100 Rydberg: Studies on the Rocky Mountain flora 



himself the leaves are both 2- and 3-ranked on different twigs of 

 the same branch. The seeds in /. tUaheftsis are either obtuse or 

 acutish at the apex, and these characters do not furnish any dis- 

 tinction. I have spoken to Dr. J. A. Shafer, who helped Dr. N. L. 

 Britton in preparing North American Trees, and he told me that 

 he had come to exactly the same conclusion as I. 



The following two changes in the nomenclature seem to be 

 advisable. 



Hesperopeuce Mertensiana (Bong.) Rydb. comb. nov. 



Pimcs Mertensiana Bong. Mem. Acad. Sci. Nat. St. Petersb. VI. 

 2: 163. 1832. 



Abies Mertensiana Lindl. & Gord. Journ. Hort. Soc. Lond. 5: 211. 

 1850. 



Abies Pattoniana Jeffrey ; A. Murray, Rep. Oregon Exped. i. 1853. 



Tsuga Pattoniana Senec. Conif. 21. 1867. 



Hesperopence Pattoniana Lemmon, Rep. Calif. State Board 



^ Forestry 3: 126. 1890. 



Tsuga Mertensiana Sargent, Silva 12: 77. 1898. Not T. Merten- 

 siana Carriere, 1867. 

 I agree fully with Mr. Lemmon that this species should be 



removed from Tsuga. Both its cones and its leaves are more like 



those of a spruce than those of a hemlock, and the habit of the 



tree is different from both. Mr. Lemmon, however, did not adopt 



the oldest available specific name. 



Sabina horizontalis (Moench) Rydb. comb, nov, 

 Juniperus horizontalis Moench, Meth. 699. 1794- 

 Juniperus prostrata Pers. Syn. 2: 632. 1807. 

 Juniperus Sabina procumbens Pursh, Fl. Am. Sept. 647. 1814. 

 Sabina prostrata Antoine, Cupress. Gatt. 57. 1857-70. 



EPHEDRACEAE 



Marcus E. Jones* reduced Ephedra viridis Coville to a variety 

 of E. nevadensis. I do not know exactly what E. viridis is, as I 

 have not seen the type, but the Utah plant which Jones had in 

 mind, does not seem to agree with the description. We have dupli- 

 cates of some of the numbers cited by Jones, and these seem to be 

 typical E. nevadensis. 



* Proc. Calif. Acad. II. 5: 726. 1895. 



