4. Verticillaster. Dead nettle.
II. Flower.—Drawings (coloured alike throughout) to show hypogynous, perigynous and epigynous flower.
Calyx—Spurred, larkspur; galeate, monkshood.
Corolla—Papilionaceous, sweet-pea; bilabiate, dead nettle; rotate, convolvulus; cruciform, wall-flower.
Andrœcium—Diadelphous, sweet-pea; monadelphous, mallow; didynamous, dead nettle; tetradynamous, wall-flower. Attachment of anthers—drawings.
Ovaries—Diagram of monocarpellary and unilocular, tricarpellary and unilocular, polycarpellary and unilocular, polycarpellary and multilocular; free central.
Ovules—Drawing of orthotropous, anatropous and campylotropous—each part of the ovule coloured the same throughout.
Fertilisation.
The two forms of primrose to show heterostylism.
Drawing of figwort to show protogyny.