92. MISSOURI BOTANICAL GARDEN. 
Yucca foliorum margine crenulato. 8. Linnaeus, Hort. Cliff. 130. 
(1737). Hort. Ups. 88. (1748). 
Trunk branching above, rather tall, leaves broad and long, more fiex- 
ible and somewhat arched, less pungent. 
As far as itis known to me Y. Draconis, taking the figure 
of Dillenius as representative of it, is properly placed under 
Y. aloifolia, with the differential characters given. It 
appears to have been cultivated in Europe since 1605, but 
it is not impossible that much of the earlier Draconis, like 
that of gardens to-day, was the Central American Y. ele- 
phantipes, the fruit and flower characters of which are 
quite different from those of Y. aloifolia, though the 
foliage is of the same general type. 
Y. ALOIFOLIA conspicua (Haworth) Engelmann. Trans. 
Acad. St. Louis. 3:35. (1873).— Baker, Journ. 
Linn. Soc. Bot. 18 : 221. 
Y. conspicua Haworth, Suppl. 32. (1819).— Lemaire, Ill. Hort. 18: 
92. — Houllet, Rev. Hort. 503 388. 
Y. aloifolia flexifolia Bommer, Journ. d’Hort. Prat. 8319. (1859). 
Y. Mexicana Hort., in part. 
Trunks clustered. Leaves broad and lax, recurving, softly green 
pointed. 
A form of the preceding, frequent in European gardens 
and said by Baker to be represented by wild [escaped?] 
plants from the vicinity of Cuernavaca, on the Pacific 
slope of Mexico (Bourgeau, no. 1408). 
Y. aloifolia arcuata (Haworth) Trelease. 
Y. arcuata Haworth, Suppl. 33. (1819).— Regel, Gartenflora. 8 3 35. — 
Lemaire, Il. Hort. 13 : 93. — Baker, Gard. Chron. 1870: 828. Journ. 
Linn. Soc. Bot. 18:221.—Engelmann, Trans. Acad. St. Louis. 
3 3 37. 
Short-stemmed from a prostrate caudex. Leaves less than 25 mm. 
wide, .3 to .5m. long, smooth, the margins less denticulate than usual. 
A garden form, doubtless derived from the Carolina coast 
region, and seemingly of shaded places. 
