Hegelmaler Oct. 3, 1867 4 



.... Sj?f9V/fe. . . . .( the German word is GM i - schurr ; — ? ?■ E . D'. ) In 



Germany it is smaller, mm long and less,in other places 



it appears even smaller , down to 0.5 and 0.4. What however none of the 

 observers has seen on this so well distributed plant f and t what does 

 not exist, is pigmentation in the epidermis. These are,as far as we 

 know prenerally until now, just as characteristic for certain- species 

 (asW. brasiliensis and Welwitschii ) as for certain others ( arrhiza . 

 columbiana ) as no human bei ng has seen themv and for this reason,as 



1 believe.the presented" arrhiza var. . serulosa from Detroit does 

 not belong to arrhiza . It will primarly depend, if the specific- ame- 

 rican form has always the pigmentatiorr. You receive here a small ori- 

 ginal sample of W. brasiliensis . of which I myself have of course only 

 very little. It will certainly interest you,that the plantlets, which 

 are in part flowering and in fruit,, are on average \ larger than 

 yours from Detroit, which Ireceived; and the pigment in the pigraent 

 cells is larger, and, thus, the points are darker..Both are ,accor - 

 diner to my experience so far differences of little meaning,and U. 

 attribute your plantlets most determintly to ¥. brasiliensis . Both 

 have a placea (??? E.D. ) with numerous spl't-openings provided air- 

 openin^s. . The stomata are considerably smaller than with arrhiza . 

 With W. columbiana the upper surface is apparently convex,thus the 

 overall L form of the front ellipsoid and what ties in to that,there are 

 only few stomata; with the original plants of Kersten- I find normally 



2 - 3# the northern ones have some more, and are somewhat more robust 

 than the others, of which I today cannot share any, ,because at this 

 time I have only my drawings and notes^. Kersten f s dia^nosis is very 



. . s . h .°. r . t . . • and besides irecorrect. . 1 1 is calleß[ Botanische Untersu- 

 chungen p. 106j w W. columbiana bald and without glands and provi- 

 ded with one lit-opening. . W. brasiliensis Wedd. bald, with warty 

 Irlands (!) and as the following with many sli t-openings 



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