The numerous flowers are arranged in a more or less dense and long spikes.

The plant blooms in large, dense, head-like spikes of many flowers.

The very fragrant pale yellow and red flowers are held in dense spikes above the foliage.

The flowers are arranged in a dense spike or raceme.

They are tall herbs having coarse leaves, and large flowers in dense spikes.

They have dense spikes of flowers which sometimes curve.

The flowers are pale green, produced in dense terminal spikes.

The flowers are pale blue or violet, produced in a dense spike 15-30 cm long.

The inflorescence is a dense spike of many small yellow-green flowers.

The flowers are small, with five petals, and borne in dense spikes.