WOOTON AND STANDLEY FLORA OF NEW MEXICO. 147 



5. Agave neomexicana Woot. & Standi. Contr. U. S. Nat. Herb. 16: 115. pi. 48. 

 1913. 



Type locality: Organ Mountains, New Mexico. Type collected by Standley 

 (no. 541). 



Range: Mountains of southern New Mexico. 



New Mexico: Tortugas Mountain; Organ and San Andreas mountains. 



2. ATAMOSCO Adans. Atamasco lily. 



Low plant with large tunicated bulbs, slender grasslike leaves, and rather large 

 (3 or 4 cm. in diameter) yellow flowers borne singly ujjon a stout fleshy scape; capsules 

 large and deeply 3-lobed. 



1. Atamosco longifolia (Hemsl.) Cockerell, Canad. Ent. 1901: 283. 1901. 



Zephiiranthes longifolia Hemsl. Diag. PI. Mex. 55. 1880. 



Type locality: New Mexico. Type collected by Wright (no. 1904). 



Range: Western Texas to southern Arizona, south into Mexico. 



New Mexico: Mesa near Las Cruces; Lordsburg; Animas Valley. Dry hills and 

 mesas, in the Lower Sonoran Zone. 



27. IRIDACEAE. Iris Family. 



Perennial, mostly caulescent herbs with bulbUke or elongated rootstocks; leaves 

 equitant, 2-ranked; flowers regular or irregular, soUtary or in clusters from spathehke 

 bracts; perianth usually showy; sepals and petals often very unUke, distinct, or united 

 below; stamens 3, adnate to the perianth opposite the sepals; gynoecium of 3 united 

 carpels; ovary inferior; styles distinct; fruit a loculicidally 3-valved capsule. 



KEY TO THE GENERA. 



Flowers yellow 1. Oreolirion (p. 147). 



Flowers blue or white. 



Styles 'alternate with the stamens; leaves narrow, less 



than 5 mm. wide 2. Si^yrinchium (p. 147). 



Styles opposite or arching over the stamens; leaves 



broad, 10 mm. wide or more 3. Iris (p. 148). 



1. OREOLIRION Bicknell. 



An erect perennial, 25 to 50 cm. high, with flat, giasslike, conspicuously nerved 

 leaves; roots clustered, somewhat fleshy; flowers large, 30 mm. in diameter, yellow; 

 capsules oblong, 12 to 14 mm. high. 



In general appearance this plant is much like the species of Sisyrinchium, but the 

 yellow flowers enable one to distinguish it readily. 



1. Oreolirion arizonicum (Rothr.) Bicknell. 

 Sisyrinchium arizonicum Rothr. Bot. Gaz. 2: 125. 1877. 

 Type locality: Willow Spring, Arizona. 

 Range: Southern Arizona and New Mexico. 

 New Mexico: MogoUon Mountains; Black Range. 



2. SISYRINCHIUM L. Blue-eyed grass. 



Slender perennial grasslike plants with numerous erect leaves, winged stems, and 

 small blue flowers, occuniug in the higher mountains in moist meadows and along 

 streams. 



