RyDBERG: Rocky MOUNTAIN FLORA 151 
viz.: the original P. acuminatus Dougl. and my P. cyathophorus ; 
and two with lanceolate upper ‘leaves, viz.: P. Fendlert A. Gray 
and the original P. secundiflorus Benth. Frémont’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 ?. acumi- 
natus, Dougl.; 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. 
Pentstmon 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. 11: 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 NorHapHytion subgenus of Aphyllon as limited in Gray's 
Synoptical Flora has been shifted back and forth between the genera 
Phelipaca, 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. 1818. 
Aphylion ludovicianum A. Gray, Bot. Calif. 1: 585. 1876. 
Myzorrhiza multiflora (Nutt.) Rydb. | 
Orobanche multiffora Nutt. Jour. Acad. Nat. Sci. Phila. Il. 1: 
179. 1848. 
Aphyllon multiflorum A. Gray, Bot. Calif. 1: 585. 1876. 
