256 CALIFORNIA ACADEMY OF SCIENCliJS. 



persistent unless broken by accident. The so-called calyx- 

 tube in this case is absolutely continuous with the ovary, 

 the placenta bearing seeds at the lower part and abortive 

 ovules above, diminishing upward until they are gradually 

 lost in the walls. It is therefore probably to be considered 

 as an upward prolongation of the ovary, like, but much ex- 

 ceeding that seen in CE. gaurcejiora and several other species. 



EucHARiDiUM Breweri Gray = Clarlda Breiveri &, Saxeana 

 Greene. 



The genera of Onagraceae, as at present accepted, are 

 diiSicult of definition and often confluent, but Eucharidium 

 seems to be quite as good as many of the others. It differs 

 from Clarlda in its long filiform calyx-tube, its free, 4-lobed 

 disk, four instead of eight stamens, and its peculiar papil- 

 lose, scale-margined, shell-like seeds. 



Whatever diflferences of opinion there may be as to the 

 generic validity of Eacharidium, there can be none as to the 

 specific value of Clarkia Saxeana, the specimen having been 

 compared both with Brewer's original and with more recent 

 specimens from Fresno (!!ounty, and found to be exactly 

 the same, a conclusion which almost any one taking the 

 trouble to read Dr. Gray's description of E. Breiveri, Proc. 

 Am. Acad. vi. 532, would probably reach without seeing 

 the specimens. 



Clarlda is much more closely related to Godeiia than to 

 Eacharidium, having, in common with the former, 8 sta- 

 mens, an obconic calyx-tube with adnate disk, and simi- 

 lar seeds. All distinctions founded upon the form of the 

 petals are broken down by such species as G. biloba, often 

 with 2-lobed cuneate petals, and G. epilohoides, sometimes 

 hardly distinguishable from Clarhiarhomhipetala. 



The appendages in the calyx-tube of many of these spe- 

 cies, Avhich I have considered to be the lobed margin of an 

 adnate disk, are often mentioned as scales at each side of the 



