SPHENOPHYLLALES— SPHBNOPHYLLUM. 183 



after searching in ^^ain for a satisfactory place for it among the many exist- 

 ing species. 



The phmt is of a dehcate type, the branches slender and graceful, the 

 internodes relatively long, the ribs narrow, angular, Avliile the segment of 

 a larger stem at the left in Fig 6«, PL L, is distinctly lineate. While in 

 its general aspect and especially in the outlines of the leaves our form, 

 which is photographed twice the natural size in PL LI, resembles the Splieno- 

 phyUites angustifoUus of Germar,^ the difference in the minor characters, par- 

 ticularly the details of the nervation, as shown in the description and figures 

 of S. angustifolkmi (Germ.) Goepp. given by Coemans and Kickx," Renault,^ 

 and Weiss,* or of the var. Ufidum Gr. 'Eury by Renault,^ in all of which we 

 find long, slender, acute-pointed pinnules more deeply dissected and with 

 the nerves separate and distinct from the base in the bidentate forms, is too 

 great to permit its union under the same name. In fact, the essential char- 

 acters are probably nearer *S'. oblongifolium, especially as that species is 

 figured by the same authors," though in the form of the leaves and their 

 attitude in the verticil it is quite different from that species. 



Sphenophylhim Lesairianum is not easily confused with the j^ounger 

 species, S. fiUculme Lx., S. temiifolmm F. and W., or S. densifoUum F. and 

 W., all of which difi"er by the disposition of the leaves in the verticil, by 

 the nervation, and by the margins. 



Locality. — Near Clinton, Henry County, Missouri, precise locahty not 

 known; Lacoe collection. No. 8711, U. S. Nat. Mus. 



Sphbnophyllum (Astebophyllites?) fasciculatum (Lx). 

 PI. L, Figs. 1-4. 



1879. AsterophijlUtes fasciculatus Lesquereux, Goal Flora, Atlas, p. 2, pi. iii, figs. 1-4, 

 4a; text, vol. 1 (1880), p. 41. 

 Stems 1 to 7 mm. wide, branching freely, dichotomously, or oppositely 

 (f), with about 3 to 6 rounded, obscurely lineate-rugose, hardly striate, non- 

 alternating ribs dilated at the nodes ; branches irregular, flexuous, forking 



' Verst. Steink. Wettiu ii. Lobejiin, p. 18, pi. vii, figs. 4-7. Schimper, Traits, vol. i, pi. xx, figs. 1-4. 

 Von Roehl, Fo.ss. Fl. SteinkoUlenf. Westphalens, pi. iv, fig. 18. 

 ; Bull. Soc. Roy. Belg., (2) vol. xviii, 1864, pi. i, tigs. la-c. 



5 Cours bot. foss , vol. ii, 1882, pi. xiii, figs. 19, 20, 21. 

 ■I Aus d. Flora d. Steinkohl., 1881, pi. x, fig. 61. 



■^Fl. foss. bassin houill. C'ommentry, vol. ii, p. 485, pi. 1, figs. 6, 7. 



6 Coemans and Kickx, loe. cit., figs. 8a-c. Schimper, op. cit., 1, p. 343, pi. xxv, figs. 5-9. Renault, op. 

 cit., vol. ii, pi. xiii, iigs. 15, 16, 17. Weiss, op. cit., pi. x, fig. 59. 



