100 MISSOURI BOTANICAL GARDEN. 
gradually diminishing in size toward the base and apex of the leaf. 
Inflorescence slightly glaucous, scarcely 1 m. high, with few nearly 
simple branches at the very top: bracts narrowly triangular, ap- 
pressed, not widely separated: pedicels scarcely 3 mm. long. Flowers 
yellowish green, about 40 mm. long: ovary lightly glaucous, 7X18 
mm., obconical, somewhat contracted at the top: tube deeply urceo- 
late-conical, 8 mm. deep: segments 415-17 mm., quickly drying: 
filaments inserted nearly in the throat of the tube, sharply inflexed 
against the style at first, then outwardly ascending, somewhat 
maroon-dotted like the style, 25 mm. long and about one-half longer 
than the segments. Fruit? Freely bulbiferous, with the character- 
istic bulbils of the type. 
In appearance and leaf-outline, the vegetating plant close- 
ly resembles greener forms of A. macroacantha,* from which 
its characteristic ungrooved end-spine sharply distinguishes 
it. The possibility exists that it may have been distributed 
under one of the names applied to that species; but the dif- 
ferences in the arming of the leaves are accentuated in its 
maturity by the very different panicle and flowers. How 
far the peculiar geniculation of the filaments—not shown in 
such specimens of A. angustifolia as I have seen,* though 
observable in A. Cantala and its closest allies—may be char- 
acteristic remains to be ascertained —Pl, 100-108, 
EXPLANATION OF PLATES. 
Agave angustifolia Sargentii. 
Plate 100.—Flowering plant, about one-tenth natural size. The tall 
plant behind it is A. Karwinskii, behind which are pulque magueys 
(A, atrovirens) : at the left is a fairly developed plant of the Jdumave 
ixtle (A. Funkiana), and at the right a young henequen (A. four- 
croydes). 
Plate 101.—The same plant somewhat less reduced, with bulbils, in 
the autumn after flowering, 
Plate 102.—Pedicels, flowers and leaf-arming, natural size. 
Plate 103.—Bulbils at top of the old inflorescence, natural size. 
* See Rept. Mo. Bot. Gard. 18 : 247. pl. 22, etc. 
* Rept. Mo. Bot. Gard. 19: pl. 34. 
