| 词条 | Trifolium macraei |
| 释义 |
|image = Trifoliummacraei.jpg |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Rosids |ordo = Fabales |familia = Fabaceae |subfamilia = Faboideae |tribus = Trifolieae |genus = Trifolium |species = T. macraei |binomial = Trifolium macraei |binomial_authority = Hook. & Arn. |}} Trifolium macraei is a species of clover known by the common names Chilean clover,[1] double-head clover, and MacRae's clover. It has a disjunct distribution, occurring on the coastline of Oregon and California in the United States, as well as in South America.[2] It grows in coastal habitat, such as sand dunes, and disturbed areas. It is an annual herb taking a decumbent or erect form. The leaves are made up of oval leaflets 1 to 2 centimeters in length. The inflorescence is usually made up of two oval or rounded heads of flowers each measuring up to 1.5 centimeters wide. Each flower has a calyx of sepals which taper into densely hairy bristles. The flower corolla is purple or bicolored with white or pink. References1. ^{{PLANTS|id=TRMA2|taxon=Trifolium macraei|accessdate=15 December 2015}} 2. ^Knapp, E. E. and P. G. Connors. (1999). Genetic consequences of a single-founder population bottleneck in Trifolium amoenum (Fabaceae). American Journal of Botany 86 124-30. External links
8 : Trifolium|Flora of California|Flora of Chile|Flora of Oregon|Natural history of the California chaparral and woodlands|Natural history of the California Coast Ranges|Natural history of the Channel Islands of California|Natural history of the San Francisco Bay Area |
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