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Catasetum atratum

An epiphytic orchid from southern Brazil in genus Catasetum, with fusiform pseudobulbs, long three-veined linear-oblancolate leaves, and fragrant waxy flowers that appear on long, multi-flowered inflorescences in late spring and summer.

Is Catasetum atratum growing in your garden? Record it and all of your plants in Known.

Common Names

Lustrous Black Catasetum

Summary

Catasetum atratum Lindl., the Lustrous Black Catasetum, is a large orchid native to southern Brazil that grows as a warm to hot epiphyte in subtropical regions. It forms fusiform, clustered pseudobulbs with young pseudobulbs enveloped by papery sheaths that disintegrate over time, and carries up to nine linear-oblancolate, medium-green, plicate leaves with three prominent veins. It blooms in late spring to summer on a male, horizontal to arching basal inflorescence about 14 inches (36 cm) long, with a pendant rachis bearing 12 to 15 fragrant, waxy flowers, and the common name refers to black spots on the sepals and petals, with flowers about 2 inches (5 cm).

In cultivation, this orchid is grown as a warm to hot epiphyte and requires light to moderate shade, hot to warm conditions, heavy water and fertilizer when actively growing, with reductions after leaf fall.

Height

14 inches

Sunlight Requirements

Ideally partial shade.

Soil Type

No soil type; epiphytic on trees in wet tropical forests.

Bloom Color

Black

Bloom Time

Spring and Summer

Foliage Color

Medium green

Leaf Lifecycle

Deciduous

Seasons of Interest

Spring and Summer

Taxonomy

Taxonomic Rank
Species
Author
Lindl.
Publication
Edwards's Bot. Reg. 24(Misc.): 61 (1838)

Superior Taxa

Kingdom
Plantae
Subkingdom
Pteridobiotina
Phylum
Angiosperms
Order
Asparagales
Family
Orchidaceae
Genus
Catasetum

Synonyms

Monachanthus atratus Catasetum pallidum

References

IOSPE PHOTOS. orchidspecies.com.
Catasetum atratum. en.wikipedia.org.
Catasetum atratum | International Plant Names Inde…. ipni.org.
Lustrous Black Catasetum - Catasetum atratum. observation.org.
Catasetum atratum Lindl. | Plants of the World Onl…. powo.science.kew.org.
Open Tree taxonomy: Catasetum atratum. tree.opentreeoflife.org.
Catasetum atratum. wikidata.org.
World Flora Online. worldfloraonline.org. June 2024.