Ree. Oct. 30 

 Ans. Aug* 18 ,18^9 



Dyck Sept. 28,1 8^8 



Ycmr Wellborn 



Your very welcome, detailed letter of August 9 I posess sin.ee 

 a few days, and I also reeeived the Wislizenius report through your 

 Mister brot.her.We will thus soon be able to und erstand each other, 

 and this is always difficult thanks to the distance, which separates 

 us. One believes to talk about the same plant s, and with a careful 1 

 examinationr one finally finds a nisunderstanding. - I can now give 

 you an exaet report about earlier plant and. seed shipnerts.. Of the 

 latter have germinated Man. barbata , heni sphoerica , , applanata and 

 vi vi Dar a - Echinoc . unp-uispinus , Wislizenii , texensis (rio Grande 

 and Monterey) N Op . arborescens , ni ssouriensi s ? r - All others did not 

 germinate, and thoujrh I shall störe the seed pots, I have little 

 hope, that anytMng eise will cone up. Of the living plant s I sa^ed 

 Man , applanata , and two others (which were not in your inveutory) , 

 and of which I consider the one as your M. calcarata (olin sulcata ) 

 and the other as a variety of our M. scolynoid.es , which, however has 

 great sirailarity with the first, and could be your M .nigrocalcarata . 

 Anyhow, I do not know for seyrre, if finally your calcarata wont 

 agree with scoljmoides (Poerster p. 250) ?(The synonym with H. lori - 

 oata is in error). In order to get this cleared up, I shall teil 

 you the diagnosis of Scheidweiler and my renarks. . ® CbuU 



* M. scolynoides . H.^lobosa pastivq virens . appilis lanatis, na ~ 

 nillis subsulcatis ad sce^de^tibus inb^ic atis; areolis lanatis, tan- 

 dem nudis , aculeis nuraerosis, inferioribus rediantibus car^eis,. su- 

 perioribus f a s c i c u 1 a t i sft 1 b i s , a p i c e nigrescentibus ri.<?idls f . contra- 

 11 uno recnrvulo, ni^ro, basi n:riseo fl Scheidw. A.G.Z.. 18^1 - 

 To this I add: Hoc species non recte descripta est. Aostanfr 



aculei interiores 4, quorum this super ior es erecti, aculeis 



tibus adpressi, cun illis inplexi, et unus infirnus pate ns, 5-6 

 lin. longus. 



