WOOTON AND STANDLEY — FLORA OF NEW MEXICO. 537 



Range: Western Texas to Arizona and Utah. 



New Mexico: El Rito; soutli of Torrance; White Sands; Suwanee; Lakewood; 

 Guadalupe Mountains. Dry hills and plains, in the Lower and Upper Sonoran zones. 



2. Eddya gossypina Woot. & Standi. Contr. U. S. Nat. Herb. 16: 164. 1913. 



Type locality: Tortugas Mountain, New Mexico. Type collected by Wooton, 

 September 2, 1894. 



Range: Known only from type locality, in the Lower Sonoran Zone. 



122. HEIIOTROPACEAE. Heliotrope Family. 



Low annual or perennial herbs; leaves alternate, exstipulate, entire; flowers perfect, 

 mostly in helicoid cymes; calyx of 5 partially united sepals; corolla gamopetalous, 

 funnelform to salverform, 5-lobed; stamens 5, adnate to the corolla; ovary 2 to 4-celled; 

 styles united; stigma annular, surmounted by a 2-lobed appendage; fruit drupaceous 

 or separating into 2 or 4 nutlets. 



key to the genera. 



Fruit of 2 nutlets; flowers large, axillary to leafiike 



bracts, appearing as if truly axillary 1. Euploca (p. 537). 



Fruit of 4 nutlets; flowers small, in terminal helicoid 



cymes 2. Heliotropium (p. 537). 



1. EUPLOCA Nutt. 



Spreading strigose annual with entire ovate-lanceolate thin leaves and conspicuous 

 white flowers in the axils of leaflike bracts; calyx lobes narrow; corolla salverform, 

 with a limb 1 to 2 cm. wide, strongly plicate; stamens included, the anthers cohering 

 by their minutely bearded tips; ovary 4-celled; fruit of 2 1-seeded nutlets. 



1. Euploca convolvulacea Nutt. Trans. Amer. Phil. Soc. n. ser. 5: 181. 1837. 



Heliotropium convolvulaceum A. Gray, Proc. Amer. Acad. 6: 403. 1857. 



Euploca grandifloraTorr. in Emory, Mil. Reconn. 147. 1848. 



Type locality: "On the sandy banks of the Arkansas." 



Range: Nebraska and Colorado to Arizona and Mexico. 



New Mexico: Carrizo Mountains; Sabinal; Albuquerque; Nara Visa; Socorro; 

 Melrose; mesa near Las Cruces; Roswell. Dry plains and hills, in the Lower and 

 Upper Sonoran zones. 



The type of Euploca grandifiora was collected on the Rio Grande below Santa Fe 

 by Emory in 1847. 



2. HELIOTROPIUM L. 



Annual or perennial herbs with alternate narrow leaves and small wliite flowers in 

 terminal helicoid cymes; calyx lobes narrow; corolla narrowly funnelform, with a 

 short 5-lobed limb; stamens included; ovary 4-celled or 2-celled; fruit of 4 1-seeded 

 nutlets. 



KEY TO THE SPECIES. 



Stems prostrate ; leaves fleshy, glabrous 1 . H. xeropMlum. 



Stems erect or nearly so; leaves tliin, hispid 2. H. greggii. 



1. Heliotropium xerophilum Cockerell, Bot. Gaz. 33: 379. 1902. 



Heliotropium spathulatum Rydb. Bull. Torrey Club 30: 262. 1903. 



Type locality: Albuquerque, New Mexico. Type collected by Cockerell in 1901. 



Range: Wasliington and Saskatchewan to California and New Mexico. 



New Mexico: San Augustine Plains; Albuquerque; Berendo Creek; Mesilla 

 Valley; Roswell. Alkaline boil, in the Lower Sonoran Zone. 



