WOOTON AND STANDLEY FLORA OF NEW MEXICO. 197 



7. BISTORTA L. Bistort. 



Herbaceous, perennial, alpine or subalpiue plants, glabrous, bright green; stems 

 simple; leaves radical and cauline, oblong to linear; sheaths never ciliate; inflo- 

 rescence sometimes showy, of a single terminal spicate raceme; stamens 8 or 9, 

 exserted; styles usually S-jjarted, exserted. 



KEY TO THE SPECIES. 



Racemes not viviparous (i. e. not bulblet-bearing), oblong, 10 to 20 



mm. thick 1. B. histortoides. 



Racemes viviparous below, lineai", 5 to 8 mm. thick 2. B. vivipara. 



1. Blstorta bistortoides (Pursh) Small, Bull. Torrey Club 33: 57. 190G. 

 Polygonum bistortoides Pursh, Fl. Amer. Sept. 271. 1814. 



Type locality: "In low grounds on the banks of the Missouri, called Quamash- 

 flats." 



Range: Arctic America to California and New Mexico. 



New Mexico: Santa Fe and Las Vegas mountains; Mogollon Mountains. Meadows 

 in the mountains, Canadian to Arctic-Alpine Zone. 



2. Bistorta vivipara (L.) S. F. Gray, Nat. Arr. Brit. PI. 2: 268. 1821. 



Alpine bistort. 



Polygonuvi viviparum L. Sp. PI. 360. 1753. 



Type locality: "Habitat in Europae subalpinis pascuis duris." 



Range: British America to New Mexico and New England; also in Europe and 

 Asia. 



New Mexico: Santa Fe and Las Vegas mountains; Rio Pueblo; Baldy. Meadows, 

 in the Arctic-Alpine Zone. 



8. BILDERDYKIA Dum. Black bindweed. 



A twining annual with ovate, hastate, acute to acuminate leaves, the upper ones 

 narrower; stems rough-angled; inflorescence axillary, slender, inteiTupted, of com- 

 pound racemes bearing reduced leaves. 



1. Bilderdykia convolvulus (L.) Dum. Fl. Belg. 18. 1827. 



Polygonum convolvulus L. Sp. PL 364. 1753. 



Tiniaria convolvulus Webb & Moq. in Webb & Berth. Hist. Nat. Canar. 3^: 221. 

 1836-50. 



Type locality: "Habitat in Europae agiis." • 



Range: Nearly throughout North America, except in the extreme north. 



New Mexico: Tunitcha Mountains; Chama; Farmington; Winsora Ranch; Pecos; 

 Mogollon Mountains; Kingston; Mesilla Valley; White Mountains; ]\Iaxwell City; 

 Saudia Mountains. Waste ground and fields, chiefly in the Transition Zone. 



9. FAGOPYRUM Gaertn. Buckwheat. 



Annual wifh hastate leaves scattered along the stems; ocrese fugacious; flowers in 

 terminal or axillary racemes; calyx not keeled. 



1. Fagopyrum fagopyrum (L.) Karst. Deutsch. Fl. 522. 1880-83. 

 Polygonum fagopyrum L. Sp. PI. 364. 1753. 

 Fagopyrum esculentum. Moench, Meth. PI. 290. 1794. 

 Type locality: "Habitat in Asia." 



New Mexico: Balsam Park, Sandia Mountains {Ellis 273). 

 Common in cultivation and frequently escaped in North America. 



