466 233. SDlidago. 39. COMPOSITi£, C. Pl.e.T.caL 



E. Lapponica. Stem simple, straiglit ; root leaves petioled, 

 petioles bordered ; upper leaves lanceolate ; calathides 

 spiked. 



Solidago Lapponica, With. Bot. Arr. ed. 5,89T. 



LIX. 234-. ERIGERON. Theophrastus. Erlgeron, 



' Periclvne ovate ; scales imbricate, unequal, linear, lan- 

 ceolate, becoming deflected, edges membranaceous; cala- 

 thides radiated ; flmuers all fertile ; of the centre tubular, 

 hermaphrodite, yellow ; of the rays numerous, in a single 

 row, female; ligulse very slender, blue or white; clinantlnis 

 convex, pitted, rough ; akenium angular, silky; pappus. 

 hairlike, rough. — Herl rough; calathides panicled. 



E^'igeron Canadense. Canada erigeron. 



Stem hirtous, panicled ; leaves lanceolate, fringed ; lower 

 leaves toothed. 



Conj'za Canadensis annua, acris, alba, linarise foliis. Rait Syn. 175, 1. 

 Erigeron Canadense, Lin. S. P. 1210. 

 Canada Jleabane, White golden rod. 



Cultivated places ; annual ; August to September ; natu- 

 ralized. 



Stem upright, firm; leaves pointed; calathides small. 

 — Fibre has been made into excellent paper. 



LX. 235. TRIMORPHA. Cassine. Trlmorphe. 



Pericline ovate; scales imbi'icate, lanceolate, awlshapc, 

 acute ; calathides radiated ; fiowers all fertile ; of the centre 

 tubular, 5-cut, hermaphrodite, yellow ; of the rays female, 

 in two rows ; inner row tubular, 5-cut ; outer row ligulate, 

 very numerous ; ligulae linear, blue or white ; clinanthus 

 flat, pitted; ahenium compressed, hispid; pappus hairlike, 

 longer than the akenium. 



1. Trimorpha acre. Sharp trimorphe. 



Stem racemose; peduncles alternate, 1 -flowered; leaves 

 lanceolate, ligulate, sessile; pappus reddish, twice as long 

 as the akenium. 



Aster arvensis cjEruleus acris, Rati Syn. 175, 3. 

 Conyza csernlea acris, Ger. em. 484, 10. 

 Conyza odorata caeriilea, Park. 126. 

 Erigeron acre, Lin. S, P. 1211. 

 Blue Jleabane. 



Chalky hills; perennial; July and August. 



