WOOTON AND STANDLEY FLORA OF NEW MEXICO. 385 



New Mexico: San Luis Mountains; White and Sacramento mountains. Damp 

 slopes, in the Transition Zone. 



5. Ionoxalis monticola Small, N. Amer. Fl. 25: 42. 1907. 



Type locality: Iron Creek, Grant County, New Mexico. Type collected by 

 Metcalfe (no. 1220). 



Range: Western Texas and southern New Mexico. 



New Mexico: Iron Creek; Burro Mountains; Organ Mountains. Shaded slopes, 

 in the Transition Zone. 



6. Ionoxalis violacea (L.) Small, Fl. Southeast. U. S. 665. 1903. 

 Oxalis violacea L. Sp. PI. 434. 1753. 



Type locality: "Habitat in Virginia, Canada." 



Range: Maine and Florida to the Rocky Mountains. 



New Mexico: Chama; Santa Fe and Las Vegas mountains. Open slopes, in the 

 Transition Zone. 



Our specimens are not typical /. violacea, but seem nearer to that species than to 

 any other. 



2. XANTHOXALIS Small. Yellow wood-sorrel. 



Low herbs with horizontal rootstocks sometimes bearing fusiform tubers; stems erect 

 or decumbent, 10 to 30 cm. long, more or less pubescent or glabrate; leaflets obcor- 

 date; flowers rather small, in axillary few-flowered cymes; petals yellow; capsules 

 columnar. 



KEY TO THE SPECIES. 



Rootstocks arising from an elongated tuberous root; leaves pubescent 



on both surfaces 1. X. albicans. 



Rootstocks with fibrous roots, or plant with a slender taproot; leaves 



glabrous or nearly so 2. X. stricta. 



1. Xanthoxalis albicans (H. B. K.) Small, N. Amer. Fl. 25: 54. 1907. 

 Oxalis albicans H. B. K. Nov. Gen. & Sp. 5: 244. 1821. 



Oxalis wrightii A. Gray, PL Wright. 1: 27. 1852. 

 Xanthoxalis wrightii Abrams, Bull. Torrey Club 34: 264. 1907. 

 Type locality: "Crescit prope Moran Mexicanorum et Llactacunga Quitensium, 

 alt. 1340 et 1480 hex." 



Range: Western Texas to Arizona, south into Mexico and South America. 

 New Mexico: Middle Fork of the Gila; Ash Canyon. 



2. Xanthoxalis stricta (L.) Small, Fl. Southeast. U. S. 667. 1903. 

 Oxalis stricta L. Sp. PI. 435. 1753. 



Oxalis corniculata stricta Sav. in Lajn. Encycl. 4: 683. 1797. 

 Type locality: "Habitat in Virginia." 

 Ranqe: Nova Scotia and Wyoming to Florida and Mexico. 

 New Mexico: Agua Fria; Las Vegas; Cloverdale; West Fork of the Gila; chama; 

 Sierra Grande. Open slopes and fields, in the Upper Sonoran ami Transition zones. 



74. ZYGOPHYLLACEAE. Caltrop Family. 



Trailing herbs or spreading shrubs with compound, 2 to several-foliolate, abruptly 

 pinnate leaves; leaflets small, entire, sometimes inequilateral; flowers perfect, yel- 

 low or oram/e, mostlyrather small, regular or nearly so; calyx <>f •"> ^<'p.il<; petals "i" the 

 52576°— 15 25 



