Coelogyne Rochussenii

coelogyne Rochussenii

Coelogyne (necklace orchids)

Coelogyne is a genus of over 200 sympodial epiphytes from the family Orchidaceae, distributed across India, China, Indonesia and the Fiji islands, The genus is abbreviated Coel in trade journals.
The wide distribution of this genus has resulted in a wide variety of temperature variation from species to species, some requiring cool to cold conditions to grow and bloom reliably, while others need decidedly warmer temperatures to achieve the same.

They have often a sweet scent, attracting different kinds of pollinators, such as bees, wasps and beetles.

A few species are commonly known as ‘necklace orchids’, because of their long, pendant, multi-flowered inflorescence.
Coelogynes could be divided to two big groups – so called “Cool” Coelogyne group and “Warm” Coelogyne group.
Cool Coelogynes:- come from mountain cloud forests of Himalayan, in nature they have warm but misty and cloudy summers and cool to cold but extremely sunny winters. Such Coelogynes such as large-flowered and extremely showy Coelogyne cristata, Coelogyne mooreana, Coelogyne mossiae, lovely Coelogyne fimbriata, Coelogyne nitida and Coelogyne corymbosa.
Warm Coelogyne group.:- They grow in much warmer biomes such as tropical rainforests, so they are more suitable for indoor growing because they do not need cold temperatures to grow and bloom. They are mostly epiphytes or lithophytes and occasionally terrestrials. Species such as Coelogyne speciosa, Coelogyne lawrenceana and Coelogyne salmonicolor with large single flowers, which have fancy lips need intermediate to warm temperatures, half shade to filtered bright light, moderate watering and fertilizers. Substrate should be epiphytic (medium bark) with some elements with high water capacity such as sphagnum moss. They have no definite dormancy period and simply need some reducing of watering after pseudobulbs had been formed.

coelogyne Rochussenii

Coelogyne rochussenii is a warm-growing, pendulous flowering orchid from low tropical areas of Singapore, Malaysia, Thailand and the Philippines.
It is really common in Singapore under cultivation and forms huge spectacular specimens with almost a curtain of pendulous spikes of flowers all around the pot.
Description

Plants bloom throughout the year with forty 6.25 cm wide flowers. Flowers can be fragrant with the scent of lemon.It’s grown for its handsome evergreen foliage and for its long draping clusters of fragrant, pale lemon-yellow blooms.Clusters of 20 to 40 buff-yellow blooms are borne on long dangling stems that sprout from the bases of old pseudobulbs in winter. Each blossom has five lance-shaped “petals” and a central creamy-white lip. The lip is marked with several yellow ridges and two brown bands.
Culture
Plants are usually grown in baskets. Plant grows in intermediate to warm temperatures with partial shade ( bright indirect or filtered light ).
Water regularly through the year. Pot in a well drain medium.
sources

1)http://orchids.wikia.com/wiki/Coelogyne_rochussenii
2)http://www.learn2grow.com/plants/coelogyne-rochusseni/
3) http://lkcnhm.nus.edu.sg/nis/bulletin2011/2011nis049-053.pdf
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Calanthe sylvatica

Calanthe masuca or Calanthe sylvatica  or The Forest-Dwelling Calanthe

cal-masuca

Calanthe sylvatica falls into the category of evergreen plants, those that require semi-shaded humus-rich soils as on the slopes of woodlands.

There are two main types of Calanthe in cultivation, deciduous and evergreen. The evergreen types have no rest period and should be kept somewhat damp all year.The deciduous types comprise one of the most satisfactory groups of all orchids, with inflorescences that bloom over a long period of time in the late autumn and winter. They grow well with cattleyas, where the bright light and warm

calanthe they are warm and hot growing orchids, so they do not need cool and cold temperatures to thrive and bloom. They are orchids from shady places, so they don’t need extremely high light levels as needed for Vanda orchids.

They are terrestrials, so they need a substrate for terrestrial orchids with sphagnum, cocoa chips, medium bark, perlite, but some grow them in common soil
watering is the only difference between evergreen and deciduous Calanthe – evergreen Calanthes need the same care all year round, while deciduous Calanthes have short dry dormancy, when they drop their leaves off, so in this case you simply have to stop watering and fertilizing at all until a new growth is visible. They are very easy and forgiving orchids, and it’s a pity that they are not so popular as could be.
Calanthe make a good pot plant for shaded patio area. Grow them in large pots Ensure the plants are kept cool during the summer and are not allowed to dry out at any time. Feed fortnightly with weak fertilizer.

Planting

Calanthe require well-aired and drained soil. Use of some compost rich in humus and pine bark is recommended. In the garden, they can be cultivated under the same conditions as hostas or ferns.

When potting Calanthe plants, the pseudobulbs must be half buried into the potting media.

Be sure to select a large enough pot (minimum diameter 30-40cm) in order to avoid impeding the development of the new peripheral shoots that will appear during the following year.
deciduous type

Since these plants are seasonal growers, it is important to maximize the size of the pseudobulb during their summer growth period by frequent applications of water and fertilizer. Once the pseudobulbs have matured, gradually reduce watering until leaves fall, when water should be withheld altogether. The broad leaves can be subject to spider mite, so keep humidity high and leaves clean. When necessary, apply insecticides.

The young Calanthe shoots appear and fully deploy their leaves as of April. Their flowering is optimal in May. Following the flowering, the foliage, fairly persistent, remains green at least until October before fading and disappearing completely. Calanthes then go into their winter dormancy. The faded leaves can be cut, preserving a stem height of 5 cm. Certain species present persistent foliage all year round.

Over the years and following the successive growth and dormancy cycles, Calanthe not only become stronger but also multiply, thanks to the annual appearance of new shoots.
Evergreen Type

evergreen plants have smaller pseudobulbs or completely lack them in some species

sources

Calanthe sylvatica

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Vanilla Orchid

vanila orchid

Vanilla comes from orchids.Vanilla flavoring is the product of the Vanilla orchid, scientific name Vanilla planifolia (Planifolia is Latin for “flat-leaved”).Vanilla orchids are vines with bright green, fleshy stems and leaves that grow singularly and alternately along the vine. Flowers grow in clusters of 12 to 20 buds, are usually about 6 inches long and yellow-green. The flowers bloom over the period of a month, and if pollinated, can potentially produce fruit (seed pods). The pods are harvested before fully ripe and then cured to create vanilla flavoring. The blooms only last one day; opening in the morning and closing at night.Vanilla planifolia is one of over 60 species of Vanilla orchid and has been around for almost 500 years.

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