(98) 



In dry soil, sand or gravel, Virginia and South Dakota to 

 Florida and Texas. 



2. Morongia angustata (T. & G.) Britton. 



Schrankia angustata T. & G. Fl. N. Am. i : 400. 1840. 

 Morongia angustata Britton, Mem. Torr. Club, 5 : I 9 I « 

 1894. 



In dry soil, Virginia to Tennessee, Texas and Florida. 



3. Morongia latidens. 



Perennial, bright green. Stems 3-10 dm. long, with con- 

 spicuously pale and sharp angles and still paler prickles : 

 leaves with 4 pinnae or rarely some of them with only 2 

 pinnae; leaflets thick, oblong, 3-8 mm. long, apiculate, not 

 nerved : peduncles much stouter than the petioles, with few 

 pale prickles : pod stout, 3-7 cm. long, the sides with broad 

 prickles, the broad margins scarcely or only slightly armed ; 

 beak 1— 1.5 cm. long. 



In dry soil, Kenedy, Carnes County, Texas. Type, Hel- 

 ler, PI. So. Texas, no. 1779, in the herbarium of Columbia 

 University. 



4. Morongia Roemeriana (Scheele) Heller. 



Schrankia Roemeriana Scheele, Linnaea, 21 : 456. 1848. 

 Morongia Roemeriana Heller, Cont. F. & M. Coll. I : 44. 

 1895. 



In stony soil, Texas. 



11. MIMOSA L. Sp. PI. 516. 1753. 



Stamens as many as the corolla-lobes. 1. M. pudica. 



Stamens twice as many as the corolla-lobes. 

 Shrubs or trees with hard wood. 



Branchlets and petioles or their divisions glabrous. 



Leaves usually with 2 pinnae ; leaflets 6-io, oval or orbicular- 

 oval, 2-4 mm. long : pods armed. 2. M. boreal is. 

 Leaves usually with 4-6 piunae ; leaflets usually 12, oblong or 

 oblong-obovate, 4-6 mm. long : pods unarmed or nearly so. 



3. M. fvagrans. 

 Branches and petioles or their divisions puberulent or pubescent. 



Leaves with 2-4 or rarely 6 piunae ; leaflets 4-12. 



4. M. Texan a. 



