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Rachis is also the alternate spelling of Ratchis
Ratchis

Ratchis was the Duke of Friuli and King of the Lombards . His father was Pemmo of Friuli. His Rome wife was Tassia. He ruled in peace until he besieged, for reasons unknown, Perugia....
, king of the Lombards, 744-749.
The rachis is the main axis of the inflorescence
Inflorescence

An inflorescence is a group or cluster of flowers arranged on a Plant stem that is composed of a main branch or a complicated arrangement of branches....
, or spike
Spike

Spike may refer to:...
, of wheat
Wheat

Wheat , is a worldwide cultivated Poaceae from the Levant region of the Middle East. Globally, after maize, wheat is the second most-produced food among the cereal just above rice....
 and other cereal
Cereal

Cereals, or cereal grains, are mostly Poaceae cultivated for their edible brans or fruit seeds . Cereal grains are grown in greater quantities and provide more energy worldwide than any other type of crop; they are therefore staple foods....
s, to which the spikelets are attached. It is also the part of the axis that the pinnae are attached to in fern
Fern

A fern is any one of a group of about 20,000 species of plants classified in the phylum or division Pteridophyta, also known as Filicophyta....
s, the main stem of a compound leaf
Leaf

In botany, a leaf is an above-ground plant Organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the cells containing chloroplast to light over a broad area, and to allow light to penetrate fully into the tissues....
 (such as in Acacia
Acacia

Acacia is a genus of shrubs and trees belonging to the subfamily Mimosoideae of the family Fabaceae, first described in Africa by the Sweden botanist Carolus Linnaeus in 1773....
), or the main axis in compound inflorescences in other angiosperms.

Spikelets are small inflorescences bearing one or more florets, or small flowers, along with a set of miniature bractlike leaves
Leaves

Leaves are an Iceland five-piece alternative rock band who formed in 2001. They came to prominence in 2002 with their debut album, Breathe, drawing comparisons to groups such as Coldplay and Doves....
.






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Rachis is also the alternate spelling of Ratchis
Ratchis

Ratchis was the Duke of Friuli and King of the Lombards . His father was Pemmo of Friuli. His Rome wife was Tassia. He ruled in peace until he besieged, for reasons unknown, Perugia....
, king of the Lombards, 744-749.
Usda Rachis Barley
The rachis is the main axis of the inflorescence
Inflorescence

An inflorescence is a group or cluster of flowers arranged on a Plant stem that is composed of a main branch or a complicated arrangement of branches....
, or spike
Spike

Spike may refer to:...
, of wheat
Wheat

Wheat , is a worldwide cultivated Poaceae from the Levant region of the Middle East. Globally, after maize, wheat is the second most-produced food among the cereal just above rice....
 and other cereal
Cereal

Cereals, or cereal grains, are mostly Poaceae cultivated for their edible brans or fruit seeds . Cereal grains are grown in greater quantities and provide more energy worldwide than any other type of crop; they are therefore staple foods....
s, to which the spikelets are attached. It is also the part of the axis that the pinnae are attached to in fern
Fern

A fern is any one of a group of about 20,000 species of plants classified in the phylum or division Pteridophyta, also known as Filicophyta....
s, the main stem of a compound leaf
Leaf

In botany, a leaf is an above-ground plant Organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the cells containing chloroplast to light over a broad area, and to allow light to penetrate fully into the tissues....
 (such as in Acacia
Acacia

Acacia is a genus of shrubs and trees belonging to the subfamily Mimosoideae of the family Fabaceae, first described in Africa by the Sweden botanist Carolus Linnaeus in 1773....
), or the main axis in compound inflorescences in other angiosperms.

Spikelets are small inflorescences bearing one or more florets, or small flowers, along with a set of miniature bractlike leaves
Leaves

Leaves are an Iceland five-piece alternative rock band who formed in 2001. They came to prominence in 2002 with their debut album, Breathe, drawing comparisons to groups such as Coldplay and Doves....
. When the fruits of the wild-type wheat are fully ripe
Ripe

Ripe may refer to:* Ripening, especially of fruit* RIPE, R?seaux IP Europ?ens* RIPE NCC, the Regional Internet Registry for Europe* Ripeness, a term in law...
ned, a series of abscission layers forms that divides the rachis into dispersal units consisting of a single spikelet attached to a short segment of the rachis. A ripe head of wheat is thus easily shattered into dispersal units when touched or blown by the wind
WIND

The Global Geospace Science WIND satellite is a NASA science spacecraft launched at 04:31:00 EST on November 1, 1994 from launch pad 17B at Cape Canaveral Air Force Station in Merritt_Island%2C_Florida, Florida aboard a McDonnell Douglas Delta II 7925-10 rocket....
. This is referred to by archaeologists as a "brittle rachis".

In animal anatomy, rachis is the series of articulated vertebrae, which encase the spinal cord
Spinal cord

The spinal cord is a long, thin, tubular bundle of neuron and glia that extends from the brain. The brain and spinal cord together make up the central nervous system....
 and forms the supporting axis of the body; the spine. This is also called vertebral column. In feather
Feather

Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, on birds. They are considered the most complex integumentary structures found in vertebrates....
s, rachis refers to the central shaft.