no MORACEAE 



la. B. cylindrica scabra Porter. (Man. p. 343.) Northampton; 

 Lancaster ; Bedford ; Crawford ; Erie. 



5. PARIETARIA L. 

 1. Parietaria Pennsylvanica Muhl. Penns\t:^vania PelliTory. 

 (Mau. p. 343 ; I. F. f. i2jo.) On dry rocks and banks, Ont. to B. C, 

 Fla., Colo, and Mex. — Pennsylvania: Bucks; Lancaster; Franklin; 

 Chester. 



Family 2. CANNABINACEAE Lindl. Hop or Hemp Family. 



Stems twining : leaf-blades usually 3-lobed : fruit a drooping: cone with thin 

 imbricated bracts. i. Humulus. 



Stems erect : leaf-blades 3-7-parted : fruit spicate on stiff branches. 



2. Cannabis. 



1. HUMULUS L. 



1. Humulus Lupulus L. Hop. (Man. p. 341 ; I. F. f. 1261.) In 

 thickets and on river banks, N. S. to Man., Pa., in the Alleghenies to 

 Ga.; to Kans., and in the Rocky Mts. to Ariz, and N. Mex.— /V«w5j'/- 

 vania : Northampton ; Lancaster ; Erie ; York ; Chester ; Dela- 

 ware ; Allegheny. 



2. CANNABIS L. 



1. Cannabis sativa L. Hemp. (Man. p. 341; I. F. /. 1262.) In 

 waste places, N. B. to Minn., N. C, Tenn. and Kans. — Pennsylvania : 

 Northampton ; Franklin ; Lancaster ; Chester ; Allegheny. 



Family 3. MORACEAE Lindl. Mulberry Family. 



Staminate and pistillate flowers in ament-like spikes. i. Morus. 



Staminate flowers in araent-like racemes: pistillate flowers in heads. 



Plants armed ; leaves entire. 2. Toxylon. 



Plants unarmed ; leaves serrate and often lobed. 3. Broussonetia. 



1. MORUS L. 



Leaf-blades softly pubescent beneath : fruit deep red or purplish, i. Hf. rubra. 

 Leaf-blades glabrous or slightly hairy on the nerves beneath : fruit white or 

 pinkish. 2. M. alba. 



1. Morus rubra L. RED Mulberry. (Man. p. 340 ; I. F. /. /.?J7. ) 

 In rich soil, Vt. to S. Dak., south to Fla. and Tex. — Pennsylvania : 

 Northampton ; Lancaster ; Franklin ; Allegheny ; Cambria ; 

 Chester ; Delaware. 



2. Moms alba L. White Mulberry. (Man. p. 340; I. F. /. I2j8.) 

 In woods or waste places. Me. and Ont. to Fla. Introduced from the Old 

 World. — Pennsylvania : Northampton; Lancaster; Columbia; 

 Franklin ; Philadelphia ; Chester ; Del-^-ware ; Allegheny. 



2. TOXYLON Raf. 

 1. Toxylon pomiferum Raf. Osage Orange. (Man. p. 340; I. 'F./. 

 I2^g. ) In rich soil, Mo. and Kans. to Tex. — Pennsylvania : Delaware. 



