WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 537 
RancGE: Western Texas to Arizona and Utah. 
New Mexico: El Rito; south of Torrance; White Sands; Suwanee; Lakewood; 
Guadalupe Mountains. Dry hills and plains, in the Lower and Upper Sonoran zones. 
2. Eddya gossypina Woot. & Standl. Contr. U. 8. Nat. Herb. 16: 164. 1913. 
TyprE LocaLity: Tortugas Mountain, New Mexico. Type collected by Wooton, 
September 2, 1894. 
Rance: Known only from type locality, in the Lower Sonoran Zone. 
122. HELIOTROPACEAE. 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 leaflike 
bracts, appearing as if truly axillary............. 1. Evrtoca (p..537). 
Fruit of 4 nutlets; flowers small, in terminal helicoid 
CYMES..-. 2.22 eee eee eee 2. Hetiorropium (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 grandiflora Torr. in Emory, Mil. Reconn. 147. 1848. 
Type LocaLiry: “On the sandy banks of the Arkansas.”’ 
RanGeE: 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 grandiflora 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 white 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............-......--++-- ,- lL. A. xerophilum. 
Stems erect or nearly so; leaves thin, hispid............-.-.....-. 2. A. greggit. 
1. Heliotropium xerophilum Cockerell, Bot. Gaz. 33: 379. 1902. 
Heliotropium spathulatum Rydb. Bull. Torrey Club 30: 262. 1903. 
Type LocaLiry: Albuquerque, New Mexico. Type collected by Cockerell in 1901. 
RanaeE: Washington and Saskatchewan to California and New Mexico. 
New Mexico: San Augustine Plains; Albuquerque; Berendo Creek; Mesilla 
Valley; Roswell. Alkaline soil, in the Lower Sonoran Zone. 
