84 MISSOURI BOTANICAL GAEDEN. 
bud 15 to 18 cm. in diameter at base, and 25 to 27 cm. 
high; leaves less rigid, more appressed, proportionally 
broader, and with much less acumination, from 30 to 38 
cm. long above insertion, 10 to 14 cm. wide, often 4 cm. 
thick at cushion above base, broadest above the middle, 
color less tinged with blue, less glaucous; end-spine brown, 
22 to 25 mm. long ; marginal prickles brown, shorter, 3 
to 5 mm. long, deltoid-lanceolate, deflexed or straight, 
very small at base; scape 25 to 50 dm. or more high, very 
stout, panicle occupying its upper half, both it and its 
horizontal branches red towards the sun; flowers much 
larger, 50 to BO mm. long, tube 8 mm. ; segments 20 to 
21 mm. long; filaments two to three times the length of 
segments; capsule stout and broad, 3 to 5 cm. long, about 
half as broad ; seeds 8 mm. in longest diameter. Blooms in 
June and early July, matures fruit in September. Prop- 
agates by offsets and suckers. Nectar is very abundant, 
descending in a shower when scape is lightly shaken 
(Dr. E. L. Greene). — A. Parryi Engelmann. Trans. St. 
Louis Acad. iii. 311, Collected Writings, 310; Terr. 
Monogr. 42; Baker, Amaryllideae, 175. A. Americana ^. 
latifoUa Torrey, Bot. of Bound. 213. A. Mescal Koch 
in Wochenschrift, 1865, 94. A. crenata Jacobi, Monogr. 
229. — Southern New Mexico to Central Arizona. Mount- 
ains. Plates 36-39. 
Specimens examined : — From Arizona, seeds, 1867, 
Dr. Parry; Bisehoff, Wheeler's Expedition, 1871; Dr. 
Eothrock, No. 274, " Mescal," Rocky Canon, 6,000 feet, 
July, 1874, Expedition and Survey of 100th Meridian, 
Engelmann's type plant, figured in Plate 37. New Mexico, 
Copper Mines, E. H. Emory, October 19th, 1846, (a 
colored drawing of this plant, made by Mr. Stanley, in 
the Torrey Herbarium, Columbia College) ; Dr. A. M. Ber- 
tholet, October, 1877 ; E. L. Greene, Silver City, June and 
October, 1880; H. H. Rusby, Bear Mts., 1881. 
This plant was discovered by Lieut. Emory, October 18, 
1846, near the Copper Mines, Santa Rita Mts., New 
