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-ceIled. 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-oelled. Fruit indehiscent, 1-2-seeded. 



1. T. Americana L. Basswood. 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. 



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

 mit. Styles stigmatic on the inner side. 



Stems tall, erect. 



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



Leaf margins crisped and wrinkled. 2. Jf. verticillaia 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"-1&''' broad, 

 pinkish. — Earely escaped in waste places. Independence, Sibley. July- 

 September. 



2. M. verticillata ciispa L. Ceispbd Mallow. Like the last but 

 leaves crisped and flowers but V-l" broad. — Waste [places. Indepen- 

 dence. Bare. July-September. 



3. M. rotundifolia L. Cheeses. Leaves orbicular-cordate, orenate, 

 often lobed, long-petioled : petals pinkish-white : flowers ^'-t" broad. 

 — In waste places throughout hut not common. May-October. 



