724 IDAHO MINING DISTRICTS. 



MYRICA LANCEOLATA n. sp. 

 PI. XCIX, figs. 5, 6. 



Leaf of firm texture ; linear-lanceolate, tapering below into a long 

 wedge-shaped base which passes into a thick petiole l cm to 2 cm long; 

 apex broken but apparently long acuminate; margin irregular, faintly 

 toothed; midrib very thick, straight; secondaries obscurely preserved, 

 but apparently alternate, at an acute angle, and passing up for long 

 distances near the margin ; finer nervation hot retained. 



This species is based on the two fragments figured, both of which 

 represent the basal portion. The smaller of the two specimens (fig. 6) 

 is 6.5 cm in length including the petiole (1 CJU ), and was probably at least 

 9. 5 cm in length when perfect. Its width is abont . 75 cm . The nervation, 

 with the exception Of the thick midrib, is not preserved. The larger 

 leaf has only 5.5 cm preserved, including the petiole of 2 cm . Its length 

 must have been at least 12 cm . The midrib is very thick and straight, 

 as in the other. The width of this specimen is a little more than 1. 5 cm . 



This species is very closely allied to a species not yet published, 

 from the Lamar flora, in the Yellowstone National Park. The leaves 

 are of about the same size, the main point of difference being the 

 more pronounced teeth in the Lamar species. 



Locality: Cartwright ranch, on Shafer Creek, Boise County, Idaho. 



MYRICA ? IDAHOENSIS n. sp. 

 PI. XCIX, fig. 7. 



Leaf thickish, obovate-lanceolate, obtuse at apex, narrowed below 

 to a wedge-shaped base and a long, thick petiole; margin obscurely 

 crenate ; midrib thick, straight. 



This leaf is preserved entire, and is 9 cm in length, including the 

 petiole, which is 2 cm . In outline it is long, obovate-lanceolate, with 

 obtuse apex, and narrowed from above the middle to a long, wedge- 

 shaped base. The petiole is thick and much curved to one side. The 

 margin is rather remotely and faintly crenate, the teeth short and 

 obtuse/ The midrib is the only nervation preserved., and this is thick 

 and straight. 



In absence of better nervation there is some doubt as to the generic 

 reference of this leaf. It has been referred to Myrica provisionally, 

 until better material can be obtained. It has considerable resem- 

 blance to the living M. cerifera L. (common wax-berry), but it is impos- 

 sible to carry the comparison beyond similarity of shape, dentation, 

 and midrib. 



Locality: Two miles southeast of Marsh post-office, Boise County, 

 Idaho. 



