428 Rydberg : Rocky Mountain flora 



Lepidium Fletcher! sp. no v. 



Annual or biennial ; stem erect, 3—5 dm. high, puberulent 

 with short cyHndric 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 i 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. densifloniDi and L. rndcralc, 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 L. Bourgemiainiin Thelling, 

 but differs in the simple erect habit and in the pinnatifid leaves. 



Manitoba : Roadsides, Winnipeg, 1905, J. Fletcher (type in 

 herb. N. Y. Bot. Gard.) ; apparently also 



Saskatchewan: Cherryfield, 1906, Macoiin & Herriot 6g88i. 



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 depeixls upon the individual 

 tastes and inclinations of the botanist treating them. Dr. Greene, 

 in splitting up the genus StreptantJius, expressed the opinion that 

 either these two genera, Stanfordia and Canlaiitluis, should be 

 united into one, or else Streptaiithus should be divided into sev- 

 eral. The writer agrees so far with Dr. Greene and thinks that 

 Thelypodium and CanlaiitJins 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. 



Tiielypodiiiiii was established by Endlicher, and based wholly 



