''Leucanthemum maximum'' is a species of flowering plant in the aster family known by the common name max chrysanthemum.

Range

It is native to

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...

and

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

but it can be found growing wild in other parts of the world as an

introduced species An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distributional range, but which has arrived ther ...

and sometimes a garden escapee.

Description

It is a

rhizomatous In botany and dendrology, a rhizome (; , ) is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow ho ...

perennial herb growing 30 to 70 centimeters tall with many large serrated leaves around the base of the stem on winged petioles. There are smaller lance-shaped leaves alternately arranged along the stem. 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 generally a large, solitary

flower head A pseudanthium (Greek for "false flower"; ) is an inflorescence that resembles a flower. The word is sometimes used for other structures that are neither a true flower nor a true inflorescence. Examples of pseudanthia include flower heads, compos ...

which may exceed 8 centimeters in diameter. It has a fringe of 20 to 30 white ray florets around a center of many densely packed yellow disc florets. The fruit is a small ribbed achene without a pappus.

Taxonomy

This species is one of the wild chrysanthemums

Luther Burbank Luther Burbank (March 7, 1849 – April 11, 1926) was an American botanist, horticulturist and pioneer in agricultural science. He developed more than 800 strains and varieties of plants over his 55-year career. Burbank's varied creations inc ...

crossed to produce the popular garden

hybrid Hybrid may refer to: Science * Hybrid (biology), an offspring resulting from cross-breeding ** Hybrid grape, grape varieties produced by cross-breeding two ''Vitis'' species ** Hybridity, the property of a hybrid plant which is a union of two dif ...

known as the Shasta daisy, ''Leucanthemum'' × ''superbum''.Chicago Botanic Garden
Chicago Botanic Garden evaluates Shasta daisy
Press Release. January 15, 2007.

References

External links

USDA Plants Profile
*
Photo gallery

maximum In mathematical analysis, the maxima and minima (the respective plurals of maximum and minimum) of a function, known collectively as extrema (the plural of extremum), are the largest and smallest value of the function, either within a given r ...

Plants described in 1800 {{Anthemideae-stub