162 



SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1921. 



distribution. It occurs in both the Atiine and 

 Patoot beds of wostorn Greonland, in the Da- 

 kota sandstone of the West, in the Majjothy 

 formation of Marvhmd, and in the Bingen 

 sand of .Vrkansas and is very conmion in the 

 Tuscaloosa formation in western central .Vla- 

 bama. Abroad it has been recorded from the 

 lower Turonian of Bohemia. Dawson recorded 

 it frona Peace River m Northwest Territory. 



It occurs in the Dakota samlstone in Wood- 

 bury County, Iowa, in Ellsworth County, 

 Kans., and near Lander, Wyo. It is thus a 

 member of the true Dakota sandstone llora. 

 This is also emphasized by its distribution in 

 the Upper Cretacwius of the Atlantic Coastal 

 Plain. 



Although abundant this species lacks good 

 diagnostic characters, and its botanical affinity 

 is therefore uncertain. Its relation to Myrica 

 is o.xtremely doubtful. 



Order SALICALES. 



Family SALICACEAE. 



Genus SALIX Liimg. 



Salix lesquereuxii Berry. 



Salix Uiquereurii Berry, Torrey Bot. Club Bull., vol. 36, 



p. 2.i2, 1909; vol. 37, pp. 21, 194, 1910; New Jersey 



Geol. Survey Bull. 3, p. 114, 1911; U. S. Geol. 



Survey Prof. Paper 84, pp. 33, 109, pi. 7, figs. 11-13, 



1914; .Marj'land Geol. Survey, Upper Cretaceous. 



p. 814, pi. 58, figs. &-8, 1916; Torrey Bot. Club 



Bull., vol. 44, p. 176, 1917; U. S. Geol. Survey 



Prof. Paper 112, p. 76, 1919. 

 Salix proteiufolia Leequereux, Am. Jour. Sci.. 2d ser., 



vol. 46. p. 94, 1868 (not Forbes); The Cretaceous 



flora, p. CO, pi. 5, figs. 1-4, 1874; The Cretaceous 



and Tertiary floras, p. 42, pi. 1, figs. 14-16, pi. 16. 



fig. 3, 1883; The flora of the Dakota group, ]). 49, 



1892. 

 Newberry, The flora of the Amboy clays, p. 66, pi. 18, 



figs. 3, 4, 1896. 

 Kurtz, Mu8. La Plata Rev., vol. 10, p. jl, 1902. 

 Berry, New Jersey Geol. Survey Ann. Kept, for 190.'), 



p. 1:59, 1906; Torrey Bot. Club Bull., vol. 33. p. 



171, pi. 7, fig. 2, 1906; Johns Hopkins Univ. ('ire, 



new ser., No. 7, p. 81, 1907. 

 Salix proUae/olia Innrfifolia Lcs<|uereux, The flora <if the 



Dakota group, p, .50, pi. 44, fig. 9, 1892. 

 HartJH^h, Iowa Univ. Lab. Nat. Hint. Bull., vol, 3, p. 



179, 1896. 

 I'mUnuif* daphnogeoi/Jft lleer. Newberry, The flora of 



tho Amboy cla>'B, p. 72 (part), pi. 32, fig. 11, 1896. 

 l)fualfjurii gromlandirn Heer. Newberrj', The flora of 



the Amlioy clays, p. 129 (part), pi. 41, fig. 12, 1896. 



Leaves ovate-liin<'eoIate, somewhat more 

 Miiifiiuiiiii' idiove than below, \iirinble ill size. 



ranging from 6 to 12 centimeters in length 

 and from 1.1 to 2.2 centimeters in greatest 

 width, which is usually slightly t)elow the 

 middle. Petiole stout, much longer than in 

 Salix Jieiitosa, having a ma.ximiim length of 

 1.2 centimeters. Midrib stout below, ta])ering 

 above. Secondaries numerous, in some speci- 

 mens as many as 20 pairs; they branch from 

 the midrib at angles of about 45° and are sub- 

 parallel and camptodrome. 



This species is e.xcecdingly variable, as might 

 be expected in a Salix, and Lesciuereu.x estab- 

 lished several varieties, of which at least one, 

 Umarifolia, is referable to Salix flexuoaa New- 

 berry. Some of Lesqucreu.x's forms are dis- 

 tijiguishable with difliculty from Salix fltmosa, 

 and this is especially shown in the leaves which 

 he figures on Plate I of his "Cretaceous and 

 Tertiary floras." They are, however, larger 

 and somewhat more robust, of a thicker texture 

 anil broadest near the base, from which they 

 taper upward to an exceedingly acuminate tip. 

 In general Salix lesquereuxii is a relatively 

 much broader, more ovate form, with more 

 numerous and better seen secondaries and a 

 longer petiole. 



This species is an exceedingly abimdimt 

 Upper Cretaceous type in both the East and 

 the West, ranging chronologically in the Coastal 

 Plam from the base of the Raritau formation 

 to the top of the Tuscaloosa formation, and 

 possil)ly through the Eutaw formation as well. 

 It is al)undiuit in the Afagothy and Black Creek 

 formations, mcludijig the Middendorf arkose 

 member of the Black Creek. It is widespread 

 from the bottom to the top of the Tuscaloosa 

 formation in Alabama imd occurs in the Bingen 

 sand of Arkansas. In the West it is a member 

 of the Dakota sandstone ilora and is not |)resent 

 in the older Cheyenne sandst*>ne flora, nor is it 

 known from ])eds younger thiui the Dakota 

 sandstone in that region. It is one of the forms 

 recorded by Kurtz from (he Upi)er Cretaceous 

 of Argentina, indicating, if the identification 

 is correct, wliicb is doubtful, a very consider- 

 able migration during early Ip per Cretaceous 

 time, 



Kecentl}^ Know lion'" lias tentatively identi- 

 fied this species from (lie type section of ilie 

 Morrison formation in Colorado, 



' KiKiwItnii, V. H., Aio. Jour, Sol., Ith M<r., vol. 4R, p, IWI. toai. 



