Cosmocalyx

Cosmocalyx
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Gentianales
Family:	Rubiaceae
Subfamily:	Cinchonoideae
Tribe:	Hamelieae
Genus:	Cosmocalyx; Standl.
Species:	C. spectabilis
Binomial name
	Cosmocalyx spectabilis; Standl.

Cosmocalyx is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Cosmocalyx spectabilis, which is found in Mexico, Belize, and Guatemala.^[1]

Description[]

Cosmocalyx spectabilis is a slender tree, up to 15 m (49 ft) in height and 20 cm (7.9 in) in diameter (dbh). After anthesis, one of the four calyx lobes expands into a reddish, leaf-like structure called a calycophyll. These facilitate dispersal of the fruit by wind. The fruit is a cylindrical indehiscent bilocular capsule. Each locule contains one basally inserted seed. This combination of characters distinguishes Cosmocalyx from other genera in Rubiaceae.^[2]

Systematics[]

Cosmocalyx was named by Paul Standley in 1930.^[3] The generic name is derived from the Ancient Greek words, kosmos, meaning "order", and kalyx, "a calyx".^[4]

Cosmocalyx is placed with Deppea, Hoffmannia, Hamelia and several other genera in the tribe Hamelieae. Relationships within this tribe are uncertain.^[5]

References[]

^ "Cosmocalyx in the World Checklist of Rubiaceae". Retrieved 13 June 2014.
^ Delprete PG (1998). "Notes on calycophyllous Rubiaceae. Part III. Systematic position of the monotypic Mexican genus Cosmocalyx and notes on the calycophyll development". Brittonia. 50 (3): 309–317. doi:10.2307/2807774.
^ Cosmocalyx page 56. In: Paul C. Standley. 1930. "Studies of American Plants – III". Field Museum of Natural History. Botanical series. 8(1):3-73.
^ Quattrocchi U (2000). CRC World Dictionary of Plant Names. Vol. 1. Boca Raton, New York, Washington DC, London: CRC Press. ISBN 978-0-8493-2675-2.
^ Manns U, Bremer B (2010). "Towards a better understanding of intertribal relationships and stable tribal delimitations within Cinchonoideae s.s. (Rubiaceae)". Molecular Phylogenetics and Evolution. 56 (1): 21–39. doi:10.1016/j.ympev.2010.04.002. PMID 20382247.

External links[]

[WCSP-1] "Cosmocalyx in the World Checklist of Rubiaceae". Retrieved 13 June 2014.

[Delprete1998-2] Delprete PG (1998). "Notes on calycophyllous Rubiaceae. Part III. Systematic position of the monotypic Mexican genus Cosmocalyx and notes on the calycophyll development". Brittonia. 50 (3): 309–317. doi:10.2307/2807774.

[standley1930-3] Cosmocalyx page 56. In: Paul C. Standley. 1930. "Studies of American Plants – III". Field Museum of Natural History. Botanical series. 8(1):3-73.

[Quattrocchi2000-4] Quattrocchi U (2000). CRC World Dictionary of Plant Names. Vol. 1. Boca Raton, New York, Washington DC, London: CRC Press. ISBN 978-0-8493-2675-2.

[Manns2010-5] Manns U, Bremer B (2010). "Towards a better understanding of intertribal relationships and stable tribal delimitations within Cinchonoideae s.s. (Rubiaceae)". Molecular Phylogenetics and Evolution. 56 (1): 21–39. doi:10.1016/j.ympev.2010.04.002. PMID 20382247.

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