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Acanthosyris annonagustata

Overview

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Threatened
Threat status

Description

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Family Santalaceae

Herbs or shrubs , rarely trees , usually root hemiparasites, occasionally aerial hemiparasites (Dendrotrophe and Phacellaria) ; nodes not articulated, mostly glabrous , less often hairy , hairs simple . Leaves usually alternate (opposite in Buckleya), sometimes scale-like (absent in Phacellaria) ; stipules absent; petiole often indistinct; leaf blade simple, usually pinnately veined, sometimes palmately 3-9-veined (in Dendrotrophe), margin entire. Inflorescences mostly axillary , occasionally terminal (in Buckleya), cymose , umbellate , paniculate , racemelike, spicate , or clustered, sometimes 1-flowered; bracts scale-like, small, sometimes forming involucre, sometimes ± adnate to pedicel (in Thesium) ; bracteoles sometimes present, paired . Flowers bisexual or unisexual (plants usually dioecious, rarely monoecious), actinomorphic , 3-6(-8) -merous, very small; perianth lobes 3-6(-8), slightly fleshy . Male flowers: perianth lobes valvate or slightly imbricate in bud, incurved or patent when flowering, sparsely hairy or with tongue-shaped appendage at the insertion of the stamens. Disk epigynous or perigynous, sometimes absent, margin sinuate or lobed , sometimes distinct , glandular or scaly . Stamens as many as and opposite to perianth lobes, usually on the base of lobes; filaments filiform , short; anthers gynobasic or dorsifixed near base, 2-celled, parallel or divaricate , dehiscence usually longitudinal . Female and bisexual flowers: perianth tube usually longer than that of male. Ovary inferior or half-inferior, 1- or 5-12-loculed; ovules 1-3(-5), anatropous or hemitropous , integument absent. Style 1; stigma capitate, small, truncate or lobed. Fruit a drupe or a nut, exocarp usually fleshy, endocarp crustaceous or bony. Seed 1, without a differentiated testa; endosperm copious , usually white and partitioned, fleshy; embryo cylindric , straight, small, smooth , rugose , or many ridged . 2n = 5, 6, 7, 12, 13+.

About 36 genera and 500 species: widely distributed in tropical and temperate regions ; seven genera and 33 species (13 endemic) in China.[1]

Taxonomy

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Notes

Publishing author : C.Ulloa & P.Jorg. Publication : Novon 8: 84, fig. 1998

Similar Species

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Members of the genus Acanthosyris

ZipcodeZoo has pages for 8 species, subspecies, varieties, forms, and cultivars in this genus:

A. annonagustata · A. asipapote · A. colombiana · A. falcata · A. glabrata · A. paulo-alvinii · A. platensis · A. spinescens

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal March 16, 2008:

Identifiers

Footnotes

  1. Nianhe Xia & Michael G. Gilbert "Santalaceae". in Flora of China Vol. 5 Page 208. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
Last Revised: 2009-07-03