732 IDAHO MINING DISTRICTS. 



is also similar, but differs in outline and in having fewer secondaries. 

 As nearly as can be made out, the leaflets under consideration belong 

 to this genus and are provisionally so placed. 



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

 Idaho. 



PLATANUS ASPERA ? Newb. 

 Proc. U. S. Nat. Mus., Vol. V, p. 509, 1883; Plates ined., PI. XLII, figs. 1-3. 



The collection contains several fragments of Platan us leaves, but 

 hardly enough to be certain of their reference to this species. It is 

 probable, however, that the identification is correct. 



Locality: One mile southeast of Marsh post-office, Boise County, 

 Idaho. 



CELASTRUS LINDGRENI n. sp. 

 PL XCIX, fig. 13; C, fig. 6. 



Leaf membranaceous ; lanceolate-oblong in outline, narrowed below 

 into a wedge-shaped base and prolonged above into an acuminate 

 apex; margin obscurely serrate, the teeth small, obtuse; midrib 

 rather thick and strong; secondaries about 10 or 12 pairs, suboppo- 

 site, emerging at an angle of 45 or more, camptodrome, each arched 

 and joined to the one above by a broad loop some distance within the 

 border, with one series of smaller loops outside from which weak 

 branches pass to the teeth; intermediate secondaries occasionally 

 present, soon lost; nervilles much broken, forming large, irregular 

 areolse. 



The somewhat fragmentary leaves figured are the only specimens of 

 this form in the collection. The smaller appears to have been about 

 6.5 cm in length, and a little more than 2 cm in width at the broadest 

 point, which is a little below the middle of the leaf. The larger leaf 

 was 8 or 9 cm in length, and is about 3.8 cm in width. The nervation of 

 both is finely preserved, and is quite characteristic of the genus 

 Celastrus. 



The species with which this is to be compared is Celastrus frax- 

 inifolius Lx./from Florissant, Colorado. The general resemblance is 

 very marked, the differences being rather of minor or specific impor- 

 tance. They are as follows : In C. fraxinifolius the leaves are broad- 

 est below the middle, the petiole is winged (broken in C. lindgreni), 

 the teeth are fewer and stronger, .and the secondaries fewer. 



Among the numerous new species of this genus found in the Yel- 

 lowstone National Park, but still unpublished, there are several to 

 which this is evidently related. 



Locality : Idaho City, Idaho. 



' Cret. and Tert. Fl., p. 184, PI. XXXIII, figs. 2-4; XL, fig. 10. 



