Flint corn, is the same species as, but a different variant of maize

Maize

Maize known in many English-speaking countries as corn or mielie/mealie, is a grain domesticated by indigenous peoples in Mesoamerica in prehistoric times. The leafy stalk produces ears which contain seeds called kernels. Though technically a grain, maize kernels are used in cooking as a vegetable...

 (var. Linnaeus). Because each kernel has a hard outer layer to protect the soft endosperm

Endosperm

Endosperm is the tissue produced inside the seeds of most flowering plants around the time of fertilization. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. This makes endosperm an important source of nutrition in human diet...

, it is likened to being hard as flint

Flint

Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz, categorized as a variety of chert. It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones. Inside the nodule, flint is usually dark grey, black, green, white, or brown in colour, and...

; hence the name.

With less soft starch than dent corn (Zea mays indentata), it is too hard to bear concavities ("indentations"). This is one of the three types of corn cultivated by Native Americans

Indigenous peoples of the Americas

The indigenous peoples of the Americas are the pre-Columbian inhabitants of North and South America, their descendants and other ethnic groups who are identified with those peoples. Indigenous peoples are known in Canada as Aboriginal peoples, and in the United States as Native Americans...

, both in New England and across the northern tier, including by tribes such as the Pawnee on the Great Plains

Great Plains

The Great Plains are a broad expanse of flat land, much of it covered in prairie, steppe and grassland, which lies west of the Mississippi River and east of the Rocky Mountains in the United States and Canada. This area covers parts of the U.S...

. Archeologists have found evidence of such corn cultivation by the Pawnee and others since at least 1250 AD

Common Era

Common Era ,abbreviated as CE, is an alternative designation for the calendar era originally introduced by Dionysius Exiguus in the 6th century, traditionally identified with Anno Domini .Dates before the year 1 CE are indicated by the usage of BCE, short for Before the Common Era Common Era...

. Cultivation of corn occurred hundreds of years earlier among the Mississippian culture

Mississippian culture

The Mississippian culture was a mound-building Native American culture that flourished in what is now the Midwestern, Eastern, and Southeastern United States from approximately 800 CE to 1500 CE, varying regionally....

 people, whose civilization arose based on population density and trade because of surplus corn crops.

Distinctive traits

Because flint corn has a very low water content it is more resistant to freezing than other vegetables. It was the only Vermont

Vermont

Vermont is a state in the New England region of the northeastern United States of America. The state ranks 43rd in land area, , and 45th in total area. Its population according to the 2010 census, 630,337, is the second smallest in the country, larger only than Wyoming. It is the only New England...

 crop to survive New England

New England

New England is a region in the northeastern corner of the United States consisting of the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut...

's infamous "Year Without a Summer

Year Without a Summer

The Year Without a Summer was 1816, in which severe summer climate abnormalities caused average global temperatures to decrease by about 0.4–0.7 °C , resulting in major food shortages across the Northern Hemisphere...

" of 1816.

Coloration

Flint corn has different colors, and it is natural for corn. Single-coloured varieties are bred by human. Like the Linnaeus variant of maize, any kernel may contain the yellow pigment zeaxanthin

Zeaxanthin

Zeaxanthin is one of the most common carotenoid alcohols found in nature. It is important in the xanthophyll cycle. Synthesized in plants & some micro-organisms, it is the pigment that gives paprika , corn, saffron, and many other plants & microbes their characteristic color.The name is derived...

 but at more varying concentrations.

Uses

Popcorn

Popcorn

Popcorn, or popping corn, is corn which expands from the kernel and puffs up when heated. Corn is able to pop because, like sorghum, quinoa and millet, its kernels have a hard moisture-sealed hull and a dense starchy interior. This allows pressure to build inside the kernel until an explosive...

 (Zea mays everta, "corn turned inside out") is considered a variant of this type. It has a hard, slightly translucent kernel.

Flint corn is also the type of corn preferred for making hominy

Hominy

Hominy or nixtamal is dried maize kernels which have been treated with an alkali in a process called nixtamalization.The English term hominy is derived from the Powhatan language word for maize. Many other Native American cultures also made hominy and integrated it into their diet...

, a staple food in the Americas since pre-Columbian

Pre-Columbian

The pre-Columbian era incorporates all period subdivisions in the history and prehistory of the Americas before the appearance of significant European influences on the American continents, spanning the time of the original settlement in the Upper Paleolithic period to European colonization during...

 times.

The flintcorn cultivars that have large proportions of kernels with hue

Hue

Hue is one of the main properties of a color, defined technically , as "the degree to which a stimulus can be describedas similar to or different from stimuli that are described as red, green, blue, and yellow,"...

s outside the yellow

Yellow

Yellow is the color evoked by light that stimulates both the L and M cone cells of the retina about equally, with no significant stimulation of the S cone cells. Light with a wavelength of 570–590 nm is yellow, as is light with a suitable mixture of red and green...

 range are primarily used ornamentally

Ornamental plant

Ornamental plants are plants that are grown for decorative purposes in gardens and landscape design projects, as house plants, for cut flowers and specimen display...

, notably as part of Thanksgiving

Thanksgiving

Thanksgiving Day is a holiday celebrated primarily in the United States and Canada. Thanksgiving is celebrated each year on the second Monday of October in Canada and on the fourth Thursday of November in the United States. In Canada, Thanksgiving falls on the same day as Columbus Day in the...

decorations in the United States. They are often called either "ornamental corn" or "Indian corn", although each of those names has other meanings as well.