66 COMMON CANADIAN WILD PLANTS. 



+- -i- All the florets in the head perfect. 



11. Antenna'ria, with dioecious heads, may be looked for here. See previous 



paragraph. 



liiI'iis. One or two species have no rays. See No. 25. 

 Seiie'cio. One species is without rays. See No. 14. 



12. Liia'tris. Flowers handsome, rose-purple. Receptacle naked. Pappus 



of long and slender bristles, plumose or rough. Achenes slender, 10 

 ribbed. Lobes of the corolla slender. Stem wand-like, leafy Leaves 

 narrow or grass-Hid'. 



13. Kupato'rium. Flowers white or purple. Receptacle naked. Pappus 



of slender hair-like bristles, smooth or nearly so. Achenes 5-angled. 

 Heads in corymbs. Leaves whorled, or connate, or opposite. 



I?. Rays or strap-shaped corollas round the margin of the head. 



* Pappus of hair-like bristles. Receptacle naked. 



14. Seiie'cio. Rays yellow, or in one species none. Scales of the involucre 



in a single row, or with a few bractlets at the base. Pappus very fine 

 and soft. Heads corymbose. Leaves alternate. 



15. In'ula. Rays yellow, numerous, very narrow, in a single row. Outer 



scales of the involucre leaf-like. Anthers with two tails at the base. 

 Stout plants, with large alternate leaves which are woolly beneath. 



16. Solida'go. Rays yellow, few, as are also the disk-florets. Involucre 



oblong, scales of unequal lengths, appressed. Achenes many-ribbed. 

 Heads small, in compound racemes, or corymbs. St. m.s usually wand- 

 like. Leaves alternate. 



17. Nardos'mia. Rays whitish or purplish. Heads in a corymb, fragrant. 



Scales of the involucre in a single row. Heads somewhat dioecious, the 

 staminate with one row of pistillate ray-flowers, the pistillate with ray- 

 flowers in many rows. Woolly herbx, with large leaves, all radical, and 

 sheathing scaly bracts on the scape-. 



is. Aster. Rays white, purple, or blue, never ii<il<nr, but the tils!,- generally 

 yellow. Pappus a; yinylerowut numerous line roughish bristles. Achenes 

 flattish. Heads corymbed or racemose. Flowering in late sumimT. 



10. KrigVron. I lavs and disk as in Aster, but the rays very narroi.-, nnd 

 UNiiiilli/ in iiKii-i" Hutu, on* row. Scales of the involucre in one or two 

 rows, nearly of equal length. Pappus <>f long bristles iritli x/u-/. 

 intermixed. Heads corymbed or solitary. Leaves generally sessile. 



tiO. Jliplopap'pus. Rays white, long. Disk-tlorets yellow. Scales . t \\\>- 

 involucre 1-ncrvcd. I'ajynta dubl , the outer row of short still bustles. 

 Heads small, corymbed. 



