69 



This most common of all Opuntias is plentiful throughout southern 

 and central Texas. At some places between Waco and Kenedy, hun- 

 dreds of plants can be seen from the car windows. About Corpus 

 Christi the plants are usually large, and scattered in growth. 



April 14 (1574): type locality, Mexico. 

 Opuntia Rafinesquii stenochila Engelm. Whipple's Exped. 43 



(1856.) 



In rich ground at Kerrville, altitude 1650-1700 feet. Flowers open 

 widest during the middle of the day ; pale yellow, with a reddish centre. 

 Plants low. 



May 15 (1749)- 



LYTHRACEAE. 



AMMANNIA L. Sp. PL 119 (1753). 

 Ammannia auriculata Willd. Hort. Berol. 7, /. 7 (1806). 



Ammannia Wrightii A. Gray, PL Wright. 2: 55 (1853). 

 In moist, rich black land, at Corpus Christi, on the edge of a water 

 hole, altitude 40 feet. Plants small, 3-6 inches high. 

 June 5 (1821). 



Ammannia coccinea Rottb. PL Hort. Havan. Descr. 7 (1773). 

 Ammannia latifolia T. & G. Fl. N. A. i : 480 (1840), not L. 



On the right bank of the Guadalupe at Kerrville, growing in mud and 

 water. 



June 28 (1925). 



LYTHRUM L. Sp. PL 446 (1753). 

 Lythrum alatam Pursh, FL Am. Sept. 334 (1814). 



About Corpus Christi, usually in moist ground, altitude 40 feet, and 

 at Kerrville along the Guadalupe, altitude 1600 feet, where it was much 

 taller, more erect and slender. Distributed as L. lanceolatum Ell. 



March 27 (1506); type locality, "in lower Georgia." 



Lythrum ovalifolium Engelm. ; A. Gray, Bost. Jour. Nat. Hist. 6 : 

 187 (1850). 



Lythrum alatum var. ovalifolium A. Gray, Bost. Jour. Nat. Hist. 



6: 187 (1850). 



On the right bank of the Guadalupe at Kerrville, growing in low, wet 

 ground, altitude 1600 feet. 



June 19 (1885); type locality, " springs of the Pierdenales on rocks 

 covered by water. ' ' 



