WOOTON AND STANDLEY FLORA OF NEW MEXICO. 181 



6. Phoradendron flavescens (Pursh) Nutt.; A. Gray, Man. ed. 2. 383. 1856. 

 Viscum Jlavescens Pursh, Fl. Amer. Sept. 114. 1814. 

 Type locality: Not stated. 



Range: New Jersey to Missouri, south to Florida and New Mexico. 

 New Mexico: Mesilla Valley, on cultivated ash trees {Standley 6377). 



39. SANTAIACEAE. Sandalwood Family. 



1. COMANDRA Nutt. Bastard toadflax. 



A low glaucous herbaceous perennial; leaves alternate, sessile, lanceolate to linear, 

 entire; flowers greenish white, in terminal and axillary clusters; perianth campanu- 

 late, the limb 3 to 5-lobed, persistent; fruit spherical, 1-seeded. 



1. Comandra paUida A. DC. in DC. Prodr. 14: 636. 1857. 



Comandra pallida angustifolia Torr. IJ. S. & Mex. Bound. Bot. 185. 1859. 



Type locality: "Prope Clearwater," Idaho. 



Range: British America to California and Texas. 



New Mexico: Barranca; Magdalena Mountains; Burro Mountains; Kingston; 

 Mesilla Valley; Organ Mountains; San Augustine Plains; Tunitcha Mountains; 

 Chama; Raton; Nara Visa. Parasitic on the roots of various plants. Lower Sonoran 

 to the Transition Zone. 



Ojder 22. ARISTOLiOCHIALES. 



40. ARISTOLOCHIACEAE. Birthwort Family. 



1. ARISTOLOCHIA L. 



A prostrate perennial with slender tomentulose stems; leaves alternate, narrowly 

 hastate, long-attenuate, with mostly divergent auricles; flowers solitary, axillary, 

 small; calyx tube broadly arcuate; stamens 5, the sessile anthers adnate to the short 

 5-lobed style; pod 5-celled. 



Some species of the genus have large and showy flowers and are cultivated as deco- 

 rative plants. Our species is a small and inconspicuous herb of the southwestern 

 deserts. 



1. Aristolochia watsoni Woot. & Standi. Contr. U. S. Nat. Herb. 16: 117. 1913. 

 Aristolochia brevipes acuminata S. Wats. Proc. Amer. Acad. 18: 148. 1883, not A. 



acuminata Lam. 1783. 

 Type locality: Mexico or Arizona. 



Range : Southwestern New Mexico and southern Arizona to northern Mexico. 

 New Mexico: Guadalupe Canyon {Mearns 697). Dry hills. 



Order 23. POLYGONALES. 



41. POLYGONACEAE. Buckwheat Family. 



Herbaceous or suffruticose annuals or perennials with alternate, or sometimes 

 opposite or verticillate leaves, the stipules forming a sheath or wanting; inflorescence 

 cymose, capitate, racemose, spicate, or panicled; flowers small, mostly perfect; 

 perianth of 2 to 6 segments, the inner ones sometimes petaloidj stamens 2 to 9; pistil 

 solitary; fruit a lenticular or angled achene. 



