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 MLY. 



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

 (3 or 4 cm. in diameter) yellow flowers borne singly upon a stout fle.-hy scape; capsules 

 large and deeply 3-lobed. 



1. Atamosco longifolia (Hemsl.) Cockerell, C'anad. Ent. 1901: 283. 1901. 



Zephyranthes 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 bulblike or elongated rootstocks; leaves 

 equitant, 2-ranked; flowers regular or irregular, solitary or in clusters from spathelike 

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

 below; stamens 3, adnate to the perianth opposite the sepals; gyncecium 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. 



Stylos alternate with the Btamens; leaves narrow, le 



than 5 mm. wide 2. Sisyrinchhth (p. 147). 



Styles opposite or arching over the Btamens; leaves 



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



1. OREOLIRION Bicknell. 



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

 leaves roots clu tered, somewhat fleshy; flowers large, 30 nun. in diameter, yellow; 

 capsules oblong, L2 to 1 1 mm. high. 



In genera] appearance this plant le much like the specie of Sisyrinchium, bul the 

 yellow flowers enable one to distinguish it readily. 



1. Oreolirion arizonicurn ( Rothr. i Bicknell. 

 Sisyriruhiwrn arizonicum Rothr. Bot. Gaz. 2: L25. L877. 

 Type locality: Willow Spring, Arizona. 

 Ilw.i:: Southern Arizona ami New Mexico. 



Xku Mexico: Mogollon .Mountain-; Black Range. 



2. SISYRINCHIUM L. Bli I M v lass. 



slender perennial grasslike plants with numerous ereel leaves, winged stems, and 

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

 streams. 



