GAMOPETAL^ 177 



stigma projects beyond the unequal anthers, and 

 pollen is deposited by the anthers on the insect's 

 back. The flowers are mainly adapted to bees. In 

 Salvia there is a lever mechanism. Some plants 

 are gynodioecious. In Woodsage the floral members 

 move in relation to pollination of the flower. 



The fruits are dispersed by the bladdery calyx in 

 some cases, in others hooks serve to disperse them. 

 A few plants have hygroscopic stalks. 



The group is important from the large number of 

 plants, such as Sage, Thyme, Balm, etc., that yield 

 volatile oils. Perfumes are derived from them, e.g. 

 Lavender. 



Five tribes are recognised by Bentham and Hooker, 

 Satureineas with flat corolla-lobes, or with bent-back 

 margins, two to four distant stamens, spreading or 

 meeting under the upper lip, contiguous or confluent 

 anthers, and free, smooth nutlets, including Menthay 

 LycoptiSj Origanum, Thymus, Calamintha, Melissa. 

 The second tribe, Monardeae, includes those plants, 

 such as Salvia with two stamens, erect or ascending, 

 one-celled anthers (or with two distant cells), free, 

 smooth nutlets. In the Nepeteae there are four 

 stamens, two upper longer, ascending or spreading, 

 two anther-cells parallel, smooth or tubercled nutlets, 

 as Nepeta. In the Stachydeae there are four stamens, 

 parallel, the two upper shorter, ascending under the 

 concave upper lip, or included in the tube. The 

 nutlets are free, smooth or tubercled. This includes 

 Brunella, Scutellaria, Melittis, Marrubium, Stachys, 



VOL. III. 12 



