WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 181 
5. Phoradendron flavescens (Pursh) Nutt.; A. Gray, Man. ed. 2. 383. 1856. 
Viscum flavescens Pursh, Fl, Amer, Sept, 114. 1814, 
Tyre Locauity: Not stated. 
Rance: New Jersey to Missouri, south to Florida and New Mexico, 
New Mexico: Mesilla Valley, on cultivated ash trees (Standley 6377). 
39. SANTALACEAE. Sandalwood Family. 
1. COMANDRA Nutt. Bastarp 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 pallida A. DC. in DC. Prodr, 14: 636. 1857. 
Comandra pallida angustifolia Torr. U. S. & Mex. Bound. Bot. 185, 1859. 
Type Loca.ity: ‘Prope Clearwater,’’ Idaho. 
Rance: 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. 
Order 22. ARISTOLOCHIALES. 
40. ARISTOLOCHIACEAE. Birthwort Family. 
1. ARISTOLOCHIA lL. 
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. & Standl. 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. 
Rance: 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 petaloid; stamens 2 to 9 ; pistil 
solitary; fruit a lenticular or angled achene. 
