112 American Midland Naturalist Monograph No. 2 



Wabash R., northw. to Lawrence Co., and the Mississippi valky 



northw. to Adams Co. [C. missis sippiensis Bosc] Sugarberry 



C. laevigata Willd. 



2. Leaves ovate, short-acuminate, usually rounded or subcordate at base; 

 fruiting pedicels about as long as the petioles; drupes 6-8 mm. in diam- 

 eter; shrub or small tree to 4 m. tall; sand dunes or rocky banks of 



streams, rare and local. Dwarf Hackberry 



C. pumila (Muhl.) Pursh 



44. Moraceae DC. — Mulberry Family 



I . Leaves serrate or lobed, 3-vemed at base; branches never spiny; flowers in spikes 

 1. Morus 



L Leaves entire, pinnately veined; branches usually spiny; staminate flowers in loose 

 racemes, the pistillate in globose heads; fruit large, globose, yellowish green. 8-12 

 cm. in diameter 2. Madura 



1. MoRUS L. — Mulberry 



1 . Leaves becom.ing scabrous above, the lower surface pubescent, or hispidulous 

 along the veins; lateral lobes, if present, caudate; buds somewhat diver- 

 gent, acute; fruit reddish purple, 2 cm. or more in length; native tree; 

 woods, common. May-June. Red Mulberry M. rubra L. 



1. Leaves glabrous, somewhat glossy and nearly smooth above; lower surface 



glabrous or nearly so, except on the veins or in their axils; lateral lobes 



usually obtuse; native of Asia. 



2. Fruit whitish or pinkish, 1-1.5 cm. long; cult., and rarely escaped. May. 



White Mulberry M. alba L. 



2. Fruit dark red, smaller; a small bushy tree; leaves commonly much lobed; 

 along fences and in woods, common. [M. alba var. tatarica (L.) Ser.} 

 M. tatarica L. 



2. Maclura Nutt. 



M. pomifera (Raf.) Schneid. Osage-orange. Hedge-apple. Commonly 

 planted for fences and windbreaks, sometimes spontaneous; native from Va. 

 to Kans., and southw. M.iy-June. 



45. Cannabinaceae Lindl. — Hemp Family 



1. Erect herbs; pistillate flowers in spikes ..1. Cannabis 



1 . Stems twining; flowers in catkin-like drooping clusters (hops) 2. Hutnulus 



1. Cannabis L. — Hemp 



C. sativa L. Common Hemp. Marijuana. Moist soil, edges of fields, along 

 roads, waste ground, locally common; nat. from Asia. July-Sept. 



2. HiJMULus L. — Hop 



H. americanus Nutt. Ainerican Hop. Sandy soil at edges of woods and 

 along fences, coinmon. Aug. fW. lupulus sensu auth., non L.] 



