' .. • THE MARYLAND CYCAnS. 471 



the walls, concentrically arr;inf2;e(l in ji:i()iii)s of thin, crescent-shaped scars, 

 which are always somewhat depressed and contain the bases of the scales; 

 essential organs visible at the center of the best preserved spadices, but 

 often wanting and rej)resentecl by a cavity; armor o cm. thick; woody 

 cylinder consisting of two layers or rings, the outer, or cortical parenchyma 

 2 cm. thick, open and loose in structure, the large vascular strands passing 

 upward and outwanl through it to enter the leaf bases, whei-e they sud- 

 denly arch over and assume the dowuwaid couise of the leaves, the 

 inner or fibrous zone, 5 mm. thick, \evy distinct from the outer, the 

 strands I'ising from its outer surface and not penetrating it, its fibers 

 Ijeing longitudinal, its inner walls showing the longitudinal rows of the 

 alternating ovate scales of the medullary rays; medulla represented in 

 the only specimen known by a narrow l)and 5 nun. thick of rough, dark, 

 crystalline rock substance with peculiar plates of a finer white rock cross- 

 ing it in the form of dikes. 



This species is thus fai' known only l)y the thin slab, W. C., B., No. 

 6345, called the Hegeman trunk from Stemmers Rvm, being almost the 

 only cycad from any point east of the meridian of Baltimore. Although 

 so incomplete a part of the entire trunk, still it contains the greater part 

 of the specific characters, and constitutes one of the most distinct species 

 of the genus known. It is also one of the most beautiful of cycads, and 

 it gives me great pleasure to name the species in honor of the late Mrs. 

 Mary Fisher (ioucher, nee Mary Fisher, who was largel}' instrumental in 

 the establishment and de^•elopment of the Woman's College, and thereby 

 to help perpetuate one of the finest names in the history of the city of 

 Baltimore. 



PI. LXXXVII, Fig. in, 9 shows well the relative size and general 

 appearance of the specimen. 



PI. CV pre.sents the outer surfaces. It is from a photograph made 

 by the Woman's College of Baltimore, and clearly brings out most of the 

 characters of the species. This specimen consists of a slab from the flat 

 side of a trunk of conical shape. It is convex on the outer and concave 

 on the inner surface, with indications that the trunk was hollow before 

 entombment. It extends from the base to near the summit, and is 28 cm. 

 high, 19 cm. wide Ijelow, and 14 cm. above. The specimen weighs 2.83 kg. 

 (Locality: PI. LXXX, No. 42.) 



