, or vines
, rarely subshrubs
or herbs, with latex or rarely watery juice. Leaves simple
, opposite, rarely whorled
or alternate, pinnately veined; stipules absent or rarely present. Inflorescences cymose
, with bracteoles. Flowers bisexual
, 5- [or 4]-merous, actinomorphic
. Calyx 5- or rarely 4-partite, quincuncial, basal glands
usually present. Corolla 5- or rarely 4-lobed, salverform
, or rarely rotate, lobes
overlapping to right
or left, rarely valvate
. Stamens 5 or rarely 4; filaments
or connivent into a cone adherent
to pistil head
, dehiscing longitudinally, base
, cordate, sagittate, or prolonged into an empty spur; pollen granular
; disc ringlike or cup-shaped, 2-5-lobed, or absent. Ovaries superior, rarely half-inferior, connate
, 1- or 2-locular; ovules (1 or) 2-numerous per locule. Style 1; pistil head capitate, conical
, or lampshade-shaped, base stigmatic, apex 2-cleft and not stigmatic
. Fruit a berry, drupe, capsule, or follicle. Seeds with or without coma; endosperm thick and often horny
, scanty, sometimes absent; embryo straight or nearly so, cotyledons often large, radicle terete
About 155 genera and 2000 species distributed primarily in the tropics and subtropics, poorly represented in the temperate regions . Of the 44 genera and 145 species present in China, one genus and 38 species are endemic, and nearly 95% of the taxa grow in the southern and southwestern portions of the country.
Fruit type is highly diversified in the family , and it is diagnostic of many genera. Genera 1-4 produce 1, 2-celled berries from a flower; genus 5 produces 2, 1-celled berries from a flower; 6 and 7 produce mostly fleshy follicles containing deeply indented seeds with ruminate endosperm; 8 has follicles and winged seeds; 9 produces follicles and seeds with 2 comas; 10-12 have follicles with globose seeds; 13-18 have drupes mostly with fleshy mesocarp; 19 has samaroid fruit; 20 has spiny capsules with seeds winged all around; and 21-44 have free or fused follicles and comose seeds. Double flowers are known only from cultivated forms of Nerium oleander, Tabernaemontana divaricata, and Wrightia religiosa.
Plants of the Apocynaceae are often poisonous and are rich in alkaloids or glycosides, especially in the seeds and latex. Some species are valuable sources of medicine, insecticides , fibers, and rubber.
, latex present. Branches whorled
, mostly 4 or 5 together. Leaves whorled, rarely opposite; lateral
, ending in a marginal
. Cymes terminal
, usually 1-5 in thyrses
umbels, terminal. Flowers white, yellow, or pink. Calyx without glands
. Corolla salverform
in distal half, pubescent
inside, lobes overlapping to right
or left. Stamens included
near or above middle
of corolla tube; anthers
from pistil head
, not caudate
; disc absent or of scales
. Ovaries 2, distinct
or connate, ovules numerous. Follicles 2, free or connate. Seeds oblong
, long bearded
at both ends; endosperm thin; cotyledons up to twice as long as radicle.
About 60 species: tropical Asia, Africa, C America, N Australia, Pacific Islands; eight species in China.
Biome: Terrestrial .
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Kenrick & Crane, 1997
- Brongniart, 1843
- Takhtajan, 1967
- Superorder: Gentiananae () - Thorne Ex Reveal, 1992
- Subclass: Asteridae () - Takhtajan, 1967
- Class: Magnoliopsida () - Brongniart, 1843 - Dicotyledons
- Infraphylum: Radiatopses () - Kenrick & Crane, 1997
- Subphylum: Euphyllophytina ()
- Phylum: Tracheophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Publishing author : Tsiang Publication : Sunyatsenia 6: 112 1941
Members of the genus Alstonia
ZipcodeZoo has pages for 6 species, subspecies, varieties, forms, and cultivars in this genus:
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- IUCN. 2004. 2004 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 23 November 2004.
- Tsiang Ying & Li Ping-tao. 1977. Apocynaceae. Fl. Reipubl. Popularis Sin. 63: 1-249.
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.
- China Plant Specialist Group 2004. Alstonia henryi. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloadedon 30January2012.
- IUCN 2012. IUCN Red List of Threatened Species. Version 2011.2. . Downloaded on January 28, 2012.
- Biodiversity Heritage Library NamebankID: 5989950
- Globally Unique Identifier: urn:lsid:ipni.org:names:76542-1
- International Plant Names Index (IPNI) ID: 76542-1
- IUCN ID: 190128
- Zipcode Zoo Species Identifier: 1029357
- Bingtao Li, Antony J. M. Leeuwenberg & David J. Middleton "Apocynaceae". in Flora of China Vol. 16 Page 143. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
- "Alstonia". in Flora of China Vol. 16 Page 154. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
- China Plant Specialist Group 2004. Alstonia henryi. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 30 January 2012. ... [back]