Two New Species Of Heteranthera (Pontederiaceae) In North America

This dataset contains the digitized treatments in Plazi based on the original journal article Horn, Charles N. (2020): Two New Species Of Heteranthera (Pontederiaceae) In North America. Journal of the Botanical Research Institute of Texas 14 (1): 1-8, DOI: 10.17348/jbrit.v14.i1.886, URL: doi.org/10.17348/jbrit.v14.i1.886 ABSTRACT Two new species are here described as segregates from Heteranthera multiflora. Heteranthera missouriensis sp.nov. has 5–13 flowers on an elongate floral axis, lavender to purplish flowers, a smaller perianth with the tube 3–5 mm long and lobes 3–4.5 mm long;it is common in the southern Great Plains of North America.

Heteranthera pauciflora sp. nov. has 3–6 flowers on a shortened floral axis, commonly enclosed by the subtending spathe, white to light lavender flowers with the tube 8–10 mm long; it is known from the Atlantic coast from New Jersey to North Carolina. A taxonomic key to all species of the genus in North America, and a modified description of Heteranthera multiflora, are provided.