FLORA OF THE GREEN RIVER GROUP. 1 78 



near the rounded apex, where they are more than li centimeters broad 

 and of the same length. This form is related to Gtetonia membranosa, 

 Goepp.. "Schoss. FL," p. 38, pi. xxv, fig. 12, whose sepals are united to the 

 middle and whose areolation is different. The size is the same. 

 Hdh. — Florissant. Princeton Museum, No. 650. 



Poraiia tenuis, sp. nov. 



Calyx large, thin; sepals distinct to the base, oblong, obtuse; veins distinct, 

 distantly obliquely branched. 



Resembles P. macrantha, Ludw., "Palaeontogr," viii, p. 116. pi. xli. 

 fig. 18, but its sepals are still longer — more than 1* centimeters long, and 

 narrower, half a centimeter. The ramifications of the veins are much 

 more distinct. 



Hah. — Florissant. Lacoe's Cabinet, Nos. 65 and 71. 



MYRSINE^E. 



MYRSINE, Linn. 

 M y r s i n e latifolia, sp. nov. 



Plate XXXVIII, Fig. 16. 



Leaf subcoriaceous, broadly oval or nearly round, truncate at base, very entire; 

 nervation carnptodrome. 



The leaf, 2 centimeters long and as broad, is broken at the base and 

 the top, and therefore the mode of attachment to the petiole is not seen. 

 The nervation is, however, so much like that of species of this genus that 

 its reference to it seems legitimate. The open, opposite, slightly curving, 

 secondary nerves fork two or three times, and are divided toward the 

 borders, where they abruptly curve and follow close to the margins in short 

 anastomosing bows. The areas between the secondary nerves are obliquely 

 crossed by branching nervilles constituting a loose polygonal areolation. 



The affinity of this leaf as to its form and size is with M. antigua, Ung., 

 •'Syllog.,*' p. 20, pi. vii, figs. 7, lb. The European leaf is a little larger 

 and the secondary nerves also a little more curved; the areolation is of 

 the same type. The leaf appears to be unequilateral. and in this and 

 size it is comparable to M. Chamcedrys, Ung., "FL v. Sotzka," p. 42. pi. 

 xxii, figs. 4, 5. The type of nervation of the American species is that of 

 M. bifaria, Wall., of India. 



