1898.] NATURAL SCIENCES OF PHILADELPHIA. 391 



90. Solanum bulbooastanum Dun. in Poir Encyc. Suppl., Ill, 749 ; Biol. Centr. 



Amer. Bot., II, 405. 



Pedregal, Aug. 22 (209). 



SCROPHTJLARIACE.aS. 



91. Pedicuiaris Mexicana Zucc. ex Bunge in Bull. Phys. Math. Acad. Petersb., I, 



(1843) 384; Biol. Centr. Amer. Bot., II, 467. 



Pedregal, Aug. 20 (184). 



92. Lamourouxia rhinanthifolia H. B. & K, Nov. Gen. et Sp., II, 337, t. 169 ; 



Biol. Centr. Amer. Bot., II, 466. 



Collected in quite a number of places through Mexico. Pedre- 

 gal, Aug. 22 (193). 



ACANTHACE^J. 



93. Calophanes decumbens A. Gr. Syn. Fl. N. Am., II, i, 325 ; Biol. Centr. Amer. 



Bot. II, 502. 



From Texas, Arizona to the Valley of Mexico. Pedregal, Aug. 

 22 (200). 



94. Ruellia sp. 



On hills above pedregal near Tlalpam, Aug. 22 (205). 



COMPOSITE. 



95. Tagetes lucifer Cav. Ic, III, 33, t. 264; Biol. Centr. Amer. Bot., II, 222; DC. 



Prodr. V, 643 ; Bot. Mag., t. 740. 



Extending from Texas through North to South Mexico. Col- 

 lected by Bourgeau in pedregal. " Pericon." pedregal, Aug. 20 

 (192). 



96. Dahlia coccinea Cav. Ic, III, 33, t. 266 ; Bot. Mag., t. 762 ; Biol. Centr. Amer. 



Bot., II, 196. 



Collected by Bourgeau in the Valley of Mexico. This plant has 

 a northerly and extensive distribution. " From the Cordilleras of 

 Chihuahua, within 200 miles of the United States boundary, it 

 ranges southward through the mountains to Jalisco and the Valley 

 of Mexico. It shows a remarkable variation in color from cardinal 

 of several shades, through scarlet, scarlet-orange, mandarin, orange, 

 lemon-yellow, yellow. The so-called scarlet-orange rays are scarlet 

 with lines of yellow running through, so that the strap-shaped 

 corolla has a somewhat banded appearance. The ligulate corolla is 

 about an inch long and half an inch broad. The entire head varies 

 in size from two inches in the cardinal ones to three inches in the 

 scarlet-orange." (See my article " The Native Dahlias of Mexico," 

 Science n. s. VI, 909, Dec. 17, 1897). 



Pedregal near Tlalpam, Aug. 20 (160). 



