382 PROCEEDINGS OF THE ACADEMY OF [1898. 



POLEMONIACEJE. 



24. Cobaea scandens Cav. Ic, I, 11, t. 16, 17; Biol. Centr. Amer. Bot, II, 358; Bot. 



Mag., t. 851 ; Flore des Serres, t. 1,467. 



Walls of gardens. Tlalpam, Aug. 20 (148). 



LABIATE. 



25. Salvia Mexicana Linn. Sp. PL, 25; DC. Prodi-., XII, 337; Biol. Centr. Amer. 



Bot., II, 361 ; Cav. Ic, I, p. 16. t. 26. 



Reported from a number of localities in North and South Mex- 

 ico. Tlalpam, Aug. 22 (222). 



26. Salvia amarissima Orteg. Hort. Matr., Dec. 4; DC. Prodr., XII, 317; Bot. 



Reg., t. 347 ; Biol. Centr. Amer. Bot., II, 553. 



Reported from several localities in Mexico. The specimens col- 

 lected in 1896 are doubtfully referred to this species, differing in 

 several respects, notably the rough hairs and long petioles from the 

 plant so named in the herbarium of the Academy of Natural Sci- 

 ences. It may be a variety, which I here propose, as variety petio- 

 laris n. var. Tlalpam, Aug. 22 (223). 



SOLANACE.SI. 



27. Solanum Cervantesii Lag. Gen. et Sp., Nov. 10 ; Biol. Cent. Am. Bot., II, 406. 



North and South Mexico. Roadsides near Tlalpam, Aug. 15 

 (83). 



28. Solarium nigrum L., var. villosum Mill. S. nigrum Linn. Sp. PI., 186 ; Biol. 



Centr. Amer. Bot., II, 412. 



This species is a common weed in nearly all tropical and temper- 

 ate countries, hut it is impossible to determine where it is really in- 

 digenous (Hemsley). Tlalpam (154). 



29. Solanum cornutum Lam. Illustr., II, 25 ; DC. Prodr., XIII, i, 328 ; Jacq. 



Eclog., t. 104; Biol. Centr. Amer. Bot., II, 407. 



North and South Mexico. Tlalpam, Aug. 20 (180). Asa Gray 

 distinguishes S. cornutum by its simple, non-stellate hairs, otherwise 

 it is much like S. roslratwm from Colorado. 



30. Nicotiana glauoa R. Grah. in Edinb. N. Phil. Journ. (Apr.-June, 1828) 175 ; 



Bot. Mag., t. 2,837 ; DC. Prodr., XIII, i, 562; Biol. Centr. Amer. Bot., II, 434. 



" This quickly growing arborescent species can be raised on mere 

 sand on the coast, as one of the best plants to establish shelter and 

 stay the shifting of the sand waves. There the poisonous quality of 

 its foliage is not objectionable. It is inadmissible to pastural places 

 on account of its deleteriousness " (Von Mueller). North and 



