1922] 



PAYSON — STUDY OF THELYPODIUM AND ITS IMMEDIATE ALLIES 309 



and T. neglectum may prove to be one of them." A field and 

 garden study of this species would seem to offer a most attractive 

 subject for investigation for the student of the region to which 

 it is native. 



It is of further interest to note that C. lasiophyllus is adven- 

 tive in Europe. Thellung reports it from Birsfelden (Switzer- 

 land) and from Rotterdam. So far as is known this is the only 

 member of this group of genera to become a weed. This is par- 

 ticularly striking because its nearest relatives are extremely re- 

 stricted in their range. 



Co-type material of T. neglectum has been examined at the 

 Gray Herbarium. It is a mixture of Thelypodium laciniatum 

 and Caulanthus lasiophyllus. This material was collected by 

 M. E. Jones at Santa Cruz, California in 1881. Sisymbrium 

 acuticarpum seems to belong here also. Material collected by 

 Prof. Jones from near the type locality and labelled in his own 

 handwriting as "Sisymbrium n. sp." does not differ from typical 

 forms of the species to any considerable extent. In the type the 

 pods were described as erect, in the material seen they are re- 

 flexed. 



Two specimens at hand from Catalina Island indicate that the 

 form there is not typical. Further collections may show it varie- 

 tally distinct. 



All material from interior states is more or less similar in leaf 

 texture and lobing and has accordingly been separated as a 

 geographical variety. It evidently intergrades frequently with 

 the coastal plant and may not be kept specifically distinct. 



STREPTANTHELLA 



Steeptanthella Rydb. Fl. Rocky Mountains, 364. 1917. 



Glabrous, annual herbs with entire or shallowly dentate leaves 

 and branched stems. Flowers relatively small; sepals, partic- 

 ularly the lateral pair, saccate at the base; petals with narrow 

 blades ; stamens distinct, anthers short, apiculate. Pods pendent 

 on recurved pedicels, sessile, strongly compressed, narrowed at 

 the apex to a conspicuous beak that simulates a persistent style ; 

 valves dehiscent at the base but remaining attached at the apex; 

 septum cells at the margin somewhat elongated at right angles 

 to the replum, in the middle elongated parallel to the replum, 

 all more or less tortuous. Seeds flattened, narrowly winged, coty- 

 ledons oblique. Generic tj'pe: S. longirostris (Wats.) Rydb. 



