156 FLORA OF LOWER COAL MEASURES OF MISSOURL 



von Roelil's figure^ of Volkmannia elongata, and one of the examples^ 

 identified by Weiss as Calamostachys Ludivigii to Asteroi:)hyllites longifoUus. 

 The variation in the size of the strobili and the width of the bracts in the 

 fractifications described tinder this name furnish another example of the 

 uniformity of the vegetation as compared with the reproductive organs in 

 the Galamari(B. 



The specimens of Asterophyllites longifoUus from the mines near Clinton 

 agree fairly well with examples of that species from the Bristol coal field 

 in England. 



Localities. — Gilkerson's Ford, U. S. Nat. Mus., 5432; Owen's coal bank, 

 U. S. Nat. Mus., 5423, 5677; Pitcher's coal bank, U. S. Nat. Mus., 5673, 5676. 



CALAMOSTACHYS Schimper, 1869. 



Traite, vol. i, p. 328. 



Calamostachys ovalisLx."? 



1858. Gf. Asterophyllites ovalis Lesquereux, in Rogers : Geol. Pennsylvania, voL ii, p, 



851, pi. i, fig. 2. 

 1884. Cf. Calamostachys ovalis Lesquereux, Coal Flora, vol. iii, p. 717 (pi. Ixxxix, 



figs. 3, 4«). 



Among the CalamaricB in the Lacoe collection in the National Museum 

 is a fragment, No. 8056, from Henry County, Missouri, which was iden- 

 tified by Professor Lesquereux as Calamostachys ovalis Lx. The specimen 

 comprises a segment of a compressed spike 45 mm. long- and 11 mm. wide, 

 the distinctly ribbed axis being 1.75 mm. wide, with internodes 4 to 5 mm. 

 in length. 



The bracts, of which there appear to be between 15 and 20 to the 

 verticil, are slender, narrow, carinate, tapering from near the base to the 

 very slender apex, and ai'e at first somewhat reflexed, then curved outward 

 and slightly upward, although the tip of the bract seldom reaches the 

 height of the next node. 



Unfortunately, the fragment does not reveal the mode of arrangement 

 of the sporangia with sufficient clearness to assure one of even its generic 

 relationship. But the entire absence of any trace of scars of the sporan- 

 giophores in the middle or upper portions of the internodes, as well as the 



' Foss. Fl. Steinkolilen-Form. Westphalens, pi. vii, fig. 1. 

 "Steinkohlen-Calamarieu, vol. ii, pi. xviii, fig. 2. 



