Orthosia (plant)
# Orthosia (plant)

Orthosia is a genus of plants in the family Apocynaceae, first described as a genus in 1844.

## Species

* Orthosia arenosa Decne. - Brazil
* Orthosia bonplandiana (Schult.) Liede & Meve - Cuba
* Orthosia calycina (Schltr.) Liede & Meve - Peru
* Orthosia cassythoides (Suess.) Morillo - Venezuela
* Orthosia congesta (Vell.) Decne. - Brazil
* Orthosia cynanchoides W.D. Stevens - Chiapas
* Orthosia dusenii (Malme) Fontella - Brazil
* Orthosia eichleri E.Fourn. - Brazil
* Orthosia extra-axillaris W.D. Stevens - Costa Rica
* Orthosia glaberrima (Woodson) W.D. Stevens - Panama, Costa Rica
* Orthosia guilleminiana (Decne.) Liede & Meve - Brazil
* Orthosia henriqueana (Silveira) Liede & Meve - Minas Geraes
* Orthosia itatiaiensis Malme - Rio de Janeiro
* Orthosia latipes (Decne.) Malme - Brazil
* Orthosia loandensis Fontella & Valente - Paraná
* Orthosia melantha (Decne.) Malme - Brazil
* Orthosia multiflora E. Fourn. - Brazil
* Orthosia parviflora (E. Fourn.) Liede & Meve - Rio de Janeiro
* Orthosia pearcei (Rusby) Liede & Meve - Bolivia
* Orthosia pubescens (Greenm.) Liede & Meve - Morelos
* Orthosia ramosa W.D. Stevens - Honduras
* Orthosia rubens (L.O. Williams) W.D. Stevens - Guatemala
* Orthosia scoparia (Nutt.) Liede & Meve - Florida, Georgia, South Carolina
* Orthosia selloana (E. Fourn.) Liede & Meve - Brazil
* Orthosia smaragdina W.D. Stevens - Guatemala
* Orthosia stipitata W.D. Stevens - Chiapas
* Orthosia tarmensis Schltr. - Peru
* Orthosia thymifolia Schltr. - Peru
* Orthosia umbrosa Decne. - Rio de Janeiro
* Orthosia urceolata E.Fourn. - Brazil
* Orthosia virgata (Poir.) E. Fourn. - Argentina
* Orthosia woodii Meve & Liede - Bolivia

## formerly included

* O. acuminata, syn of Matelea acuminata
* O. bahiensis, syn of Ditassa capillaris
* O. cardozoi, syn of Cynanchum cardozoi
* O. ecuadorensis, syn of Cynanchum densiflorum
* O. ellemannii, syn of Cynanchum ellemannii
* O. grandis, syn of Jobinia grandis
* O. kunthii, syn of Cynanchum kunthii
* O. meridensis, syn of Cynanchum meridense
* O. misera, syn of Metastelma miserum
* O. oblongata, syn of Matelea oblongata
* O. serpyllifolia, syn of Vincetoxicum serpyllifolium
* O. stannardii, syn of Cynanchum stannardii
* O. stenophylla, syn of Cynanchum trianae
* O. suberosa, syn of Metastelma parviflorum
* O. ventensis, syn of Cynanchum ventensis
