76 FLORA OF LOWER COAL MEASURES OF MISSOURL 



1888. Senftenbergia {Pecopteris) dentata (Brougn.) Stur, Toula, Die Steinkohleu, p. 



188, pL i, figs. 21, 22. 

 1877. Prepecopteris dentata (Brougn.) Grand 'Eury, FL Garb. Loire, p. 63. 

 1877. Senftenbergia plumosa (Artis?) Stur, Culm-Flora, vol. ii, p. 187 (293). 

 1885. Senftenbergia plumosa (Artis?) Stur, Fame d. Carbon-Fl., p. 92 (pars), pi. li, 



figs. 1, 2, 3. 

 1879. Peoopteris pennwformis Brougn., Lesquereux, Coal Flora, Atlas, p. 8, pi. xlv, 



figs. 1, la (figs. 2, 2a«); text, vol. i (1880), p. 239 (pars, excl. syn.). 



1883. Dactylotheca dentata (Brougn.) Zeiller, Ann. Sci. Xat., (6) bot., vol. xvi, p. 184, 



111. ix, figs. 12-15. 

 1888. Dactylotheca dentata (Brongu.) Zeiller, Fl. foss. liouill. Valenciennes, p. 30, figs. 



16((-&. 

 1890. Dactylotheca dentata (Brougn.) Zeiller, Fl. foss. Autuu et fipinac, vol. i, p. 21, 



figs. 17 Or-b. 

 1897. Dactylotheca dentata (Brougn.) Zeill., Potouie, Lehrb. d. Ptianzeupal., p. 92, figs. 



63 A, B ; p. 108, fig. 96. 



1884. Prepecopteris plumosa (Artis?) Bureau, Comptes reudus, vol. xcix, p. 1036. 



1885. Senftenbergia acuta (Brongu.) Stur, Fame d. Carbon-Fl., vol. i, p. 96, pi. li, figs. 



4, 5. 



1886. Pecopteris {Dactylotheca) dentata Brongu., Zeiller, Fl. foss. liouill. Valeucieuues, 



Atlas, pi. xxvi, figs. 1, la, b, 2, 2a-e; pi. xxvii, figs. 1, la, b, 2, 2ft, 3, 3«, 4; 

 pi. xxviii, figs. 4, 5, 5a; text (1888), p. 196. 

 1890. Pecopteris [Dactylotheca) dentata. Brongu., Zeiller, Fl. foss. Autun et fipinac,vol.i, 

 p. 66, pi. ixa, figs. 3, 3«. 



1886. Dactylotheca plumosa (Artis?) Kidston, Oat. Pal. Foss. PI. Brit. Mus., p. 128. 

 1896. Dactylotheca plumosa (Artis?) Kidstou, Trans. Roy. Soc. Ediub., vol. xxviii, pt. 1, 



p. 205, pis. i-iii. . 



1887. Dactylntlieca plumosa (Artist) Kidst. var. dewtoto (Brongu.) Kidstou, Foss. Fl. 



Radstook Ser., p. 382. 



Fronds large, tripiunate, quacMpinuatifid below,; primary rachis large, 

 5-12 mm. wide, finely tricliomatose ; secondary rachis 1-5 mm. broad, grooved 

 on the upper surface and finely punctate; primary pinnae alternate, at right 

 angles or oblique, often reflexed in the lower part of the frond, usually over- 

 lapping slightly, 3.5-11 cm. apart, oval-lanceolate, 18-50 cm. or more long, 

 3.5-12 cm. wide at the middle, somewhat contracted at the base, the sides of 

 the larger ones parallel in the middle portion, and tapering to a sharp point 

 above; secondary pinnse alternate, 6-12 mm. apart, usually overlapping 

 somewhat, the upper ones oblique, the middle nearly at right angles, the 

 lower ones often reflexed and shorter, often flexuous, linear-lanceolate, the 

 larger ones 2.5-6 cm. long, 5-25 mm. wide, tapering to an obtusely acumi- 

 nate point; pinnules alternate, more or less triang'ular, somewhat arched, 

 generally obtusely pointed or rounded, sometimes acuminate at the tip or 



