264 MESOZOIC FLORAS OF UNITED STATES. 



A considerable number of specimens of a conifer that is probably 

 Sequoia Reichenbachi were found at localities Nos. 1, 16, and 17. They are 

 most numerous at locality No. 1. They are all imperfectly preserved and 

 consist of small fragments of branches. Some of them show a diameter 

 of 5 mm. The leaves have the character of those of S. Reichenbachi. 

 They are comparatively long and are widest at base and decurrent. They 

 have a midrib and narrow gradually to their tips. They are also curved 

 inward toward the stem. 



PI. LXIX, Figs. 4 and 5, represent portions of such leafy branches. 

 Fig. 5 delineates a very slender twig. 



Sequoia ambigua Heer. 



PL LXIX, Fig. 6. 



1874. Sequoia ambigua Heer: Fl. Foss. Arct., Vol. Ill, Pt. II (Kreide-Flora der 

 Arctischen Zone), p. 78, pi. xxi, figs. 1, 2a, 3-8, 9a, 10a, b,c. 



Sequoia ambigua Heer was found in a considerable number of speci- 

 mens. It occurs at localities Nos. 1, 16, and 17. It is most abundant at 

 locality No. 1. All the specimens consist of fragments of ultimate twigs, 

 containing some leaves. One of the imprints shows at the summit of the 

 twig traces of a cone. The specimens are not verj^ well preserved, but 

 show the characteristic features of S. ambigua with sufficient clearness to 

 render it certain that this conifer exists in the Horsetown beds. 



PL LXIX, Fig. 6, represents a fragment of a stout twig, with some of' 

 the leaves well preserved. 



Genus SPHENOLEPIDIUM Heer. 



Sphenolepidium Sternbergianum (Dunker) Heer. 



Pi. LXIX, Fig. 7. 



1846. Muscites Sternhergianus Dunk.: Monogr. d. Norddeutsch. Wealdenbildung, 



p. 20, pi. vii, fig. 10. 

 1849. Juniperites Sterniergianus (Dunk.) Brongn. : Tableau, p. 108. 

 1852. Araucarites Dunkeri Ett. in pt. : Abh. d. k. k. Geol. Reichsanst., Vol. I, Abth. 



Ill, No. 2, p. 27, pi. ii, figs. 2, 3, 7, 8. 



1870. Widdringtonites Dunkeri (Ett.) Schimp.: Pal. Veg., Vol. II, p. 329. 



1871. Sphenolepis Sternhergiana (Dunk.) Schenk: Palaeontographica, Vol. XIX, p. 



243 [41], pi. xxxvii [xvi], figs. 3, 4; pi. xxxviii [xvii], figs. 3-13. 

 1881. SpTienolepidium Sternbergianum (Dunk.) Heer: Fl. Foss. du Portugal, p. 19, 

 pi. xiii, figs, la, 2-7, 8b, pi. xiv. 



