964 Compositae. 
Pappus setaceous, 1-seriate (or biseriate). — Annual or perennial 
herbs. Leaves alternate, entire, toothed (or divided). Capitula 
various in size, solitary or cymose. Ray violet purple or white. 
A large genus of the temperate regions of both hemispheres. 
A. Pistillate flowers all strap-shaped. Pappus 
BPD) FONT = oy Ss), Singha: neg idgias aa OA ae . - . 1. BE, canadensis, 
B. Outer pistillate flowers strap-shaped, inner- 
ones filiform. Pappus in 1 row. 
I. Involucral-bracts linear-lanceolate ... 2. EK. Karwinskyanus. 
Il. Involucral-bracts linear-spathulate . . . 3. E. alpinus. 
C. Pistillate-flowers all filiform. Pappusin2 rows 4. E, ecrispus. 
1322. (1.) Erigeron canadensis L. Spec. Plant. I (1753) 
p. 863. — Boiss. Flor. Or. HI, p. 163. — DC. Prodrom. V, p. 289 
— Torr. and Gray Flor. IJ, p. 167. — A stiff, erect annual, 30 to 
60 cm high, glabrous, except a few long, spreading hairs. Leaves 
narrow, and entire or slightly toothed. Flower-heads very small 
and numerous, forming a long, narrow, leafy panicle. Florets minute, 
the outher ones filiform, scarcely longer than the involucre, white 
or slightly tinged with red; central ones tubular, yellowish-white. 
— Flow. March to April. 
M. ma. Alexandria-West near Behig, probably recently intro- 
duced (Muschler). 
A native of North America. 
1323. (2.) Erigeron Karwinskyanus DC. in Prodrom. V (1836), 
p. 285. — A stiff erect perennial plant or a small bush of 30 to 
50 cm in height puberulous. Stem-leaves obovate longly cuneate, 
glabrous on both surfaces, somewhat ciliate at the base, 3—5-toothed 
at the apex, teeth large, obtuse, mucronate; the upper ones entire; 
capitula pedunculate loose corymbosed; involueral-bracts glabrous 
linear-lanceolate; rays twice as long as the disk. — Flow. March. 
M. ma. Alexandria, often in gardens and sometimes naturalized, 
introduced from the Riviera. 
A native of Tropical America. 
1324. (3.) Erigeron alpinus L. Spec. Plant. 1 (1753), p. 864. 
— DC. Prodrom. V, p. 291. — Boiss. Flor. Or. HI, p. 165. — Erigeron 
olympicum Schott and Kotschy Oesterr. Wochenbl. VIII, p. 230. — 
Rehbch. Ice. XVI, tab. 914. — Engl. Bot., tab.464. — Erect herb, 
with strict ascending, sparsely pubescent striate branches, terminating 
in solitary or subsolitary capitula. Leaves (cauline) alternate or 
rarely subopposite, linear-oblong or elongate-lanceolate, mucronate, 
with a wide sessile somewhat clasping base, submembranous, quite 
