162 FLORA OF LOWER COAL MEASURES OF MISSOURI. 



of the Outlying- Carboniferous Basins of Southwestern Missouri/ In the 

 material from the vicinity of Clinton is a rock on which one fine verticil of 

 this species includes as luany as twenty-seven leaves. Another fragment, 

 from Hobbs's bank, contains portions of a plant in which the leaves are 

 nearly 6 cm. in length. The same piece of shale bears a small Lamelli- 

 branch, but the valves of the latter are unfortunately crushed too much to 

 admit of its determination. Many of the specimens, especially those from 

 Dee^jwater, show the mucrons clearly developed at the apices of the sha- 

 greened leaves. In some examples the upper surface of the leaves is Avell 

 arched uj^ward, the midrib being so faint as to suggest the form named 

 A. inflata by Professor Lesquereux, but on the under surface of these leaves 

 the midrib is in strong relief It is possible the rugose or shagreened effect 

 is due to the presence of very short hairs similar to those described by Dr. 

 Potonie. I have not yet been able clearly to discern the transpiration 

 zones noted by Potonit^ on each side of the central nerve. 



In many of the Henry County specimens the leaves 23resent a lax, 

 slightly flexuous habit, suggesting the phase seen in the earliest precursors 

 of the species in the upper part of the Pottsville series. There are also 

 present a number of strobili, some of which are so broken as to show the 

 characters of the axis, the sporangiophores, attached near the middle of the 

 internode, and the sporangia. A description of the fruit, which agrees with 

 the '■^Asterophyllites" figured by Lesquereux in fig. 10, pi. iii, of the Atlas to 

 the Coal Flora, may be found in the above-mentioned report on the flora of 

 the outlying basins of this State. 



The systematic relation oi Anmdaria stellata lias been referred to above 

 in m}' remarks on the genus Annularia. 



■ Localities. — Pitcher's coal bank, U. S. Nat. Mus., 5434, 5436, 5443; 

 Hobbs's coal bank, U. S. Nat. Mus., 5444, 5537, 5586; Owen's coal bank, 

 U. S. Nat. Mus., 5433, 5445; Deepwater, U. S. Nat. Mus., 5442, 5446, 5538; 

 Gilkerson's Ford, U. S. Nat. Mus., 6229. 



Annularia. steli.ata (Schlotli.) Wood var. angustifolia Lx.? 



1884. Annularia longifoUa var. angustifolia Lesquereux, Coal Flora, vol. iii, p. 879 



[nomen nudum). 

 1890. Annularia angustifolia (Lx.) Hambacli, Bull. Geol. Surv. Missouri, No. 1, p. S3. 



I Bull. U. S. Geol. Suiv., No. 98, 1893, p. 25. 



