozen tiny orange flowers.

Sobralia Orchid

Location in Conservatory: Highland Gallery, Potted Plants Gallery

Native to: South and Central America

 

The large fragrant flowers of Sobralia orchids have beautiful multi-colored lips. The Highland Gallery features plants with pink or yellow flowers. Flowers can be 6 inches across and appear sequentially on the inflorescence. The flowers are very short-lived, lasting a day or less. The plants have lance-shaped veined leaves arranged along the stem, which can grow as tall as 20 feet depending on the species. Most orchids are epiphytes but many Sobralia species are terrestrial, which means they grow in the ground rather than in the trees.

Tillandsia umbellata

Location in Conservatory: Highlands Gallery

Native to: Ecuador

 

The flower of this Tillandsia is an uncommon blue. It loosely resembles a native California iris but is actually in the Bromeliad family. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests. It is threatened by habitat loss.

 

Vireya Rhododendron

Native to: S.E. Asia

 

Vireyas grow in cool mountainous regions of Southeast Asia, either as epiphytes high in the tall trees of the cloud forest or on open ground in shrubberies.

 

There are over 300 Vireya species, comprising approximately one third of all Rhododendrons.

 

Many Rhododendrons make poisonous nectar. This poison helps to keep herbivores away, but is harmful to humans who consume honey made with the nectar.

Zygopetalum

Native to: Tropical South America

 

Zygopetalum is a genus in the orchid family (Orchidaceae) with approximately 15 species. This group of orchids is native to tropical South America and can be found in Brazil, Peru, Argentina, Bolivia, and Paraguay. Zygopetalum orchids occur in wet forests at moderate altitudes and are best grown in intermediate temperatures. Most species in this genus are epiphytic, meaning they grow on other plants. The long-lasting flowers are quite stunning with bold colors in shades of green, burgundy, and purple and are known to be very fragrant.