Phalaenopsis...
known as the Moth Orchid, abbreviated Phal in the horticultural trade, is an orchid genus of approximately 60 species. Phalaenopsis is one of the most popular orchids in the trade, through the development of many artificial hybrids. Moth Orchid is native to Southeast Asia (Thailand, Philippines, Malaysia, Indonesia, Southeast China).
Moth Orchid are epiphytic shade flower plants, but a few are lithophytes in the wild. Some species grow below the canopies of moist and humid lowland forests, protected against direct sunlight, others grow in seasonally dry or cool environments. This species have adapted individually to these three habitats.
Possessing neither pseudobulbs nor rhizome, Phalaenopsis shows a monopodial growth habit: a single growing stem produces one or two alternate, thick, fleshy, elliptical leaves a year from the top while the older, basal leaves drop off at the same rate. If very healthy, a Phalaenopsis plant can have up to ten or more leaves. The inflorescence, either a raceme or panicle, appears from the stem between the leaves. They bloom in their full glory for several weeks. If kept in the home, the flowers may last two to three months.
Phalaenopsis are among the most popular orchids sold as potted plants, owing to the ease of propagation and flowering under artificial conditions. They have become extremely easy to grow and bloom more flowers at home, as long as some care is taken to provide them with conditions that approximate their native habitats. Their commercial production has become an industry.
In nature, Phalaenopsis species are typically fond of warm temperatures, thriving in temperatures around 20 to 35 °C (68-95 °F), but are adaptable to conditions more comfortable for human habitation in temperate zones (15 to 30 °C or 59 to 86 °F); at temperatures below 18 °C (64.4 °F) overwatering causes root rot. Phalaenopsis requires high humidity (60-70%) and low light of 12,000 to 20,000 lux. However, Phalaenopsis orchids can adapt to the lower humidity found in most homes. They are also typically hardier than other species of orchids, and this makes them particularly popular among first-time orchid growers.
The flower spikes appear from the pockets near the base of each leaf. The first sign is a light green "mitten-like" object that protrudes from the basal leaf tissue. Over about three months the spike elongates until it begins to swell fat buds which will bloom.
Pic of Phalaenopsis amabilis ;

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