View source for Orthosia ← Orthosia You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{Treatment/ID |accepted_name=Orthosia |accepted_authority=Decaisne in A. P. de Candolle and A. L. L. P. de Candolle |publications={{Treatment/Publication |title=Prodr. |place=8: 526. 1844 |year=1844 }} |common_names=Swallow-wort;milkweed vine |basionyms= |synonyms={{Treatment/ID/Synonym |name=Amphistelma |authority=Grisebach |rank=genus }} |hierarchy=Apocynaceae;Orthosia |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Apocynaceae]]</div><div class="higher-taxon"><small>genus</small>[[Orthosia]]</div></div> |etymology=Greek Orthosie, goddess of prosperity, and one of the Horae, daughters of Zeus and Themis |volume=Volume 14 |mention_page= |treatment_page= }}<!-- --><span class="statement" id="st-undefined" data-properties=""><b>Vines </b>herbaceous, woody only at base [scandent]; latex white. <b>Stems</b> twining, unarmed, glabrous. <b>Leaves</b> caducous [persistent], opposite, petiolate; stipular colleters interpetiolar; laminar colleters present or absent. <b>Inflorescences</b> axillary (extra-axillary) cymes, umbelliform to shortly racemiform [paniculiform], sessile [pedunculate]. <b>Flowers</b>: calycine colleters apparently absent; corolla yellow to light green (cream), campanulate [rotate or tubular], aestivation valvate; corolline corona absent; androecium and gynoecium united into a gynostegium adnate to corolla tube; gynostegial corona of 1 whorl of 5 segments connate at base; anthers adnate to style, locules 2; pollen in each theca massed into a rigid, vertically oriented pollinium, pollinia lacrimiform, joined from adjacent anthers by translators to common corpusculum and together forming a pollinarium. <b>Fruits</b> follicles, typically paired, variously oriented, brown, linear, smooth, glabrous. <b>Seeds</b> naviculate, not winged, linear, comose, not arillate. <b>x</b> = 10.</span><!-- -->{{Treatment/Body |distribution=se United States;Mexico;West Indies;Central America;South America. |discussion=<p>Species ca. 40 (1 in the flora).</p><!-- --><p>R. E. Woodson Jr. (1941) adopted a very broad (and evidently polyphyletic) circumscription of Cynanchum, including Orthosia. The isolated placement of Orthosia relative to Cynanchum and presumed relatives such as Metastelma was demonstrated by S. Liede et al. (2005). Superficially, the species are very similar to those of Metastelma in the small, linear leaves and tiny cream to yellow flowers. However, the often caducous leaves; deltate, glabrous corolla lobes; and commonly paired inflorescences and follicles provide a ready means in our region to distinguish Orthosia from Metastelma.</p> |tables= |references= }}<!-- --><!-- -->{{#Taxon: name=Orthosia |author=Mark Fishbein |authority=Decaisne in A. P. de Candolle and A. L. L. P. de Candolle |rank=genus |parent rank=family |synonyms=Amphistelma |basionyms= |family=Apocynaceae |distribution=se United States;Mexico;West Indies;Central America;South America. |reference=None |publication title=Prodr. |publication year=1844 |special status= |source xml= |genus=Orthosia }}<!-- -->[[Category:Treatment]][[Category:Apocynaceae]] Templates used on this page: Template:Apocynaceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/ID/Synonym (view source) Template:Treatment/Publication (view source) Return to Orthosia.