59 



Prevailing number of leaflets 5; fruit usually smooth and 

 tapering at base to a short stem (fig-like) ; shell of nut 

 thick, kernel sweet and astringent 6 C. glabra. 



Prevailing number of leaflets generally 7; fruit usually 

 granular, rarely tapering at the base to a short stem 

 (fig-like); shell of nut thin, kernel sweet without 



astringency 7 C . ovalis. 



Branchlets and leaves densely covered when they first 



appear with rusty-brown pubescence 8 C. Buckleyi. 



1. Carya illinoensis (Wangenheim) K. Koch. PECAN. Plate 22. 

 Very tall slender trees up to 15 dm. in diameter; bark tight, sometimes 

 becoming scaly on very old trees, fissured, ridges narrow, ashy-brown 

 tinged with red; twigs at first hairy, becoming smooth or nearly so and 

 reddish-brown by the end of the season; leaves 3-5 dm. long; leaflets 

 9-17, ovate to oblong-lanceolate, somewhat curved backward, 7-15 

 cm. long, taper-pointed, hairy when they unfold, becoming at maturity 

 smooth or nearly so, dark green above, and a yellow-green beneath; 

 clusters of staminate catkins sessile; fruit single or in small clusters, 

 oblong 3.5-6 cm. long, the winged sutures extending to the base, the husk 

 splitting to below the middle; nut ovoid-oblong, reddish-brown; wood 

 heavy, hard and not strong. 



Distribution. In the Mississippi Valley from Indiana and Iowa 

 south to Texas. In Indiana it was a native of the southwest part 

 of the State. It was a common tree in the river bottoms of Point 

 Township of Posey County, and in the bottoms of the southwest part 

 of Gibson County. It was found more or less frequently in the bottoms 

 of the Wabash Valley, as far north as to within four miles of Covington 

 where the author collected specimens in 1918. It followed the bot- 

 toms of the Ohio River east at least as far as Clark County. Michaux 1 

 gives it as rare in the vicinity of Louisville. Victor Lyons of Jefferson- 

 ville says that it was a native to the east part of Survey 29 of the Illinois 

 Grant, and one tree in the north-west corner of No. 32; and there were 

 nine trees 9-10 dm. in diameter in Floyd County on "Loop Island". 

 A large tree grew in the bottoms near Bethlehem in Clark County, which 

 is said to have been a native. 



Young 2 says that there are two trees in Jefferson County, one planted, 

 the other probably native. Coulter 3 says "there are several trees in the 

 river bottoms." 



There are several trees on the Elisha Golay farm about one mile 

 east of Vevay which are in rows, which show that they were planted. 

 The largest has a trunk 2.2 m. long and a circumference of 31 dm. 



tAndre Michaux's Travels 1793-1796. 



'Flora of Jefferson County. Ind. Geol. Surv. Kept. 2:283:1871. 



'Flora of Jefferson County. Ind. Geol. Surv. Kept. 6:265:1875. 



