Camptocarpus acuminatus
{{Short description|Species of flowering plant}}
{{speciesbox
|image = Camptocarpus acuminatus.jpg
|image_caption = Photograph of Camptocarpus acuminatus{{cite web |url= https://www.tropicos.org/name/50109739 |title= Camptocarpus acuminatus (Choux) Venter |author=Peter B. Phillipson |date=October 7, 2007 |website=Tropicos |publisher=Tropicos.org. Missouri Botanical Garden |access-date=July 20, 2023}}
|status = VU
|status_system = IUCN3.1
|genus= Camptocarpus
|species= acuminatus
|authority= (Choux) Venter
|synonyms={{species list
|Tanulepis acuminata|Choux}}
}}
Camptocarpus acuminatus is a species of plant in the Apocynaceae family. It is endemic to
the Madagascar.{{cite web
|url= https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:998073-1
|title= Camptocarpus acuminatus (Choux) Venter
|author=
|date=n.d.
|website=Plants of the World Online
|publisher=The Trustees of the Royal Botanic Gardens, Kew
|access-date=July 20, 2023}}
Pierre Choux,{{IPNI |id=1620-1|author=Pierre Choux |access-date=2023-07-16}} the botanist who first formally described the species, named it after the tapering ({{lang|la|acuminatus}} in Latin) tips of its leaves, using the synonymous name Tanulepis acuminata.{{cite book | last = Stearn | first = William | title = Botanical Latin | publisher = Timber Press David & Charles | location = Portland, Ore. Newton Abbot | year = 2004 | isbn = 9780881926279 }}{{cite journal |last1=Choux|first1=M.P. |date= 1914 |title= Le genre Tanulepis à Madagascar |trans-title= The genus Tanulepis in Madagascar |url= https://www.biodiversitylibrary.org/page/7158392#page/433 |language= fr |journal= Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences |volume= 158 |pages=423–425}}
Description
It is a woody climbing plant. The oval to disc-shaped leaves are 27–41 by 13–19 millimeters. Its leaves taper to a distinctive tip. Its petioles are 3–5 millimeters long. It has small flowers that are 2.4–2.5 millimeters long. Its 5 petals are fused at the base forming a tube. The flowers have a structure between the petals and the stamen called a corona. The base of the corona forms a ring that is fused with the base of the petals and the stamen. Its corona has 5 thread-like lobes that are radially aligned with the stamen. Its flowers have 5 stamen.
=Reproductive biology=
The pollen of Camptocarpus acuminatus is shed as permanent tetrads.{{cite journal |last1= Verhoeven |first1=Rudolf L. |last2=Venter |first2=Johan T. |date=2001 |title= Pollen Morphology of the Periplocoideae, Secamonoideae, and Asclepiadoideae (Apocynaceae) |jstor= 3298634 |journal= Annals of the Missouri Botanical Garden |volume=88 |issue=4 |pages=569–582|doi=10.2307/3298634 |url=https://www.biodiversitylibrary.org/part/38853 }}