''Chaptalia albicans'', the white sunbonnet, is a plant species native to

Mexico Mexico ( Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guate ...

Central America Central America ( es, América Central or ) is a subregion of the Americas. Its boundaries are defined as bordering the United States to the north, Colombia to the south, the Caribbean Sea to the east, and the Pacific Ocean to the west. ...

and the

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. It is known from

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, Guatemala,

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, Honduras, southern

Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, a ...

(only in

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), the

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, San Luis Potosí,

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and

Chiapas Chiapas (; Tzotzil and Tzeltal: ''Chyapas'' ), officially the Free and Sovereign State of Chiapas ( es, Estado Libre y Soberano de Chiapas), is one of the states that make up the 32 federal entities of Mexico. It comprises 124 municipalities ...

. ''Chaptalia albicans'' is a herb forming a rosette of leaves. Leaves are elliptical, with margins that are wavy or slightly toothed but not lobed. Flowering stalks up to 15 cm tall at flowering time, 40 cm when the fruits are mature. Heads erect, with

ray flower The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae we ...

s up to 0.3 mm across.

Achenes An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and indehiscent (they do not op ...

are up to 12 mm long, with a thread-like beak 50-67% as long as the body of the achene, usually hairless.Nesom, G. L. 1995. Revision of ''Chaptalia'' (Asteraceae: Mutisieae) from North America and continental Central America. Phytologia 78: 153–188.
/ref>Simpson, B.B. 1978. ''Chaptalia''. North American Flora II 10:3-7.

References

{{Taxonbar, from=Q15574061 Mutisieae Flora of Florida Flora of the Bahamas Flora of the Caribbean Flora of Central America Flora of Mexico Plants described in 1781 Flora without expected TNC conservation status