THE (lOURD FAMILY 383 



135. The mint family (Labiatae). Examples: sage 

 (Figs. 132, 133, ])age 138), thyme (Fig. 134, page 139), 

 spearmint (Fig. 135, page 139), summer savory (Fig. 136, 

 page 139), sweet marjoram (Fig. 137, page 140), and pepper- 

 mint (Figs. 146 I, II, pages 147, 148). 



The formulas of Mentha, Thymus, Origanum, Satureia, Salvia, 

 and Labiatse are given on pages 418, 419. 



When a gamopetalous corolla has the two upper petals 

 coalescing with one another more complete!}^ than they do 

 with those at the side, and the two lateral ones in turn more 

 completely coalescing with the lower petal, there results a 

 two-lipped or labiate ' form shown especially well in Salvia 

 and most other members of the family. It should be noted, 

 however, that more or less labiate corollas occur also in many 

 genera of the figwort family and some other families of the 

 group we are now studying. Typical members of the mint 

 family are easily recognized as square-stemmed, aromatic herbs 

 with opposite leaves, labiate corolla and schizocarpic fruit of 

 four nutlets. As in the figivort family the juice is watery, the 

 leaves exstipulate, the petals imbricate, and the stamens generally 

 four, but the seeds are exalbuminous and the embryo uncoiled. 



136. Phlox order (Polemoniales or Tubiflorae) , embraces a 

 number of families besides the four just mentioned. In 

 general they are characterized by having perfect, regular or 

 irregular, gamopetalous flowers, with two to five stamens ad- 

 herent to the corolla, and distinct; the anthers seldom poricidal; 

 the ovary compound and superior. 



For the formula of Polemoniales see pages 418, 419. 



137. The gourd family (Cucurbitaceae) . Examples : pump- 

 kin (Figs. 80 1-81 I, pages 76-78), squashes (Figs. 81 II- 

 84, pages 79-82), cucumber (Figs. 85-87, pages 82, 83), 

 muskmelon (Figs. 102, 103, page 95), watermelon (Figs. 

 104, 105, page 96), sponge cucumber (Fig. 225, page 240), 

 and bottle-gourd (Fig. 265, page 275). 



See pages 418, 419 for the formulas of Cucurbita, Cucumis, 

 Citrullus, Lagenaria, Luffa, and Cucurbitaceie. 



^ La'bi-ate < L. labium, lip. P5). • 



