158 FLORA. OP LOWER GOAL MEASURES OP MISSOURL 



becoming entirely separated and free as the stems increase in tMckness, 

 instead of remaining- united in the sheath, thus reproducing- on a smaller 

 scale the features seen in foliate portions of Calamites varians Stb. {Cala- 

 mitina of Weiss). So close is A. stellata to the Calamites group that Dr. 

 Potonie appears to regard its relation as branch or twig of some Calamites 

 as not very improbable. 



Fragments of Aunularia stellata with leaves still joined to larger stems 

 have been described by Professor Zeiller and Mr. Lacoe.^ 



Annularia eamosa Weiss. 



1S2S. Annularia radiata Brongn., Prodrome, p. 156 (pars.) 



184S. Annularia radiata Brongn., Sauveur, Veg. foss. terr. houill. Belg., pL Ixvii, tig. 2. 



1855. Annularia radiata Bi-ongu., Geiuitz, Yerst. Steinlcolil. Sacbsen, p. 11, pi. xviii, 



figs. G, 7. 

 1800. Annularia radiata Brongn., von Roebl, Poss. Fl. Steinlioblenf. Westplialens, p. 



28, pi. iv, fig. 3. 

 1874. Annularia radiata Brongn., O. Peistmantel, Yerst. biihrn. Abl., vol. i, p. 130, pi. 



xvii, figs. 2, 3, 4. 

 1878. Annularia radiata Brongn., Zeiller, Yidg. foss. terr. houill.. Atlas, pi. els, fig. 1; 



text (1879), p. 24. 

 18SG. Annularia radiata Brongn., Zeiller, PI. foss. houill. Yalenciennes, Atlas, i)l. lix, 



fig. 8; pi. 1x1, figs. 1,2; text (1888), p. 394. 

 1877. An Calamites nodosus ScMoth., Lebour, Illustr., pi. iii? 

 1881. Annularia ramosa Weiss, X. Jalirb. f. Min., vol. ii. Brief., p. 273. 

 1884. Annularia ramosa Weiss, Steinkolilen-Cal., vol. ii, ji. 98, j)l. v, figs. 1, 2; pi. vi, 



figs. 1-7; pi. X, fig. 1; pi. XX, figs. 1, 2. 

 1893. Annularia ramosa Weiss, D. White, Bull. U. S. G-eol. Surv., ISTo. 98, y>. 17. 

 1887. Annularia ramosa Weiss, Stur, Galamar. Schatzlar. Sch., y>. 106, i)l. xii6, figs. 



2, 3, 4, 6; pi. xiii, figs. 1,3-9; pi. xiv, figs. 3-5. 

 1880. Calamites [Eucalamites) ramosus Artis, Kidston, Poss. PI. Lanarksli., p. 51, pi. iii, 



fig. 1. 



Pructification. 



1884. Calamites (^Eucalamites) ramosus Artis, Weiss, Steinkohlen-Cal., vol. ii, p. 98, 



pi. V, fig. 2 ; pi. vi, figs. 2, 3, 4, 0, 7 ; pi. xx, figs. 1,2. 

 1884. Calamostachys ramosa Weiss, Steinkohlen-Gal., vol. 11, p. 180, pi. xx, figs. 1, 2. 

 1887. Calamites ramosus Artis, Stur, Galamar. Schatzlar. Sch., vol. ii, p. 90, (pi. xii, figs. 



5, 6) ; pi. xiib, figs. 2, 3, 4, 0. 



Considerable variation is to be found among the leaves of this species, 

 which, as was demonstrated by both Weiss and Stur,- includes the foliate 



' See Zeiller, Fl. foss. bassiu hmiiller fie Vsileiiclenues, 1888, p. 399; also Bull. U. S. Geol. Surv., No. 

 98, 1893, p. 27. 



- See the resiime on the relations of this species in Bull. U. S. Geol. Suvv., No. 98, 189.^, p. 23. 



