Plants
- Aganisia cyanea , an orchid species from Latin America
- Hybrids between this species and other genera in subtribe Zygopetalinae are also known for having blue or nearly blue flowers
- Bletilla striata , a species of orchid from East Asia. A few varieties have light lavender-blue flowers.
- Cattleya , a genus of orchids. The "coerulea" forms of various species have violet-blue flowers, such as:
- Cleisocentron gokusingii, an almost entirely blue orchid from Borneo
- Cleisocentron merrillianum, an almost entirely blue orchid from Borneo
- Dendrobium ceraula , an orchid species from the Philippines also known as the "Horned Dendrobium". Closely related to Dendrobium victoriae-reginae
- Dendrobium cyanocentrum , an orchid species from New Guinea; see List of Dendrobium species
- Dendrobium leucocyanum , an orchid species from New Guinea; see List of Dendrobium species
- Dendrobium victoriae-reginae , an orchid species from the Philippines also known as "Queen Victoria's Dendrobium"
- Disa graminifolia , an orchid species from South Africa
- Disa purpurascens , an orchid species from South Africa
- Glossodia major , an orchid species from Australia
- Pabstia jugosa, an orchid species from Brazil
- Pescatoria coelestis, an orchid species from Latin America
- Phalaenopsis violacea , an orchid species from Southeast Asia. Certain strains of the coerulea form have violet-blue flowers
- Rhynchostylis coelestis , an orchid species from Indochina
- Thelymitra , a genus containing truly blue orchids, including:
Thelymitra crinita, commonly known as the blue lady orchid, the queen orchid, the lily orchid, is a species of orchid which is endemic to the south-west of Western Australia. It has a single broad, oval leaf and up to fifteen brilliant blue flowers with a blue column with the lobe on top of the anther covered with short, finger-like calli.
Thelymitra cyanea, commonly known as the veined sun orchid in Australia and as the swamp sun orchid or striped sun orchid in New Zealand, is a species of orchid which is native to New Zealand and south-eastern Australia. It has a single erect, fleshy, channelled leaf and up to five bright blue flowers with darker blue veins. It is usually found growing in swamps, sphagnum bogs, and subalpine herbfields, often in clonal colonies.
Thelymitra ixioides, known as the spotted sun orchid or dotted sun orchid, is a species of orchid that is native to southern and eastern Australia and to New Zealand. It has a single long, thin, dark green leaf and up to ten flowers which occur in a range of colours, most commonly blue to purple but usually with small, dark blue spots. It is a variable species, similar to T. juncifolia which has smaller flowers.
- Thelymitra venosa
- Thelymitra angustifolia
- Tuberolabium woodii, an orchid species from the Philippines
- Vanda coerulea , an orchid species from South Asia
- Hybrids of this species with others in subtribe Aeridinae also have deep purple-blue flowers
In the botanical classification of plants, Aeridinae is a subtribe of the Tribe Vandeae whose representatives all have a monopodial growth habit and do not possess pseudobulbs.
- Vanda coerulescens , an orchid species from South Asia
- Vanda tessellata , an orchid species from South Asia
Aganisia cyanea is a showy species of orchid native to Colombia, Venezuela, Peru and Brazil and widely cultivated elsewhere as an ornamental. It is remarkable because some cultivars of this species produce blue flowers, the color blue being quite rare among the orchids. They are considered difficult to maintain in cultivation without a controlled growing environment.
Zygopetalinae is an orchid subtribe in the tribe Cymbidieae with 418 species.
Bletilla striata, known as hyacinth orchid or Chinese ground orchid, is a species of flowering plant in the orchid family Orchidaceae, native to Japan, Korea, Myanmar (Burma), and China.
