Costaceae

Cladus: Eukaryota
Regnum: Plantae
Divisio: Magnoliophyta
Classis: Liliopsida
Subclassis: Commelinidae
Ordo: Zingiberales
Familia: Costaceae
Genera: Chamaecostus - Cheilocostus - Costus - Dimerocostus - Monocostus - Paracostus - Tapeinocheilos

Name

Costaceae Nakai, 1941.

References

* Nakai, T. J. Jap. Bot. 17: 203. Apr 1941.
* Specht, C.D. & Stevenson, D.W. 2006. A new phylogeny-based generic classification of Costaceae (Zingiberales) Taxon 55(1): 159 (157; fig. 1).

Costaceae or the Costus Family is a family of pantropical monocots. They belong to the order Zingiberales, which contains other horticulturally and economically important plants such as the banana (Musaceae), bird-of-paradise (Strelitziaceae), and edible ginger (Zingiberaceae). The seven genera contain about 100 species (1 in Monocostus, 2 in Dimerocostus, 16 in Tapeinochilos, 2 in Paracostus, ca. 8 in Chamaecostus, ca. 4 in Cheilocostus, ca. 80 in Costus) and are found in tropical climates of Asia, Africa, and Central/South America.

Costaceae are unique from other members of Zingiberales in that its species have 5 fused staminodes, rather than 2, and Costaceae contain no aromatic oils. The fused infertile stamen form a large petalloid labellum that often functions to attract pollinators. The flowers are generally solitary or aggregated in inflorescences. Inflorescences are arranged in a terminal head or spike, except for Monocostus. The simple leaves are entire and spirally arranged, with those toward base of the stem usually bladeless. Leaf bases have a closed sheath with a ligule, or projection at the top of the sheath. Fruit is a berry or capsule. The rhizome is fleshy with tuberous roots.

See also

Spiral Ginger, Costus barbatus

References

The Families of Flowering Plants by L. Watson and M. J. Dallwitz.
Family Costaceae
Specht, Chelsea D. & Stevenson, Dennis Wm. 2006. A new phylogeny-based generic classification of Costaceae (Zingiberales).Taxon 55(1):153-163.

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