1234 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



5. Ileliotropium fruticosum L. Syst. Nat. ed. 10. 913. 1759. 



Sonora to Veracruz, Yucatan, and Oaxaca. West Indies; Central and 

 ooutli America. 



Plants fruticose or suffrutescent, usually 60 cm. high or less, canescent- 

 strigose; leaves linear to narrowly lanceolate, 1.5 to 5 cm. long; corolla white, 

 about 5 mm. lon^'. " Hierba de la mula " (Sinaloa) ; " hierba del loro " (El 

 Salvador). 



A decoction of the plant is employed in Sinaloa as a remedy for fevers. 



6. Heliotropium parviflorum L. Mant. PI. 2: 201. 1771. 



Baja California and Sinaloa to Coahuila, Tamaulipas, Veracruz, Yucatan, and 

 Puebla. Florida ; West Indies ; Central and South America. 



Plants chiefly herbaceous but often suffrutescent below, 1 meter high or 

 less, green, sparsely hirsute or hirtellous ; leaves lanceolate to ovate, 3 to 10 

 cm. long, obtuse or acute, petiolate ; spikes usually much elongate ; corolla 

 white, 2 mm. long or less, " Rabo de mico," " nemax " (Yucatan) ; " borraja " 

 (El Salvador) ; " flor de alacr&,n " (Guatemala). 



In Yucatan the plant is used as a remedy for nosebleed, diseases of the 

 gums, and dysentery. 



7. Heliotropium jaliscense Macbride, Proc. Amer. Acad. 51: 542. 1916. 

 Jalisco to Oaxaca ; type from San SebastiS.n, Jalisco. 



Plants fruticose or suffrutescent, green ; leaves petiolate, lanceolate or 

 lance-oblong, 5 to 10 cm. long, hispidulous ; corolla 3.5 to 4 mm. long ; fruit 

 glabrous. 



8. Heliotropium coriaceum Lehm. Act. Nov. Nat. Cur. 142; SIO. 1829. 

 Chiapas. 



Plants erect, fruticose; leaves short-petiolate or sessile, lance-oblong, 1.5 to 

 4.5 cm. long, acute, hispidulous above ; corolla white, about 5 mm. long. 



9. Heliotropium pueblense Standi., sp. nov. 



Puebla; type from Tehuacdn (Rose, Painter d Rose 9979; U. S. Nat. Herb, 

 no. 453474). 



Erect shrub ; leaves linear or oblong-linear, subsessile, 6 to 20 mm. long, 

 acute or obtuse, densely cinereous-strigose, the margins strongly revolute; 

 peduncles 12 mm. long or less, bifid, the spikes few-flowered, less than 1 cm. 

 long, the flowers sessile; calyx lobes lance-oblong, 1.5 mm. long, acute; corolla 

 2 to 2.5 mm. long, densely strigose outside. 



Purims 6502 from Tehuacan belongs to this species. 



10. Heliotropium calcicola Fernald, Proc. Amer. Acad. 43: 62. 1907. 

 Heliotropium petraeum T. S. Brandeg. Univ. Calif. Publ. Bot. 4: 384. 1913. 

 Guerrero to Tamaulipas and Veracruz ; type from Iguala Canyon, Guerrero, 



altitude 750 meters. 



Shrub, 0.5 to 1.2 meters high ; leaves subsessile, 2 to 6 cm. long, obtuse or 

 acute, silvery-sericeous or strigose, more densely so beneath ; branches of the 

 cyme short or elongate; corolla white, 2 to 2.5 mm. long. 



DOUBTFUL GENERA. 



Rhahdia lycioides Mart. (=Rotul^i aquatica Lour.) is reported from Oaxaca 

 by Hemsley. No North American specimens have been seen by the writer. 



146. VERBENACEAE. Vervain Family. 



Shrubs or trees, sometimes herbs ; leaves usually opposite or verticillate. 

 simple or digitately compound, estipulate; flowers perfect, usually irregular; 

 calyx inferior, persistent, campanulate or tubular, 4 or 5-lobate or dentate; 



