WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 147 
5. Agave neomexicana Woot. & Standl. Contr. U. 8. Nat. Herb. 16: 115. pl. 48, 
1913. 
TyPE Locaity: Organ Mountains, New Mexico. Type collected by Standley 
(no. 541). 
RanGeE: 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 upon a stout fleshy scape; capsules 
large and deeply 3-lobed. 
1. Atamosco longifolia (Hemsl.) Cockerell, Canad. Ent. 1901: 283. 1901. 
Zephyranthes longifolia Hemsl. Diag. Pl. Mex. 55. 1880. 
Type Locatity: New Mexico. Type collected by Wright (no. 1904). 
Rance: 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........-.-.-.------ 200-2200 e eee eee eee 1. OREOLIRION (p. 147). 
Flowers blue or white. 
Styles ‘alternate with the stamens; leaves narrow, less 
than 5 mm. wide..................... woteeteee 2. SISYRINCHIUM (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, grasslike, 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. 
Tyre Locatiry: Willow Spring, Arizona. 
RanGE: Southern Arizona and New Mexico. 
New Mexico: Mogollon Mountains; Black Range. 
2. SISYRINCHIUM L. BLUvE-EYeED Grass. 
Slender perennial grasslike plants with numerous erect leaves, winged stems, and 
small blue flowers, occurring in the higher mountains in moist meadows and along 
streams. 
