350 Lake Maxinkuckee, Physical and Biological Survey 

 Family 85. Rutace^e. Rue Family 



474. PRICKLY ASH 



ZANTHOXYLUM AMERICANUM Mill. 



Not common; a small thicket south of the lake in Farrar's 

 woods. 



475. HOP-TREE; THREE-LEAVED HOP-TREE 



PTELEA TRIFOLIATA L. 



Not common ; a few plants noted down the outlet of Lost Lake, 

 not a great way above the Tippecanoe River, and some by a wood- 

 land swamp near Busart's field. Common at Plymouth where it 

 is infested by a very peculiar-looking leaf-hopper which lays its 

 eggs on the petiole of the leaves. Seed with a peculiar fragrance. 

 The flat disk-like fruit, papery in texture, remains on the bush 

 nearly all winter, giving the bush a peculiar attractiveness when 

 nearly everything else is barren. 



Family 86. Simaroubace^e. Ailanthus Family 

 476. tree-of-heaven 



AILANTHUS GLANDULOSA Desf. 



Several young trees along the road on the east side of the lake. 

 Quite persistent where planted, sending up shoots from the roots 

 and spreading widely by seed. Some of the trees which have 

 scarlet samaras are quite ornamental in fruit. The winged twisted 

 seed acts like a boomerang and on being flipped away partly or 

 wholly returns. 



Family 87. Polygalace^e. Milkwort Family 

 477. cross-leaved or marsh milkwort 



POLYGALA CRUCIATA L. 



Not common; found in the marsh east of Lost Lake, back of 

 Green's field. 



478. WHORLED MILKWORT 



POLYGALA VERTICILLATA L. 



Rare; found in dry ground, in open places. 



479. FIELD OR PURPLE MILKWORT 



POLYGALA VIRIDESCENS L. 



Rather common in moist sandy soil southwest of the lake, along 

 the railroad in the vicinity of the birch swamp. Noted in flower 

 from July 21 till September 29, the handsome head of flowers re- 



