152 CRUCIFERAE 
[Von. II 
3. Erysimum syrticolum Sheldon. Sand Erysimum. (Fig. 1785.) 
Erysimum syrticolum Sheldon, Bull. Torr. 
Club, 20; 285. 1893. 
Similar to the preceding species and per- 
haps a form of it, but pale and finely ap- 
pressed-canescent, the stems stiff, erect or 
assurgent, branched near the base or simple, 
1°-2%° tall. Leaves firm, linear-lanceolate, 
entire or sparingly denticulate, 1/-2’ long, 
early falling away; flowers 3//-4/’ high; 
stigma conspicuously 2-lobed; style less than 
1’ long; pods linear, rather stout, 9//-18/’ 
long, nearly 1/’ thick, erect or nearly so on 
ascending pedicels 214’’-4’’ long; seeds ob- 
long, %’ long. 
On dry sandy banks, Minnesota to the North- 
west Territory. July-Aug. 
4. Erysimum asperum DC. Western Wall-flower. Yellow Phlox. 
(Fig. 1786.) 
Erysimum lanceolatum Pursh, Fl- 
Am. Sept. 436. 1814. Not R. Br. 1812- 
Erysimum asperum DC. Syst. 2: 505- 
1821. 
Erysimum Arkansanum Nutt.; T. & 
G. Fl. N. A. 1:95. 1838. 
Rough-pubescent or hoary, 1°-3° 
high, simple or branching above. 
Lower leaves lanceolate or linear, 
tapering into a petiole, dentate or 
sometimes entire, mainly. acute; 
upper leaves smaller, sessile or 
nearly so, entire or rarely toothed; 
flowers orange-yellow, large and 
showy, 6’’-12’” high and nearly as 
broad; pedicels stout, spreading, 
2//-3/’ long in fruit; pods linear, 
rough, 114/-4’ long, nearly 1’ wide, 
4-sided; style short, thick. 
In open places, Ohio and Illinois to 
Texas and the Saskatchewan region, 
west to the Pacific Coast. The eastern 
plant (2. Arkansanum Nutt.) gener- 
ally has broader leaves than the west- 
ern, Also in eastern Quebec, prob- 
ably adventive. May-July. 
34. ALYSSUM L, SP eleO5On el 5 a 
Low branching stellate-pubescent annual or perennial herbs, with small racemose yellow 
or yellowish flowers. Petals entire. Filaments often dilated and toothed or appendaged. 
Silicle ovate, oblong or orbicular, compressed, its valves nerveless, the septum thin. Stigma 
nearly entire. Seeds 1-8 in each cell of the pod, wingless; cotyledons accumbent. [Greek, 
curing madness. } 
A genus of about 100 species, natives of the Old World, some of them known as Madwort. 
