A type of inflorescence in which the single-flowered pedicels are arranged along the sides of a flower shoot axis.
2.
Rachilla
The main axis of a flower (or leaf).
3.
Rachilla, rhachilla
A secondary rachis. In particular in grasses the axis that bears the floret.
4.
Rachis, rhachis (pl. rachides)
The main axis of an inflorescence.
5.
Radiation
The process by which radiant (electromagnetic) energy is transmitted through free space; the term used to describe electromagnetic energy, as in infrared radiation or shortwaves radiation.
6.
Radiation beam
The column of solar radiation flowing into or through the atmosphere.
7.
Radicle
The rudimentary root of the embryo, developing into the primary root after emergence through the seed coat during germination (see 'Primary root').
8.
Radicle
Rudimentary root or lower end of the hypocotyl of the embryo; it forms the primary root of the young plant.
9.
Radicle
Portion of the axis of an embryo from which the primary root develops.
10.
Radicle
The rudimentary root of the seed or seedling which forms the primary root of the young plant.
