font settings and languages

Font Size: Large | Normal | Small
Font Face: Verdana | Geneva | Georgia
Languages:

Byttneria minytricha

Overview

[ Back to top ]

Critically Endangered

Threat status

Interesting Facts

[ Back to top ]
 

Description

[ Back to top ]

Family Sterculiaceae

Trees or shrubs , rarely herbs or liana; young growth usually stellately hairy ; bark mucilaginous and rich in fibers. Leaves alternate; stipules usually present caducous ; leaf blade simple , rarely palmately compound , entire, serrate, or parted . Inflorescence axillary or rarely terminal , paniculate , corymbose , racemose, or cymose , rarely solitary. Flowers unisexual , bisexual or polygamous. Sepals (3-) 5, ± connate , rarely free , valvate . Petals 5 or lacking, free or adnate to base of androecium, convolutely imbricate. Androgynophore usually present; filaments usually connate into a single tube ; staminodes 5, tonguelike or filiform , opposite to sepals, sometimes lacking; anthers 2-celled, longitudinally dehiscent . Pistil consisting of 2-5(or 10-12) ± connate carpels, or a single carpel; ovary superior, 2-5(or 10-12) -loculed; ovules 2 or more per locule; style 1 or as many as carpels. Fruit usually a capsule or follicle, dehiscent or indehiscent, very rarely a berry or nut. Seeds with abundant endosperm or endosperm lacking; embryo straight or curved .

About 68 genera and ca. 1100 species: tropics and subtropics of both hemispheres, a few in temperate regions ; 19 genera (two introduced ) and 90 species (39 endemic, three introduced) in China.

The Chinese genera fit into four distinct clades which can be treated as subfamilies of an enlarged Malvaceae or as distinct families. These are Sterculioideae/Sterculiaceae s.s. (genera 1-4), Helicteroideae/Helicteraceae (genera 5 and 6), Byttnerioideae/Byttneriaceae (genera 7-13), and Dombeyoideae/Pentapetaceae (genera 14-19) .[1]

Genus Byttneria

Lianas, shrubs , or subshrubs , rarely small trees . Stems armed or unarmed (in Flora area). Leaves simple , stipulate , petiolate ; leaf blade various shapes , but usually orbicular or ovate ; foliar nectaries present. Inflorescences axillary , cymes. Flowers bisexual , small. Sepals 5, connate at base . Petals 5, base clawed, upper part deeply concave , apex with long narrow appendage . Stamens 5, opposite petals; filaments connate into tube ; anthers 2-celled, extrorse ; staminodes 5, lamellate , apex obtuse , alternate with staminodes. Ovary sessile, 5-celled; ovules 2 per cell , anatropous , lower one aborted; style united almost to apex; stigma apical, inconspicuous or 5-lobed. Capsule globose , spiny , septicidally and loculicidally or only septicidally dehiscent into 5 valves , valves falling from axis. Seeds 1 per locule; endosperm absent; cotyledons foliaceous , 2-lobed.

About 130 species: mostly in tropical America, also Africa, SE Asia, Madagascar; three species in China.

The genus name has often been incorrectly spelled as "Buettneria."[2]

Habitat

Ecology: List of Habitats :

Taxonomy

[ Back to top ]

Notes

Publishing author : Crist?bal Publication : Bonplandia (Corrientes) 4: 204 1976

Similar Species

[ Back to top ]

Members of the genus Byttneria

ZipcodeZoo has pages for 0 species, subspecies, varieties, forms, and cultivars in this genus:

More Info

[ Back to top ]

Further Reading

[ Back to top ]

Notes

[ Back to top ]

Contributors

Data Sources

Accessed through GBIF Data Portal March 17, 2008:

Identifiers

Footnotes

  1. Ya Tang, Michael G. Gilbert & Laurence J. Dorr "Sterculiaceae". in Flora of China Vol. 12 Page 240, 264,299, 302. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. "Byttneria". in Flora of China Vol. 12 Page 303, 322. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
Last Revised: 7/22/2012