460 



AMARYLLIDACEAE 



1. Agave utahensis Engelm. Utah Agave. Fig. 1126. 



Agave utahensis Engelm.; S. Wats. Bot. King. Expl. 497. 

 1871. 



Acaulescent, tlie trunk subterranean. Leaves 

 concave, thick, hard, glaucous, 12-20 cm. long, 

 20-25 mm. wide, the margins more or less repand, 

 beset with white deltoid teeth about 2 mm. long, 

 the terminal spine 20-35 mm. long : flower stalk 

 1.5-2.5 m. high; panicle very narrow; flowers i.i 

 clusters of 2, 4, or rarely 6, yellow ; perianth- 

 segments about as long as the ovary ; stamens 

 inserted near the middle of the broadly funnel- 

 form tube ; capsule ovoid, 2-3 cm. long. 



Desert slopes, Lower Sonoran Zone; Death Valley and 

 Providence Mountains, California, to southern Utah and 

 northern Arizona. Type locality: St. George, Utah. 



2. Agave deserti Engelm. 

 Desert Agave. Fig. 1127. 



Agave deserti Engelm. Trans. Acad. 

 ; 1875. 



St. Louis 3: 310. 



tri- 

 cm. 



Densely cespitose, acaulescent. Leaves 

 angular-lanceolate, gradually acute, 15-30 

 long, 5 cm. wide, openly concave becoming 

 channelled near the apex, falcately ascending, 

 gray-green, sometimes transversely banded ; spine 

 dull brown becoming gray, 3-30 mm. long, 

 grooved or involute below the middle ; prickles 

 dull brown, triangular, 3 or 4 mm. long, 

 mostly refle.xed, 5-10 mm. apart, the interven- 

 ing leaf-margin nearly straight, herbaceous ; 

 scape slender, 2-3 m. high, bracts separated, nar- 

 rowly lanceolate, ascending; panicle 3-6 dm. 

 long ; branches few, ascending, compactly short- 

 branched ; pedicels slender, about 5 mm. long, fascicled ; flowers chrome-yellow, rather fetid, 

 about 35 mm. long; ovary flask-shaped, with a distinct neck, 15-20 mm. long, about equalling 

 the perianth; perianth-tube funnel-form, 3 or 4 mm. long; segments about 15 mm. long, 4 

 mm. wide; stamens inserted nearly in the throat, 25-30 mm. long; anthers 10-15 mm. long; 

 capsule 45 mm. long, 15 mm. thick, nearly sessile, beaked; seeds 4-5 mm. in diameter. 



Gravelly or rocky desert slopes. Lower Sonoran Zone; western borders of the Colorado Desert near the 

 es of the San Jacinto and Cuyaniaca Mountains, California. Type locality: east of Saa. Felipe, California. 



bases 



3. Agave consociata Trel. 



Coahuilla Agave. 



Fig. 1128. 



Agave consociata Trel. Rep. yio. Bot. Gard. 22 : 53. 

 1911. 



Densely cespitose. Leaves oblong-lanceolate, 

 nearly smooth, 20-30 cm. long, about 6 cm. 

 wide, the marginal prickles 10-25 or 30 mm. 

 apart, 4-8 mm. long, triangular, the interven- 

 ing margin straight or slightly undulated ; 

 flower stalk 5-7 m. high ; flower clusters as in 

 the preceding; ovary fusiform, 25-30 mm. long, 

 nearly twice the length of the perianth-seg- 

 ments ; stamens inserted at the mouth of the 

 tube; capsule 15-35 mm. long, beaked. 



Gravelly desert slopes associated with A. deserti. 

 Lower Sonoran Zone; eastern base of the San Jacinto 

 Mountains, southern California, to northern Lower 

 California. Type locality: San Felipe, California. 



