WOOTON AND STANDLEY FLOEA OF NEW MEXICO. 519 



9. Ipomoea lindheimeri A. Gray, Syn. Fl. 2 1 : 210. 1878. 



Pharbitis lindheimeri Small, Fl. Southeast. U. S. 964. 1903. 



Type locality: Western Texas. 



Range : Western Texas and southern New Mexico. 



New Mexico: Guadalupe Mountains; west of Hope. Dry hills, in the Upper 

 Sonoran Zone. 



5. CONVOLVULUS L. Bindweed. 



Annual or perennial twining herbs with petiolate, hastate or cordate leaves and 

 solitary or clustered, axillary, white or pink flowers; calyx naked or subtended by 

 bracts; sepals nearly equal or the outer one larger; corolla funnelform, the limb entire 

 or somewhat 5-angled; stamens included; ovary 1 or 2-celled; capsules globose or 

 nearly so, 2 to 4-valved; seeds glabrous. 



KEY TO THE SPECIES. 



Bracts large, near the calyx and inclosing it; flowers white 1. C. sepium. 



Bracts small, remote from the calyx; flowers pinkish. 



Plants nearly glabrous, sparingly pilose; leaf blades hastate, 



otherwise entire 2. C. arvensis. 



Plants canescent; blades linear or narrowly oblong, with deeply 



cleft basal lobes 3. C. incanus. 



1. Convolvulus sepium L. Sp. PI. 153. 1753. Bindweed. 

 Type locality: "Habitat in Europae sepibus." 



Range: British America to New Mexico and North Carolina; in New Mexico 

 apparently introduced. 

 New Mexico: Farmington; Abiquiu; Mesilla Valley. 

 Not uncommon as a weed in cultivated fields. 



2. Convolvulus arvensis L. Sp. PI. 153. 1753. 



Convolvulus ambigens House, Bull. Torrey Club 32: 139. 1905. 



Type locality: "Habitat in Europae agris." 



Range: Of wide occurrence in North America, in New Mexico introduced from the 

 east or from Europe. 



New Mexico: Farmington; Cedar Hill; Raton; Santa Fe; Chama; Clovis; Kingston; 

 Silver City; Rio Gila; Mesilla Valley. 



This is a very variable species, but it seems ill advised to attempt to separate any 

 of the forms. In New Mexico it is common in some localities in cultivated fields, 

 where it is evidently introduced, as it doubtless is everywhere in the Rocky Mountain 

 region. The amount of variation among the different forms is very slight, and every 

 possible intermediate can be found between them. Convolvulus ambigens seems to 

 differ in no way from numerous European specimens of C. arvensis in the U. S. National 

 Herbarium. 



3. Convolvulus incanus Vahl, Symb. Bot. 3: 23. 1794. 

 Typk locality: "America." 



Range: Colorado and Kansas to Texas and Mexico. 



New MEXICO: Albert; Tucumcari; Las Vegas; Clayton; Frisco; Socorro; Mangas 

 Springs; Kingston; San Luis Mountains; ' Carrizalillo Mountains; Organ Mountains; 

 Gray; Roswell; Queen. Dry hills and plains, in the Upper Sonoran Zone. 



119. POLEMONIACEAE. Phlox Family. 



Annual or perennial herbs or low shrubs, never twining, with opposite or alternate, 

 simple or com] ion in I lo.i\ es, ami regular v i nen his i lowers; calyx gamosepalous, 5-lobed, 

 persistent, imbricated; corolla convolute to the bud; stamens 5, equally or unequally 



