Composite? A chillea. 2 5 i 



fifty, dispersed over Europe, temperate Asia, and North America. 

 The name is of classical origin. 



1. A. Millefdlium. Yarrow. The pink- or purple-flowered 

 varieties of this common weed are equally effective with any of 

 the other species and of long duration. The leaves are tri- 

 pinnately divided into numerous linear segments and the 

 flowers usually white. 



2. A. filipendulina (fig. 138). This is very near the pre- 

 ceding but rather taller and having less finely-cut leaves, and 

 pretty bright yellow flowers. 



A. jEgyptiaca and A. tomentosa are dwarf tufted species with 

 finely- cut cottony leaves and yellow flowers. 



3. A. Ptdrmica. Sneezewort. The only other native 

 species. The leaves are simple and serrulate, the ray-florets 

 larger, and the flower-heads larger and less numerous. There 

 is a double white variety of this worthy of cultivation. 



4. A. Clavennce. A dwarf species belonging to the same 

 group as the last. It grows about 6 inches, and is densely 

 clothed with a white hoary tomentum. Leaves bipinnatifid. 

 Segments broader than in the other species enumerated. 



26. SANTOLINA. 



Small evergreen shrubs with solitary spherical rayless flower- 

 heads on long peduncles. Achenes terete, destitute of pappus. 

 Corolla-tube with a hood-like appendage on the base. The 

 species are all natives of the Mediterranean region. The name 

 is combinative of sanctus, holy, and linum, flax, in allusion to 

 the reputed medicinal properties of some species. 



1. S. Chamce-cyparissus. Cotton Lavender. A dwarf densely- 

 branched shrub clothed with a close hoary pubescence. Leaves 

 alternate, dense, linear, with 4 or 6 rows of short obtuse teeth 

 projecting in all directions. Flower-heads yellow, on peduncles 

 from 6 to 12 inches long. There are several varieties under 

 different names, as incana, squarrosa, etc. 



5. alplna is a prostrate species with deepty-cut leaves and 

 erect flower-stalks. 



Lasthenia glabrata is a showy hardy annual from California. 

 Leaves linear, opposite. Flowers yellow. 



27. CHRYSANTHEMUM (Pyrethrum'). 



Annual or perennial herbs, rarely frutescent. Leaves various. 

 Involucral bracts many, imbricated, scarious on the margin. 



