466 238. SoKdago. 39. COMPOSITE, C. Pt.ex.cah 
e. Lapponica. Stem simple, straight; root leaves petioled, 
petioles bordered ; upper leaves lanceolate ; calathides 
spiked. 
Solidago Lapponica, With. Bot. Arr. ed. 5,S9T. 
LIX. 234. ERIGERON. Theophrastus. Erigeron . 
Pericline ovate; scales imbricate, unequal, linear, lan- 
ceolate, becoming deflected, edges membranaceous; cala - 
thides radiated ; flowers all fertile ; of the centre tubular, 
hermaphrodite, yellow ; of the rays numerous, in a single 
row, female ; ligulse very slender, blue or white ; clinanthus 
convex, pitted, rough ; akenium angular, silky ; pappus 
hairlike, rough. — Herb rough; calathides panieled. 
Erigeron Canadense . Canada erigeron . 
Stem hirtous, panieled ; leaves lanceolate, fringed ; lower 
leaves toothed. 
Conyza Canadensis annua, acris, alba, linari® foiiis, Rail Syn. 175, 1. 
Erigeron Canadense, Lin. SL P. 1210. 
Canada fieabane. 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. TRIMORFHA. Cassine. Trimorphe . 
Pericline ovate; scales imbricate, lanceolate, awls h ape, 
acute ; calathides radiated ; flowers 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; akenium 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 caeruleus acris, Ran Syn . 175,3. 
Conyza caerulea acris, Ger. cm. 484, 10. 
Conyza odorata caerulea, Park. 126. 
Erigeron acre, Lin . S. P. 1211. 
Blue fieabane . 
Chalky hills ; perennial ; July and August. 
