68 COMMON CANADIAN WILD PLANTS. 



32. Lamp'sana. Flowers yellow, 8-12 in a head. Scales of the involucre 8, 



in a single row. Pappus notx-. St.cin slender. Heads small, in loose 

 panicles. 



33. Ciclio'riuin. Flowers bright blue, showy, Scales of the involucre in 2 



rows, the outer of 5 short scales, the inner of 8-10 scales. Pappus chaffy. 

 Heads sessile, 2 or 3 together. 



34. Lieon'todon. Flowers yellow. Involucre with bractlets at the base. 



Pappus of plumose bristles, these broader at the base. Heads borne on 

 branching scapes. Leaves radical. 



35. Hiera'cium. Flowers yellow. Scales of the involucre more or lesa 



imbricated. Pappus a single row of tawny hair-like rough bristles. 

 Heads corymbose. 



36. Nab'alus. Flowers yellowish- or greenish-white, often tinged with pur- 



ple; heads nodding. Involucre of 5-14 scales in a single row, with a 

 few bractlets below. Pappus copious, of brownish or yellowish rough 

 bristles. 



37. Tarax'acum. Flowers j-ellow, on slender naked hollow scapes. Achenes 



prolonged into a slender thread-like beak. Leaves all radical. (See 

 Part I., Chapter viii.) 



38. L,actu'ca. Flowers pale yellow or purplish. Florets few (about 20) in 



the head. Scales of the involucre in 2 or more rows of unequal length. 

 Achenes with long thread-form beaks, and a pappus of very soft white 

 bristles. Heads numerous, panicled. Tall smooth herbs with rnncinatc 

 leaves. 



39. Mulge'dium. Flowers chiefly blue. Structure of the heads and general 



aspect of the plant as in Lactuca, but the beak of the achenes short and 

 thick, and the pappus tawny. Heads in a dense panicle. 



40. Son'clms. Flowers pale yellow. Heads many-flowered, enlarging at 



the base. Achenia without beaks. Pappus very soft and white. Tall 

 glaucous herbs with spiny-toothed leaves. 



41. Tragopo'gon. Flowers yellow. Heads large. Involucre of about 12 



lanceolate rather fleshy scales in one row, somewhat united at the base. 

 Achenes with long tapering beaks. Pappus of plumose bristles, 5 of 

 these longer and naked at the summit. Leaves entire, straight-veined, 

 clasping. 



1. CIR'SIUM, Tourn. COMMON THISTLE. 



1. C. lanceola'tum, Scop. (Cnicus lanceolatus, Hoffm., in 

 Macoun's Catalogue.) (COMMON THISTLE.) All the scales of the 



involucre priclcl ij -pointed. Leaves decurrent, pinnatifid, the lobes 

 prinkly-pointed, rough above, woolly with webby hairs beneath. 

 Fields and roadsides everywhere. 



