Arundina graminifolia

Source: Ross

Arundina graminifolia

Arundina graminifolia or bamboo orchid has stems and leaves similar to bamboo.

It can reach 2 m high and blooms almost all year.

Originally from tropical Asia, is naturalized in regions with similar climate: Puerto Rico, Costa Rica, Jamaica, Panama, Hawaii, Reunion, Guadeloupe …

This orchid is very easy to grow. It take some abuse.

It is part of the family Orchidaceae, subfamily Epidendroideae, tribe Arethuseae, sub-tribe Arethusinae, genus Arundina. It is one of only two species of this genus.

Description:

Arundina graminifolia is a terrestrial orchid with long pseudo-bulbs. It forms large dense clumps of 70 cm to 2 m high.

The plaited linear leaves are oblong lanceolate, 9-19 cm long and 0.8-1.5 cm wide. The summit is acuminate. Stipules embrace the stalk.

Flowers are 5-8 cm in diameter. They grow in rather open terminal clusters with up to 10 flowers that bloom in succession. They are carried by racemes of 7-16 cm long. The flowers are white with a purple pink lip. The bracts are wide triangular and surround the main stem of the flower cluster. Flowering takes place from April to August.

The pods contain microscopic fertilized seeds and keikis often develop near the top of the stem after flowering.

Synonyms:

Arundina bambusifolia, Arundina chinensis, Arundina chinensis var. major, Arundina graminifolia var. chinensis, Arundina stenopetala, Bletia graminifolia

Origin:

Southeast Asia

Habitat:

Rainforests and mangroves, secondary forests and forest edge as well as disturbed sites or along roads, 0-1200 m.

Etymology:

Arundina: from the Greek arundo (reed)
Graminifolia: from the Latin graminifolius (with leaves like grass)

Care:

Temperature:

Diurnal: 24-29 °C
Nocturnal: 6-8 °C

Light:

In nature, they grow in full sun. Therefore provide them with as much light as possible.

Water:

Never let the substrate dry out completely. If you keep them moist at all times, they will grow vigorously.

Hygrometry:

70%, vaporize water if it is too dry, especially if the plant bears keikis.

Substrate:

1/3 sphagnum, 1/3 fine bark and 1/3 sand

Feed:

Provide specialized fertilizer for orchids, once a week.

Pot:

As this orchid forms fairly dense clumps and is rampant, provide a large pot.

Repot:

Every year in the spring.

Propagation:

Keikis:

When the keikis have roots about 5 cm, remove them and plant separately.

Division:

When repotting in the spring.

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