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- stenocephala `The Rocket´. Flowers from July to August. Large triangular leaves with an irregular edge and spires of yellow flowers. Hardy. Prefers light shade, in rich moisture retaining soil.
- siphilitica. Flowers from August to October. Racemes of two lipped blue flowers above narrow, oval green leaves. Fully Hardy. Plant in ordinary moisture retaining soil.
- tupa. Flowers from July to October. Downy grey-green leaves and spikes of lipped, brick red flowers. Hardy. Prefers full sun, in rich moist but well drained soil.