7 8 FLORA OF MISSOURI. 



1281. nigra, L. Black Walnut- 



Common. 



1282. Carya alba, Nutt. Shell-bark Hickory. 



Common. 



1283. amara, Nutt. Bitter-nut Hickory. 



Common. 



1284. aquatica, Nutt. 



Butler and common in low lands Southeast, (Letter- 

 man). 



1285. olivaeformis, Nutt. Pecan. 



Common along rivers except in Northwest. 



1286. porcina, Nutt. Pig-nut Hickory. 



Common. 



1287. sulcata, Nutt. Large Shell-bark Hickory. 



Common along streams. 



1288. tomentosa, Nutt. Mockernut. 



Common except West and Northwest. 



? From four localities in the State I have received nuts 



which are apparently from a hybrid of C. alba and C. 

 olivaeformis. They are certainly different from any 

 recognized species, but more study is necessary to 

 determine their true relationship. (Tracy). 



CUPULIFERJE. 

 Oak Family. 



1289. Quercus alba, L. White Oak. 



Common except West of the Nodaway River. 



1290. aquatica, Catesby. Water Oak. 



Common Southeast. 



1291. bicolor, Willd. Swamp White Oak. 



Common except in extreme Northwest. 



1292. Catesbaei, Michx. 



"Missouri," (Engelmann). 



1293. cinerea, Michx. Upland Willow Oak. 



(Swallow in Geol. Survey Rep.) 



1294. coccinea, Wang. Scarlet Oak. 



Common. 



1295. falcata, Michx. Spanish Oak. 



Common Southward. 



