234 PHANEROGAMOUS PLANTS. 



entire, or with a few sharp teeth; sometimes deeply pinnatifid, with 

 the lobes 2-3-toothed. Petals 4, two of them broader than the others. 

 Stamens often only 3. Pods smooth. Cotyledons incumbent. 



17. CAPSELLA, Vent 



1. Capsella Bursa-Pastoris, Moench. 



Hab. Around Fort Nisqually, Puget Sound, and in the interior of 

 the country : probably introduced from Europe. 



18. PLATYSPERMUM, Hook. 



1. Platyspermum scapigerum, Hook 



Hab. Stony land on the Kooskooskee River; flowering in January. 

 The fructiferous scapes are from 4 to 5 inches high. Pods broadly 

 oval, nearly half an inch in length ; the valves reticulated : dissepi- 

 ment very thin and translucent, without a longitudinal line; the 

 tubuli reticulated, forming minute transversely oblong areolae. Seeds 

 mostly 4 in each cell, surrounded with a very broad orbicular mem- 

 brane : funiculi free. This interesting little plant, so well illustrated 

 by Hooker, is of rare occurrence in collections. 



19. THYSANOCARPUS, Book. 



1. Thysanocarpus curvipes, Hook. 

 Hab. Puget Sound ; extending south through California. 



2. Thysanocarpus oblongifolius, Nutt. in Torr. & Gray. 

 Hab. Puget Sound, and low grounds on the Kooskooskee River. 



