428 RypBERG: Rocky MouNTAIN FLORA 
Vv Lepidium Fletcheri sp. nov. 
Annual or biennial; stem erect, 3-5 dm. high, puberulent 
with short cylindric spreading hairs, branched above with ascend- 
ing branches; leaves narrow, pinnatifid with linear divisions or 
saliently toothed, 2-5 cm. long, puberulent ; those of the inflores- 
cence linear and entire ; sepals oblong, scarcely 1 mm. long, green, 
with white margins; petals none; stamens usually 2, scarcely ex- 
ceeding the sepals; fruiting racemes 3-5 cm. long; pedicels 4 
mm., terete; pod glabrous, scarcely 3 mm. long, obovate in out- 
line, ‘glabrous, strongly wing-margined above ; lobes of the wings 
nearly 0.5 mm., triangular-ovate, acutish or obtuse ; seed I mm. 
long, brown, wingless. 
This species is related to L. densiflorum and L. ruderale, but 
differs from both in the deeper, more open notch of the pod and 
the prominent lobes of the wing. From the former it differs also 
in the smaller pod and the narrow divisions of the leaves and 
from the latter in the leaves, of which none, apparently, are bi- 
pinnatifid. In the fruit it resembles Z. Bourgeauanum Thelling, 
but differs in the simple erect habit and in the pinnatifid leaves. 
Manitosa: Roadsides, Winnipeg, 1905, /. Pletcher (type in 
herb. N. Y. Bot. Gard.) ; apparently also 
SASKATCHEWAN: Cherryfield, 1906, Macoun & Herriot 69881. 
THELYPODIUM Endl. 
This genus as treated in the Synoptical Flora represents at 
least half a dozen different types of plants. Whether they should 
be regarded as one or more genera depends upon the individual 
tastes and inclinations of the botanist treating them. Dr. Greene, 
in splitting up the genus Streptanthus, expressed the opinion that 
either these two genera, Stanfordia and Caulanthus, should be 
united into one, or else Streptanthus should be divided into sev- 
eral. The writer agrees so far with Dr. Greene and thinks that 
Thelypodium and Caulanthus should be treated the same way. He 
has not been able to follow Dr. Greene in his segregation, how- 
ever, partly because he does not know well enough the West 
American species treated by Dr. Greene, and partly because his 
opinions differ considerably in some cases. One of these cases 
will be given below. : 
Thelypodium was established by Endlicher, and based wholly 
