View source for Alstonia

{{Treatment/ID
|accepted_name=Alstonia
|accepted_authority=R. Brown
|publications={{Treatment/Publication
|title=Asclepiadeae,
|place=64. 1810
|year=1810
|other_info_on_pub=name conserved
}}
|special_status={{Treatment/ID/Special_status
|code=I
|label=Introduced
}}
|basionyms=
|synonyms=
|hierarchy=Apocynaceae;Alstonia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Apocynaceae]]</div><div class="higher-taxon"><small>genus</small>[[Alstonia]]</div></div>
|etymology=For Charles Alston, 1683–1760, Scottish professor of botany, University of Edinburgh
|volume=Volume 14
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>[shrubs]; latex milky. <b>Stems</b> erect, unarmed, glabrous [eglandular-pubescent]. <b>Leaves</b> persistent, whorled [opposite], petiolate; stipular colleters interpetiolar; laminar colleters absent. <b>Inflorescences</b> terminal, compound-cymose, pedunculate. <b>Flowers</b>: calycine colleters absent; corolla white, yellow, or cream, salverform, aestivation dextrorse [sinistrorse]; corolline corona absent; androecium and gynoecium not united into a gynostegium; stamens distinct, inserted at top of corolla tube; anthers not connivent, not adherent to stigma, connectives not appendiculate or enlarged, locules 4; pollen free, not massed into pollinia, translators absent; nectary annular. <b>Fruits</b> follicles, usually paired, pendulous, brown, slender, terete, surface striate, glabrous or pubescent. <b>Seeds</b> elliptic to oblong, flattened, marginally long-ciliate, not winged, not beaked, comose, not arillate. <b>x</b> = 11.</span><!--

-->{{Treatment/Body
|distribution=Florida;Asia;Africa;Indian Ocean Islands;Pacific Islands;Australia.
|introduced=true
|discussion=<p>Species ca. 43 (2 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaves in whorls of 3 or 4; corolla tube and throat together to 6.5 mm; flowering winter–spring.
|[[Alstonia macrophylla|Alstonia macrophylla]]
|-id=key-0-1
|1
|Leaves in whorls of 4–8; corolla tube and throat together 7+ mm; flowering fall.
|[[Alstonia scholaris|Alstonia scholaris]]
|}
</div></div><!--

-->{{#Taxon:
name=Alstonia
|author=David E. Lemke
|authority=R. Brown
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Apocynaceae
|distribution=Florida;Asia;Africa;Indian Ocean Islands;Pacific Islands;Australia.
|introduced=true
|reference=None
|publication title=Asclepiadeae,
|publication year=1810
|special status=Introduced
|source xml=
|genus=Alstonia
}}<!--

-->[[Category:Treatment]][[Category:Apocynaceae]]