Rvdberg: Rocky Mountain flora 151 



viz. : the original P. acuminatus Dough and my P. cyathophorus ; 

 and two with lanceolate upper leaves, viz. : P. Fcndleri A. Gray 

 and the original P. sccundiflorus Benth. Fremont's plant, the 

 type of the latter, is in the Torrey herbarium. On the sheet is 

 written in Dr. Gray's own handwriting : " This is only P. acumi- 

 natus, Dough ; small. A. G. 1862." - Dr. Gray afterwards trans- 

 ferred the name P. secundiflorus to an entirely different plant, 

 describing it in the Synoptical Flora. This therefore needs a 

 new name. 



^Pentstemon angustifolius caudatus (Heller) Rydb. 



Pentstemon caudatus Heller, Minn. Bot. Stud. 2: 34. 1898. 



P. caudatus Heller is in my opinion the southern more luxuri- 

 ant and broad-leaved form of P. angustifolius. The two grade 

 absolutely into each other in Colorado. 



' Pentstemon trichander (A. Gray) Rydb. 



Pentstemon barbatus trichander A. Gray, Proc. Am. Acad. II : 94. 



1876. 



This, as well as P. Torreyi Benth., I think should be kept dis- 

 tinct from P. barbatus (Cav.) Nutt. of Mexico. 



MYZORRHIZA Phil. Linnaea 29: 36. 1857. 

 The Nothaphvllon subgenus of Aphyllon as limited in Gray's 

 Synoptical Flora has been shifted back and forth between the genera 

 Pkelipaed, Anoplanthus and Aphyllon, and has lately been restored 

 to Orobanche, where its original species were described. The typical 

 species of Orobanche have a bilabiate calyx, while the species here 

 discussed have a 5-parted one. As far as I find, the only genus 

 described to which they can be referred is the one given above. 

 The following two species are found in Colorado : 



Myzorrhiza ludoviciana (Nutt.) Rydb. 



Orobanche ludoviciana Nutt. Gen. Am. 2 : 58. 18 18. 

 Aphyllon ludovicianttm A. Gray, Bot. Calif. 1 : 585. 1876. 



v Myzorrhiza multiflora (Nutt.) Rydb. 



Orobanche multiflora Nutt. Jour. Acad. Nat. Sci. Phila. II. 1 



179. 1848. 



Aphyllon mulHfl* 



585. 1876. 



