= 298 ON DASYLIRION AND BEAUCARNEA. | 
L 
very gradually to the scarióse tip, which breaks up into a very distinct 
larger and unequal, the ribs about 30, distinetly raised, with narrow 
interspaces, the back rather rounded in the lower part, the colour pale 
green, scarcely at all glaucous. Scape reaching a height of 10-12 feet, ex- 
leaf. Branchlets dense, cylindrical, 1-2 inches long, 4-8 inch thick. 
» ~- BERRATIFOLIUM, Zuccarini in Otto and Dietr. Allgem. Gardenzeit. 
1838, no. 33, p. 258; Kunth, Enum. v. p.41. Yucca serratifolia,- Kar- . 
winski in Schultes, Syst. vii. p- 1716.  Roulinia serratifolia, 4. Brong. loe. 
cit. D. glaucophyllum, Hook. Bot. Mag. t. 5041; foliis viridibus vel 
glauco-pruinosis sursum facie canaliculatis apice integris venis inconspiculs, 
e more than a form with slightly narrower and more glaucous foliage, their 
distinctions still remain to be worked out, and my description of the in- 
orescence applies to the latter. 
Caudex cylindrical, not seen more than a foot high, and quite hidden by 
rooping outer leaves. Leaves not so stiff as in the two preceding 
