''Trifolium macraei'' is a species of

clover Clover or trefoil are common names for plants of the genus ''Trifolium'' (from Latin ''tres'' 'three' + ''folium'' 'leaf'), consisting of about 300 species of flowering plants in the legume or pea family Fabaceae originating in Europe. The genus ...

known by the common names Chilean clover, double-head clover, and MacRae's clover. It has a disjunct distribution, occurring on the coastline of

Oregon Oregon () is a state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idaho. T ...

and

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

in the United States, as well as in South America.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. 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 An inflorescence is a group or cluster of flowers arranged on a Plant stem, stem that is composed of a main branch or a complicated arrangement of branches. Morphology (biology), Morphologically, it is the modified part of the shoot of sperma ...

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

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coine ...

s which taper into densely hairy bristles. The flower corolla is purple or bicolored with white or pink.

References

External links

Calflora Database: ''Trifolium macraei'' (Macrae's clover, Chilean clover)Jepson Manual eFlora (TJM2) treatment of ''Trifolium macraei''
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UC CalPhotos gallery: ''Trifolium macraei''
macraei 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 Flora without expected TNC conservation status {{Trifolieae-stub