106 KANSAS ACADEMY OF ISCIENCE. 



( Order Platanacese.) 

 30. Platanus. Sycamoeb. 



46. P. occidentalis, L.; Sycamore, Buttonwood. A large tree; wood light, soft, close- 



grained; bark (at least of branches) white, detached annually in thin plates; 

 Ivs. mostly truncate at base, sinuate-lobed or toothed. 



(Order Jiiglandaeese.) 

 31. JuGLANS. Walnut. 



47. J. cinerea, L.; Butternut, White Walnut. 50°-100° high; wood light, soft; Ifts. 



15-17, oblong-lanceolate; fr. oblong, clammy, pointed; the nut deeply sculp- 

 tured and rough, with ragged ridges. 



48. J. nigra,li.; Black Walnut. 90°-140° high; wood heavy, hard; Ifts. 15-21, ovate- 



lanceolate; fr. spherical, roughly dotted, nut corrugated. 



32. Cabta. Hickoey. 



Lfts. 13-15, scythe-shaped; nut oblong, thin-shelled, sweet (49). 

 Lfts. 7-11; nut with a tender shell and bitter kernel (a). 

 Lfts. 5-9; nut roundish, hard-shelled, sweet (6). 

 a. Lfts. sharply serrate; nut globular, white; Ivs. nearly smooth (.54). 

 a. Lfts. subentire; nut angular, reddish; Ivs. shining green both sides (55). 



b. Valves of the epicarp distinct to the base; bark with loose plates (c). 

 6. Valves of the epicarp united below; bark continuous, firm [d). 

 c. Lfts. 5; shell thin (50). 

 c. Lfts. 7-9; shell very thick (51). 



d. Lfts. 7-9, obscurely-serrate or entire, rough downy beneath (52). 

 d. Lfts. 5-7, serrate, nearly glabrous (53). 



49. C.oliva'.formis, Nutt.; Pecan-nut. 90°-160° high; wood heavy, hard, brittle; lfts. 



oblong-lanceolate, 13-15, serrate, scythe-shaped. Nut thin-shelled, olive-shaped. 



50. C.aiba, Nutt.; Shagbark or Shellbark Hickory. (i0°-140° high; bark exfoliating, 



that is, shaggy; wood heavy, hard, strong, tough; lfts. 5, lower pair much 

 smaller; nut white; flattish-globular, shell thinnish. 



51. C. sulcata, Nutt.; Big Shellbark. 60°-95° high; bark shaggy; wood heavy, hard, 



strong and tough; lfts. 7-9, downy underneath; fr. oval or ovate, 4-ribbed above 

 the middle; husk very thick; nut large (lj^-2^ long), dull white, thick-waUed. 



62. C. tomentosa, Nutt.; Black Hickory, Bull-nut, King-nut. Bark close, rough, but 

 not shaggy; wood very hard, heavy, strong, tough; shoots tomentose when 

 young. Lfts. 7-9, lance-obovate. Husk very thick and hard; nut 4-ridged 

 towards the summit, brownish; 1'' in diameter, or smaller. 



53. C. 2}orcina, Nutt.; Pignut, Black Hickory. Large tree; bark not exfoliating; 



wood heavy, hard, very strong; lfts. 5-7, serrate, nearly glabrous; nut oblong 

 or oval, li^-2^ long; shell bony, thick. 



54. C amara, Nutt.; Bitter-nut, Swamp Hickory. .50°-80° high; bark not exfoliat- 



ing; wood heavy, hard, tough; shoots and Ivs. more or less pubescent, becom- 

 ing almost glabrous. Lfts. 7-11, oblong-lanceolate, or lanceolate; fr. globular, 

 6-ridged; nut white, bitter, thin-walled, barely 1' long. 



55. C. a.quafica,'ii\itt.; Water Hickory, Bitter Pecan. .50°-()5° high; wood heavy, soft, 



strong, rather brittle. Lfts. about 11, lanceolate, almost entire, shining green 

 on both sides; nut small, reddish, shell very tender, kernel bitter. 



