| 词条 | Euphorbia deltoidea |
| 释义 |
|image = Euphorbia deltoidea deltoidea.jpg |image_caption = subsp. deltoidea |genus = Euphorbia |species = deltoidea |authority = Engelm. ex Chapm. 1883 |synonyms_ref = [1] |synonyms ={{collapsible list|bullets = true |Chamaesyce deltoidea (Engelm. ex Chapm.) Small |Chamaesyce deltoidea subsp. serpyllum (Small) D.G.Burch |Chamaesyce serpyllum Small |Euphorbia deltoidea var. serpyllum (Small) Oudejans |Chamaesyce adhaerens Small |Chamaesyce deltoidea var. adhaerens (Small) D.G.Burch |Chamaesyce deltoidea subsp. adhaerens (Small) A.Herndon |Euphorbia deltoidea var. adhaerens (Small) Oudejans |Chamaesyce deltoidea subsp. pinetorum (Small) A.Herndon |Chamaesyce pinetorum Small |Euphorbia pinetorum G.L.Webster |Euphorbia smallii Oudejans |}}}}Euphorbia deltoidea (syn. Chamaesyce deltoidea)[2] is a species of flowering plant endemic to Florida in the United States.[3] The taxonomy of the plant is difficult, with some authorities dividing it into four subspecies and some into three; also, it is frequently listed as a member of the old genus Chamaesyce.[3][4] One subspecies, ssp. deltoidea, is a federally listed endangered species called deltoid spurge.[4] It is found only in Miami-Dade County.[3] Another subspecies, ssp. adhaerens, is often included with it under the name deltoidea instead of separately, making it difficult to keep count of how many endangered plants there are.[4] This is generally dealt with by placing the "endangered species" label on any taxon within the species that is limited to Miami-Dade County, however many names they may have.[3] The deltoid spurge grows in a heavily populated county which has been overtaken by urban development. About 98% of the plant's natural habitat has been drastically altered or destroyed, causing its rarity.[3] The plant grows in South Florida's pine rocklands, an increasingly rare type of forest habitat that is stabilized by periodic wildfire.[5] The plant grows in open, sunny areas and depends on fires to clear away brush and litter that threaten to shade it out.[3] Fire suppression in Miami-Dade prevents this natural fire regime.[3] Other threats to the species include invasive plant species such as Burma reed (Neyraudia reynaudiana).[3] References1. ^The Plant List, Euphorbia deltoidea Engelm. ex Chapm. 2. ^{{GRIN | accessdate = 19 January 2018}} 3. ^1 2 3 4 5 6 7 USFWS. Deltoid Spurge. Multispecies Recovery Plan for South Florida. May 18, 1999. 4. ^1 2 USFWS. Deltoid Spurge Five Year Review. June 15, 2010. 5. ^{{WWF ecoregion|id=nt0164|name=South Florida Rocklands}} World Wildlife Fund Report. External links
4 : Euphorbia|Endemic flora of Florida|Endangered flora of the United States|Plants described in 1883 |
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