MALVACEAE 131 



FAMILY 81. TILIACEAE Juss. 



Trees with alternate leaves and perfect flowers. Sepals and petals five 

 each, the latter imbricated in the bud. Stamens numerous. Ovary 1, 

 2-10-celled. Fruit 1-10-celled. 



1. TILIA L. 



Flowers yellowish, in axillary cymes, the base of the peduncle united 

 to a membranous bract. Petals bearing small scales at the base. Sta- 

 mens 5-delphous. Ovary 5-celled. Fruit indehiecent, 1-2-seeded. 



1. T. Americana L. BASS WOOD. 50-125 high : leaves obliquely 

 ovate, cordate at base, sharply serrate : flowers very fragrant. Common 

 throughout along streams. June-July. 



FAMILY 82. MALVACEAE Neck. 



Herbs or shrubs with alternate leaves and usually perfect flowers. 

 Sepals and petals five each, the latter convolute in the bud. Stamens 

 numerous, monadelphous, forming a column around the pistil and united 

 with the claws of the petals. Ovary several- celled, with 1-several ovules 

 in each cell. 



Seeds solitary in each cell. 

 Flowers pinkish. 



Carpels beakless. 1. MALVA. 



Carpels beaked. 2. CALLIRRHOE. 



Flowers yellow. 



Involucral bractlets present. 3. MALVASTRUM. 



Involucral bracts none. 4. SIDA. 



Seeds many in each cell. 



Involucels none. 5. ABUTILON. 



Involucels present. 6. HIBISCUS. 



1. MALVA L. 



Involucel bracts three. Column of stamens anther-bearing at the sum- 

 mit. Styles stigmatic on the inner side. 



Stems tall, erect. 



Leaf margins not wrinkled or crisped 1. M. sylvestris. 



Leaf margins crisped and wrinkled. 2. M. verticillata crispa. 



Stems procumbent. 3. M. rotundifolia. 



1. M. sylvestris L. HIGH MALLOW. 2-4 high : leaves cordate, 

 orbicular, sharply lobed and serrate : flowers axillary, 12 // -15 // broad, 

 pinkish. Rarely escaped in waste places. Independence, Sibley. July- 

 September. 



2. M. verticillata crispa L. CRISPED MALLOW. Like the last but 

 leaves crisped and flowers but 4 // -7 // broad. Waste [places. Indepen- 

 dence. Rare. July-September. 



3. M. rotundifolia L. CHEESES. Leaves orbicular- cor date, crenate, 

 often lobed, long-petioled : petals pinkish-white : flowers 4 // -7 // broad. 

 In waste places throughout but not common. May-October. 



