DescriptionEB1911 Pollination - pollination of Salvia pratensis.jpg	English: Pollination of Salvia pratensis (see legend below).
Date	published 1911
Source	“Pollination,” Encyclopædia Britannica (11th ed.), v. 22, 1911, fig. 9, p. 4.
Author	From Strasburger's Lehrbuch der Botanik.
Permission (Reusing this file)	Public domainPublic domainfalsefalse This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

1, Flower visited by a humble-bee, showing the projection of the curved connective bearing the anther from the helmet-shaped upper lip and the deposition of the pollen on the back of the humble-bee.

2, Older flower, with connective drawn back, and elongated style.

3, The same, when disturbed by the entrance of the probosces of the bee in the direction of the arrow; f, filament; c, connective; s, the obstructing half of the anther.

4, The staminal apparatus at rest, with connective enclosed within the upper lip.