Agave longiflora

{{short description|Species of plant}}

{{Speciesbox

|image =Addisonia (PLATE 244) - colored illustrations and popular descriptions of plants (1916-(1964)) (16150476494).jpg

|status = G2

|status_system = TNC

|status_ref = {{cite web |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.152287/Manfreda_longiflora |title=Manfreda longiflora - (Rose) Verhoek-Williams St. Joseph's Staff |work=NatureServe Explorer |publisher=NatureServe |access-date=2011-12-09 }}

|genus = Agave

|species = longiflora

|authority = (Rose) G.D.Rowley

|synonyms =

Manfreda longiflora (Rose)Verh.-Will.

Polianthes runyonii Shinners

Runyonia longiflora Rose

|synonyms_ref =

}}

Agave longiflora (synonym Manfreda longiflora) is a species of flowering plant in the family Asparagaceae that is native to the Lower Rio Grande Valley of Texas in the United States and northern Tamaulipas in Mexico. Common names include amole de río, longflower tuberose, and Runyon's huaco.{{ITIS |id=503683 |taxon=Manfreda longiflora |accessdate=2011-12-09}} The type specimens were sent by botanist and photographer Robert Runyon (1881–1968) to the New York Botanical Garden in 1921. Consequently, the species was initially placed in a monotypic genus named in his honour, Runyonia, by Joseph Nelson Rose.{{cite journal |url=http://www.agavaceae.com/botanik/pflanzen/botanzeige_scan_en.asp?gnr=110&scan=7660&cat=4&name=Runyonia%20longiflora |title=Runyonia longiflora |journal=Addisonia |publisher=New York Botanical Garden |volume=7 |year=1922 |pages=39–40 |access-date=2011-12-09 |archive-url=https://web.archive.org/web/20120426041657/http://www.agavaceae.com/botanik/pflanzen/botanzeige_scan_en.asp?gnr=110&scan=7660&cat=4&name=Runyonia%20longiflora |archive-date=2012-04-26 |url-status=dead }} The species has been placed in the genus Manfreda, now absorbed into Agave. A. longiflora is a rhizomatous perennial with 3–7 prostrate leaves in a basal rosette.{{cite book |url=https://books.google.com/books?id=pM-UVgc-BDkC |title=Rare Plants of Texas: a Field Guide |first=Jackie M. |last=Poole |author2=William R. Carr |author3=Dana M. Price |author4=Jason R. Singhurst |publisher=Texas A&M University Press |year=2007 |isbn=978-1-58544-557-8 |pages=304–305}} It inhabits hills, terraces and slopes in the semi-arid Tamaulipan mezquital.{{cite web |url=http://www.centerforplantconservation.org/Collection/CPC_ViewProfile.asp?CPCNum=3563 |title=Manfreda longiflora |work=CPC National Collection Plant Profile |publisher=Center for Plant Conservation |date=2010-09-28 |access-date=2011-12-09 |archive-url=https://web.archive.org/web/20111026055837/http://www.centerforplantconservation.org/Collection/CPC_ViewProfile.asp?CPCNum=3563 |archive-date=2011-10-26 |url-status=dead }}