How to identify common orchids

In some of the larger flower markets; often see a variety of beautiful orchids for sale, how to identify these orchid species? Several common cultivated orchids are now introduced as follows, for flower lovers to choose when reference. Spring orchid: root fleshy, white, leaves narrow linear, about 20 cm to 25 cm long, edge with fine sharp serrations, veins obvious, 1 to 2 flowers per stem, yellow-green, fragrance quiet, early spring 2 to 3 months flowering. Cymbidium: root fleshy, pale yellow leaves linear, erect and thicker than spring orchid, rough leaf margin, a stem with 5 to 13 flowers, pale yellow, green white lips, red purple spots, flowers very fragrant, flowering April to May. Cymbidium: leaves broad linear, more upright, smooth leaf margin, a stem with flowers 16 to 12, yellow green or even fawn flowers, dark purple stripes, fragrance is very strong, flowering July to September. Cymbidium: leaves 50 cm to 100 cm long, 3 cm wide, smooth, apex pointed, erect, flowering stems about 60 cm high, a stem with 5 to 10 flowers, petals with purple-brown stripes, flowering winter to early spring, fragrant. Cold orchid: leaves narrow and erect, flower stem thin, erect, flowers 5 to 9, flowers small, petals narrow, yellow, white, green, red, purple and other colors, fragrance, flowering late autumn to early spring.