Notes on the Flowers and Distribution of the Caribbean islands endemic Ipomoea sphenophylla (Convolvulaceae)


The original description of Ipomoea sphenophylla by Urban in 1908, based upon a fruiting specimen, did not include a description of the flowers. The holotype was subsequently lost and plants in flower were recol- lected in 1994; a neotype was then designated by Howard and McDonald in 1995. An amended description of the species was also supplied, detailing the characteristics of the cotyledons, a swollen root system, and dimorphic flowers. The flowers were described as including a more common morph with a normal funnelform corolla, and an abnormal morph having a 3–5 polypetalous corolla. Presently, both morphs occur together on one sterile indi- vidual that is located in the area where the neotype was collected. We have examined approximately 150 addi- tional plants, and all contain funnelform flowers. The polypetalous morphology is therefore atypical of Ipomoea sphenophylla. The species description is emended and the reference to polypetalous flowers is removed. 

Data type
Scientific article
Research and monitoring
Geographic location
St. Eustatius