60 TILIACE.E. 



1. A. AvicenNjE, Gaertn. Indian Mallow. Velvet Leaf. 



Leaves roundish-heartrshaped, acuminate, dentate, velvety-tomentose ; pedut* 

 da shorter than the leaf-stalks, solitary ; carpels about 15, 3-seeded, beaked, tb* 

 beaks splitting in two. 



Waste grounds. Introduced from India; naturalized. Annual. July, August. 

 Stem 3 to 5 feet high, with spreading branches. Flowers in the axils of the leaver 

 t>range-yellow, near 1 inch in diameter. 



5. SIDA. Linn. 



Calyx 5-cleft, without an involucel. Styles 5 or more, 

 the ripe fruit separating into as many 1-seeded carpels, each 

 splitting open at the top, arranged circularly. 



1. Flowers perfect. Stigmas terminal, minutely capitate. 



1. S. SPINOSA, L. Prickly Sida. 



Stem rigid, branched from the base, minutely pubescent ; leaves ovate-laneeolala, 

 ♦oothed, with the tubercles at the base spiny; pedicels axillary, solitary, shorter 

 than the Btipules and petioles ; fruit separating into five 2-beaked carpels, opening 

 between the beakB. 



Waste places, roadsides ; common. July and August. Annual. Plant bushy, 

 1 to 2 feet high. Leaves 1 inch long and % as wide, mostly obtuse at each end. 

 Pttals obovate, yellow, of short duration. 



2. S. Napjea, Willd. Smooth Sida. 



Stem slender, smooth ; leaves palmately 5-lobed, smooth ; lobes oblong-linear, acn- 

 minate, coarsely toothed ; carpels 10, acuminate, awnless. 



Shaded rocky places; rare. July. Per. Stems angular, 3 to 5 feet high. Leavu 

 on short petioles, cordate ; lobes 2 to 4 inches long, % to % wide. Floral leave* 

 much smaller. Peduncles axillary and terminal, long and slender, somewhat 

 leafy, the divisions somewhat 4-flowered. Flowers nearly 3^ inch in diameter. 

 Petals white, twice as long as the calyx. 



2. NaPjEA. Clayton. Flowers dioecious : sAles stigmatic along the inside. 



3. S. DioiCA, Willd. Dioecious Sida. 



Leaves palmately 7 to 9 lobed ; lobes lanceolate, incisely toothed ; peduncles many- 

 flowered, bracteate, sub-corymbed ; staminate flowers entirely destitute of pistils ; 

 the fertile with a short column of filaments but no anthers; carpels 8 to 10, point- 

 leas in a roundish depressed head. 



Stony grounds ; not common. July — Sept. Per. A tall and roughi6h herb, 4 

 to 5 feet high, with very large 7 to 9-parted lower leaves, with the pointed lobe* 

 pinnatifid cut and toothed, and 6mall white flowers in panicled clustered co- 

 rymbs. 



Order 23. TILIACE2E— Linden Family. 



7V«6T or shrubs, with simple, stipulate, alternate leaves and ariUary flowers, usually 

 perfect. Sepals 4 to 5, deciduous, valvate. Petals 4 to 5, entire, hypogynous, 

 rarely wanting, imbricated in the bud. Stamens numerous, usually polydelphous ; 

 AJTTHBRS 2 celled. Disk often with 4 to 5 glands at the base of the petals. Ovabt 

 of 2 to 10 united carpels ; styles 1 ; stigmas as many as the carpels. Fbuit capro- 

 tar, 2 to 5 celled ; seeds solitary or numerous, with fleshy albumen. 



