376 PROCEEDINGS OF THE AMERICAN ACADEMY 



21. Achlts triphylla DC. ; Hook. 1. c. t. 12. Specimens chiefly 

 with mature fruit. The pericarp, when dry somewhat quasi-crelosper- 

 mous, is certainly not " bivalvatim dehiscens " nor really dehiscent at all. 

 The whole dorsal portion, of a chestnut-brown color, is almost cartilagi- 

 nous ; the ventral portion thin, membranaceous, and strongly concave 

 or cupped, with a fleshy central ridge, which when soaked, and proba- 

 bly in the fresh state, swells up very much and fills the concavity. 

 This pulpy portion might be likened to the thickened placenta of 

 Podophyllum. The seed, however, does tfot rise from it, but from the 

 base of the cell. 



22. Brasenia peltata Pursh. The only specimens seen from the 

 Pacific side of the continent, except those collected in Wilkes's Explor- 

 ing Expedition. 



0. Nuphar polysepalum Engelm. in Trans. Acad. St. Louis. 



23. Eschscholtzia Californica, var. Douglasii Torr. & Gray : 

 chiefly small-flowered forms. 



24. Dicentra FORMOSA DC. Apparently not distinct from the 

 Eastern D. eximia. 



25. Nasturtium curvisiliqua Nutt. in Torr. & Gray, 1. c. Char, 

 to be altered, and species to include at least N. polymorphum Nutt., a 

 better name for it. Forms, with slender pod and sometimes slender 

 pedicel, the style very short but distinct (25) : with shorter narrow 

 pod on short pedicel (26) : with thicker pod on short pedicel, nearly or 

 quite the same as N. hjratum Nutt. (27). 



28. Nasturtium palustre DC. : the ordinary European form. — 

 N. 4, of Lyall's collection on the 49th parallel, with pods too long 

 for N. palustre, is exceeded in this respect by the plant from the same 

 district, (wrongly) named JV. lyratum in the 12th volume of the Pacific 

 Railroad Explorations, which again comes near N. montanum Wall., 

 a species which on the Asiatic side occurs as far north as Corea. 



29. Cardamine cordifolia Gray PI. Fendl. p. 8. Form with 

 weaker stem and ampler leaves, of round-cordate or almost reniform 

 outline, bearing therefore a closer resemblance to G. asarifolia, but the 

 less dentate leaves, short style, and smaller stigma distinguish it. 

 Watson's specimens from Utah and Nevada are intermediate between 

 these and Fendler's original plant. 



30. Cardamine angulata Hook. Bot. Misc. 1, p. 243, t. 69. 



31. Cardamine oligosperma Nutt. in Torr. & Gray, 1. c. Ap- 

 parently a good species. Radical leaves often simple. 



