Biology:Manihot walkerae: Difference between revisions
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{{Short description|Species of flowering plant}} | {{Short description|Species of flowering plant}} | ||
{{Speciesbox | {{Speciesbox | ||
|image = Manihot walkerae.jpg | | image = Manihot walkerae.jpg | ||
|status = G1 | | image2 = Walker's manioc (Manihot walkerae) 1.jpg | ||
| | | status = EN | ||
| | | status_system = IUCN3.1 | ||
|genus = Manihot | | status_ref = <ref name=iucn>{{cite iucn |author=Vera Sanchez, K.S. |author2=Nassar, N. |year=2019 |title=''Manihot walkerae'' |volume=2019 |page=e.T20755842A20756066 |doi=10.2305/IUCN.UK.2019-2.RLTS.T20755842A20756066.en |access-date=9 May 2024}}</ref> | ||
|species = walkerae | | status2 = G1 | ||
|authority = Croizat<ref name="GRIN">{{GRIN | accessdate=2011-05-07}}</ref> | | status2_system = TNC | ||
| status2_ref = <ref name="TNC">{{cite web |url=http://www.natureserve.org/explorer/servlet/NatureServe?sourceTemplate=tabular_report.wmt&loadTemplate=species_RptComprehensive.wmt&selectedReport=RptComprehensive.wmt&summaryView=tabular_report.wmt&elKey=160439&paging=home&save=true&startIndex=1&nextStartIndex=1&reset=false&offPageSelectedElKey=160439&offPageSelectedElType=species&offPageYesNo=true&post_processes=&radiobutton=radiobutton&selectedIndexes=160439 |title=''Manihot walkerae'' - Croizat Walker's Manihot |work=NatureServe Explorer |publisher=NatureServe |accessdate=2011-05-07}}</ref> | |||
| genus = Manihot | |||
| species = walkerae | |||
| authority = Croizat<ref name="GRIN">{{GRIN | accessdate=2011-05-07}}</ref> | |||
| range_map = Walker's manihot (Manihot walkerae) IUCN range 2017.svg | |||
}} | }} | ||
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==Distribution and habitat== | ==Distribution and habitat== | ||
Walker's manihot is native to the Lower Rio Grande Valley of | [[File:Walker's manioc (Manihot walkerae) 4.jpg|left|thumb]] | ||
Walker's manihot is native to the Lower Rio Grande Valley of Texas in the [[United States]] and Tamaulipas in Mexico. | |||
It generally grows under the branches of larger shrubs and trees. In Texas, this species inhabits xeric slopes and uplands in thorny shrublands. Soils are shallow, [[Earth:Calcareous|calcareous]] sandy [[Earth:Loam|loam]]s, often derived from the [[Earth:Caliche|caliche]] and conglomerate of the Goliad Formation. Associated woody plants include ''Acacia rigidula'', ''Citharexylum brachyanthum'', ''[[Biology:Cylindropuntia leptocaulis|Cylindropuntia leptocaulis]]'', ''[[Biology:Karwinskia humboldtiana|Karwinskia humboldtiana]]'', ''[[Biology:Leucophyllum frutescens|Leucophyllum frutescens]]'', and ''[[Biology:Prosopis glandulosa|Prosopis glandulosa]]''. Walker's manihot has been collected from the Loreto caliche sand plain in Tamaulipas, where it grew alongside ''[[Biology:Asclepias prostrata|Asclepias prostrata]]'', ''[[Biology:Manfreda longiflora|Manfreda longiflora]]'', and ''[[Biology:Physaria thamnophila|Physaria thamnophila]]''.<ref name="Poole" /> | It generally grows under the branches of larger shrubs and trees. In Texas, this species inhabits xeric slopes and uplands in thorny shrublands. Soils are shallow, [[Earth:Calcareous|calcareous]] sandy [[Earth:Loam|loam]]s, often derived from the [[Earth:Caliche|caliche]] and conglomerate of the Goliad Formation. Associated woody plants include ''Acacia rigidula'', ''Citharexylum brachyanthum'', ''[[Biology:Cylindropuntia leptocaulis|Cylindropuntia leptocaulis]]'', ''[[Biology:Karwinskia humboldtiana|Karwinskia humboldtiana]]'', ''[[Biology:Leucophyllum frutescens|Leucophyllum frutescens]]'', and ''[[Biology:Prosopis glandulosa|Prosopis glandulosa]]''. Walker's manihot has been collected from the Loreto caliche sand plain in Tamaulipas, where it grew alongside ''[[Biology:Asclepias prostrata|Asclepias prostrata]]'', ''[[Biology:Manfreda longiflora|Manfreda longiflora]]'', and ''[[Biology:Physaria thamnophila|Physaria thamnophila]]''.<ref name="Poole" /> | ||
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==References== | ==References== | ||
{{Wikispecies}} | |||
{{Reflist}} | {{Reflist}} | ||
Latest revision as of 03:19, 13 April 2025
| Manihot walkerae | |
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Malpighiales |
| Family: | Euphorbiaceae |
| Genus: | Manihot |
| Species: | M. walkerae
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| Binomial name | |
| Manihot walkerae Croizat[3]
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_IUCN_range_2017.svg)
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Manihot walkerae, commonly known as Walker's manihot,[4] is a species of flowering plant in the spurge family, Euphorbiaceae, native to North America.
Description
Manihot walkerae is a perennial herb or small shrub[5] that reaches a height of up to 0.5 metres (1.6 feet).[6] The entire plant has an odor resembling hydrogen cyanide. Roots are carrot-shaped and tuberous, while stems are prostrate or ascending-erect. The peltate leaves are alternate, simple, glabrous, 5–14 centimetres (2–5 1⁄2 inches) long and 4–11 cm (1 1⁄2–4 1⁄2 in) wide. They are palmately lobed, with 3–5 pandurate to halberd-shaped lobes. The white flowers occur in androgynous, axillary, subspicate racemes. The fruit is a dehiscent capsule 10–12 millimetres (3⁄8–1⁄2 in) in length.[5]
Taxonomy
The specific name honours amateur botanist Thelma Ratcliff (Mrs. E. J.) Walker, who discovered the type specimen near Mission and La Joya, Texas in 1942.[7]
Distribution and habitat
_4.jpg)
Walker's manihot is native to the Lower Rio Grande Valley of Texas in the United States and Tamaulipas in Mexico.
It generally grows under the branches of larger shrubs and trees. In Texas, this species inhabits xeric slopes and uplands in thorny shrublands. Soils are shallow, calcareous sandy loams, often derived from the caliche and conglomerate of the Goliad Formation. Associated woody plants include Acacia rigidula, Citharexylum brachyanthum, Cylindropuntia leptocaulis, Karwinskia humboldtiana, Leucophyllum frutescens, and Prosopis glandulosa. Walker's manihot has been collected from the Loreto caliche sand plain in Tamaulipas, where it grew alongside Asclepias prostrata, Manfreda longiflora, and Physaria thamnophila.[5]
Conservation
Manihot walkerae was added to the U.S. endangered species list on 2 October 1991 and the Texas endangered species list on 30 March 1993.[5] NatureServe considers it critically imperiled, as the wild population is estimated to be less than 1,000 plants.[2] Protected populations occur in the Lower Rio Grande Valley National Wildlife Refuge, while cultivated specimens exist at the San Antonio Botanical Garden, the University of Texas at Austin,[8] and Santa Ana National Wildlife Refuge.[7]
Uses
Walker's manihott is a close relative of the widely cultivated cassava (M. esculenta) and has been studied for its role in introducing valuable traits into the latter.[8] The tubers of M. walkerae exhibit dramatically delayed postharvest physiological deterioration. This trait can be passed to M. esculenta × M. walkerae hybrids,[9] allowing the roots to remain intact one month after harvest.[10]
References
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Wikispecies has information related to Manihot walkerae |
- ↑ Vera Sanchez, K.S.; Nassar, N. (2019). "Manihot walkerae". IUCN Red List of Threatened Species 2019: e.T20755842A20756066. doi:10.2305/IUCN.UK.2019-2.RLTS.T20755842A20756066.en. https://www.iucnredlist.org/species/20755842/20756066. Retrieved 9 May 2024.
- ↑ 2.0 2.1 "Manihot walkerae - Croizat Walker's Manihot". NatureServe Explorer. NatureServe. http://www.natureserve.org/explorer/servlet/NatureServe?sourceTemplate=tabular_report.wmt&loadTemplate=species_RptComprehensive.wmt&selectedReport=RptComprehensive.wmt&summaryView=tabular_report.wmt&elKey=160439&paging=home&save=true&startIndex=1&nextStartIndex=1&reset=false&offPageSelectedElKey=160439&offPageSelectedElType=species&offPageYesNo=true&post_processes=&radiobutton=radiobutton&selectedIndexes=160439. Retrieved 2011-05-07.
- ↑ {{citation | mode = cs1 | title = Manihot walkerae | work = Germplasm Resources Information Network (GRIN) | url = | publisher = [[Organization:Agricultural Research ServAgricultural Research Service (ARS), United States Department of Agriculture (USDA) | access-date = 2011-05-07 }}
- ↑ "Manihot walkerae". Integrated Taxonomic Information System. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=28350. Retrieved 2011-05-07.
- ↑ 5.0 5.1 5.2 5.3 Poole, Jackie M.; William R. Carr; Dana M. Price; Jason R. Singhurst (2007). Rare Plants of Texas: a Field Guide. Texas A&M University Press. pp. 306–307. ISBN 978-1-58544-557-8. https://books.google.com/books?id=pM-UVgc-BDkC.
- ↑ Everitt, J. H.; Dale Lynn Drawe; Robert I. Lonard (2002). Trees, Shrubs, and Cacti of South Texas. Texas Tech University Press. p. 218. ISBN 978-0-89672-473-0. https://books.google.com/books?id=8cEq7weUPYYC.
- ↑ 7.0 7.1 Mild, Christina (2003). "Manihot walkerae". Rio Delta Wild. http://www.riodeltawild.com/janjune2003/Manihot%20walkerae.pdf. Retrieved 2011-05-07.
- ↑ 8.0 8.1 Barrett, Cindy (2010-03-04). "Manihot walkerae". CPC National Collection Plant Profiles. Center for Plant Conservation. http://www.centerforplantconservation.org/collection/cpc_viewprofile.asp?CPCNum=2798. Retrieved 2011-05-07.
- ↑ Ceballos, Hernán; Okogbenin, Emmanuel; Pérez, Juan Carlos; Becerra López-Valle, Luis Augusto; Debouck, Daniel (2010). "Cassava". Root and Tuber Crops. Handbook of Plant Breeding. 7. Springer. pp. 53–96. doi:10.1007/978-0-387-92765-7_2. ISBN 9780387927640. ISBN:9780387927657.
- ↑ Lokko, Y.; E. Okogbenin; C. Mba; A. Dixon; A. Raji; M. Fregene (2007). "Cassava". Pulses, Sugar and Tuber Crops. Genome Mapping and Molecular Breeding in Plants. 3. Springer. p. 263. doi:10.1007/978-3-540-34516-9_14. ISBN 9780387927657. https://books.google.com/books?id=kHE2nlLLCAAC.
Wikidata ☰ Q6749587 entry
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