Ree April 26 Uyck March 29. . l855 f 



Ans. May 3 



Your Wellborn 



Your raost valuable letter of the 27th of last month came alrea- 

 dy a few days ago, and a little case of the here prevalent grippe pre- 

 vented me to ans wer earlier. -I know now, that my shipment of last year 

 of lllustratlons and sceletons came properly into your hanjk; it seems 

 to me, however, that you have not yet recelvedr my latest letter of the 

 current year and the No. 4 of the Allgemeine Botanical Newspaper, which 

 contains a second essay of mine. You will find in that the answer to 

 several questions, which you pose, and also an extensive disserta - 

 tion about the genesis of varieties and the hybrids. . Simultaneeously 

 I undertook a revision of the genus Mamillaria ; changed here and there 

 the characters of the sections, as well as theifcr sequence, and I hope t , 

 that your Wellborn will agree with me about all these corrections. - 

 My profession seems to direct me, to rather perfect the systematic 

 Organization of the family, the tribus, and the specific genera, than 

 to create new species f which can be determined only extremely rarely 

 with füll certainty. 



What you teil me about your Echinocereus dasyacanthus, and of 



its yellow flowers, is welcome for me. I have(from Mr. Scheer.who rec- 



ceived it from Mr. Potts) an Echinocereus , which I named subinermis. 



and which until now surprisingly diverts from the other species 



through its yellow flowers. It also has only 7 ribs 



" pilvillis satis confertis, junioribus m inutis gilvo tomentosis in« 



ermibus senioribus longiore instruetis. Caulis subeylindracus, , 



minusque pull. 2 alter, sim plex; et poll. 2§ latus; 7 costatus, apice 



obtusus, subumbelicatus,? The flower has the green, 8-divided # long 

 " " — - light 



Stigma, and is otherwise yellow . - The plant does, however, not fit 

 into any of the existing subdivisions of the section- Echinocacti, . and.. 



1 



cm 



S S OU R I 



7 8 9 10 



Bot a n i 



Copyright reserved g a r d 



