32 TRAKSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



vertical rows. Sporangia immersed within the tissue of the 

 bract or sporophyll. Rhizomes, Stigmaria and Sligmariopsis. 



IX. Sigillaria, Brongniart, 1822. 



X. Sigillariostrobus, Schimper, 1870. 

 XI. Stigmaria, Brongniart, 1822. 

 XII. Stiijmariopsis, Grand 'Eury, 1870. 

 E. Of Uncertain Affinity. [Lycopodiaceous.) 

 XIII. Spencerites, Scott, 1899. 



SPHENOPHYLLALES. 



SpHENOPHYLLEwE. 



Plants of moderate size, with comparatively slender jointed 

 and ribbed stems. Ribs not alternating at the somewhat tumid 

 nodes. Branching irregular, not more than one given off from 

 a node. Leaves verticillate, cuneate, toothed, cleft, or dichoto- 

 mously divided into linear segments or thread-like divisions. 

 Fi'uctification in the form of long and narrow cones. 

 Siihenophylhmi, Brongniart, 1822. 



Genera of Uncertain Position. 



I. Cheirostrobus, Scott, 1897. 



II. Psilotites, Goldenberg, 1855. 



III. Traquairia, Carruthers, 1872. 



I. Lycopodites, Brongniart, 1828. 



1828. Lycopodites. Brongniart, Prodrome, p. 83. 



1849. Lycopodites. Brongniart (emend.), Tableau d. ve'ge't. 

 foss., p. 40. 



1855. Lycopodites. Goldenberg, Flora Sarapontana foss.. 

 Heft. I., p. 9. 



Descrijjtion. — Small herbaceous plants with whorled or spirally 

 arranged leaves. Sporangia placed in the axils of the leaves or 

 forming terminal cones. 



Bemarks. — The genus Lycopodites was first founded by 

 Brongniart in 1828, but subsequent investigations showed the 

 distinguished botanist that few of the plants included in it by 

 him had any affinity to the recent Lycopods, some of the included 

 i^pecies having eventually been shown to belong to the Coniferce. 



