232 PHANEROGAMOUS PLANTS. 



Plate 1. — Thelypodium brachycarpum. An entire plant of the 

 natural size. Fig. 1. Plan of the flower. 2. A flower partly ex- 

 panded. 3. A petal from the same. 4. A stamen from the same. 

 5. A flower fully expanded. 6. A sepal from the same. 7. A petal. 

 8. One of the longer stamens. 9. One of the shorter stamens. 10. 

 The pistil, with the glands at its base. 11. One of the glands. 12. 

 A branch bearing ripe pods. 13. Tissue of the partition. 14. A 

 little of the same, more magnified. 15. A seed transversely divided. 

 16. The embryo. All the details more or less magnified. 



12. VE SIC ARIA, Lam. 



1. Vesicaria Ludoviciana, DO. 



Hab. Sandy banks of the Columbia River. — The specimens are 

 unusually tall, some of them being a foot and a half high. 



13. P H Y S A R I A, Gray. 



1. Physaria didymocarpa, Gray. 



Hab. Banks of rivers; interior of Oregon, widely distributed 

 throughout the dry central regions of the continent. 



2. Physaria Geyeri, Gray. 



Hab. Prairies along the Columbia River, between Spokane River 

 and Fort Colville, interior of Oregon. — A very distinct species, well 

 described and figured by Hooker. The pods are scarcely one-fourth 

 the size of those of P. didymocarpa. As these species (to which 

 a third, P. Newberryi, has been added) have only the aspect, and 

 not the carpological character, of Vesicaria, the genus would seem to 

 be a good one. 



