42 UNITED STATES AND MEXICAN BOUNDARY. 



LIMNaNTIIACE^. 



w 



LiMNANTHES DouGLAsii, R. Bt.; Tott. <^ Gray y FL 1, p. 200, Bcnicia^ California, March ; 



Tlmrher. 



ZYGOPHYLLACE^. 



f 



Larrea Mexicana, Movie; Torr. in Emory's Rep.yp. 138, t. 3; Giriy^ Gen. III. t. 147. Alu. - 

 the boundary line from the Eio Grande to California. 



PoRLiERA ANQUSTIFOLIA, Gray, PI. Wright. 2, p. 28. Guiacum angustifoliiim, Etujelm. Pltiir" 

 near Eagle Pass, Bigelotu, Deadman's Hole ; Parry. 



Fagonia Californica, -5ew^7i. Bot. Sulph.,p. 10.; Torr. in Pad/. B. R. Ex., Exjye. pi. G, p. 

 359, t. 1. Rocky and liill sides of tlie lower Colorado, California, February; Schott. 



Guiacum Coulteri, Gray, PI. Thurh. p. 312. Hills between Eayon and Ures, Sonora ; 

 l^hurher. 



Kali£TR(EMTA grandiflorAj Toi^r. in Gray, PI. Wright. 1, p. 26. Borders of the Eio G auuc 

 in western Texas ; Cbiliuahua and Sonora, July. Mr. Schott states that it is called 3Ial a^ > ' ' 

 by the Sonorians. 



Kallstrcemia maxima, Torr. d Gray, Fl 



Common alonsr the Rio Grande, f'^d 



throughout the Mexican States and southern Califor 



EUTACEiE. 



KoEBERLiNiA SPINOSA, Zucc. ; Gray, PI. Wright. l,p. 30, d 2, p. 20. Rich soils in v t'ous 

 places along the Rio Grande and in the Mexican States westward, May — August. "^ ^i 

 favorable situations this shrub sometimes attains the height of 8 or 10 feet." Thurler. 



Peganum Mexicanum. Gray, I. c. 1, p. 30, adnot. Low places near the Eagle mountains, 

 June ; Bigelotu. El Gallo, Chihuahua, November ; Thurler. 



Thamnosma Texanum. Eutosma Texanura, Gray, Gen. III. 2, p. 114, t. 155. Hills between 



nd 



O 



r river from El Paso down- 



Mountains ahout thirty-fiv' 



lens of the Rio Mimhres. Dr 



ward, and in western New Mexico, Sonora, etc, flowering throughout tl«3 season. 



Thamnosma MONTANUM, Torr. d Frem. in Frem. 2d 7?ep., p. 313. Sierra Tule, Sonora 

 Schott. San Felipe, California, May ; Thurher. 



AsTROPHYLLUM DUMOSUM, Torr. in Bot. Pope's Report, p. 161. 

 miles below El Paso, in Chihuahua, July (in fruit) ; Bigelow. Bon 

 Henry, United States army. Western slope of the Sierra del Pajarito, Sonora, July, (just past 

 flowering,) Schott, (not on the Eio Grande, as erroneously stated in the Botany of Captain Pope's 

 Eeport.) Since the description quoted above was written, other specimens of this remarkable 

 plant have been received, but none of them with perfect flowers. In one or two instances 

 withered, imperfect flowers were found, and we can now give a nearly complete character of the 



belon 



ASTROPHYLLUM. 



Calyx 4 — 5-sepalus, deciduus ; sepalis obtusis. Petala 4 — 5, obovata. Stamina 8 — 10. 

 Ovarium sessile, disco hypegyno 8 — 10-lobo insidens, 4 — 5-lobum, 4 — 5-loculare ; loculis 





