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Reevesia rotundifolia

Overview

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Critically Endangered
Threat status

Description

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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 Reevesia

Trees or rarely shrubs . Leaves simple , petiolate , pulvinate or not, usually entire, glabrous to densely pubescent with stellate hairs . Inflorescences paniculate , cymose or thyrsoid , many-flowered, bracteate . Flowers bisexual , pedicellate , pedicel articulate . Calyx campanulate or obconical , irregularly 3-5-lobed. Corolla rotate; petals (4 or) 5, clawed, auriculate or not, white, yellow, or pink. Stamens 15 in 5 groups of 3; filaments fused to ovary stipe to form androgynophore , upper part widening to enclose ovary; anthers sessile, usually in very congested head , 2-celled; staminodes 5, toothlike, minute. Ovary 5-locular, 5-lobed; ovules 2 per locule, ascending ; stigma sessile, 5-lobed. Capsule woody, loculicidally and septicidally dehiscent into 10 separate valves . Seeds (1 or) 2 per locule, superposed , winged , wing developing abaxially, membranous; endosperm reduced; cotyledons ± flat.

About 25 species: mostly in S Asia, two species in Central America (Mexico and Nicaragua) ; 15 species (12 endemic) in China.[2]

Habitat

Ecology: It is a scarce component of the understorey in monsoon forest .[3]

Taxonomy

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Notes

Publishing author : Chun Publication : in Sunyatsenia, i. 269 (1934).

Similar Species

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Members of the genus Reevesia

ZipcodeZoo has pages for 26 species, subspecies, varieties, forms, and cultivars in this genus:

R. botingensis · R. cavaleriei · R. formosana · R. glaucophylla · R. lancifolia · R. lofouensis · R. longipetiolata · R. lumlingensis · R. megaphylla · R. membranacea · R. orbicularifolia · R. pubescens · R. pubescens var. kwangsiensis · R. pubescens var. xuefengensis · R. pycnantha · R. rotundifolia · R. rubronervia · R. shangszeensis · R. siamensis · R. sinica · R. taiwanensis · R. thrsoidea · R. thyrsoidea · R. tomentosa · R. wallichii · R. xuefengensis

More Info

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Further Reading

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Notes

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Contributors

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. "Reevesia". in Flora of China Vol. 12 Page 302, 313. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  3. World Conservation Monitoring Centre 1998. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 19, 2008. [back]
Last Revised: 7/3/2009