THE YUCCEAE. 79 
persistently denticulate or filiferous, flexible, at least the outer recurved. 
Panicle loose, exserted on a long scape. Style somewhat shouldered. 
Fruit unknown. 
A many-formed plant, apparently known only in gar- 
dens. — Plate 47, f. 2. 
The principal forms and the comparable named hybrids 
may be separated as follows: — 
Leaves plane or little concave, bright glossy green, recurved. Y. flezilis. 
Taller (1 or 2 m.). Leaves pale green. f. ensifolia. 
Leaves somewhat falcate. f. tortulata. 
Leaves evidently filiferous in age. f. Hildrethi. 
Leaves glaucous, little recurved. f. patens. 
Leaves concave, pale green. 
Outer leaves recurved. f. semicylindrica. 
Leaves all strict. f. Peacockii. 
Leaves scarcely pungent. f. Boerhaavii. 
Leaves pale-striate, filiferous. Y. X striatula. 
The following garden hybrids, with flexible leaves less 
than 25 mm. wide, might be sought here: — 
Leaves flat, entire. 
? Y. X Massiliensis, 
? ¥. X ensifera. 
Leaves flat, often denticulate. Y. X laevigata. 
Leaves very concave. Y¥. x juncea, 
Y. FLEXILIS Carriére. 
Synonymy as above. 
Dwarf. Leaves long and narrow, loosely recurved, bright glossy 
green. 
Known only in gardens, where, according to M. Carritre, 
it is sometimes erroneously called Y. acuminata, Y. sten- 
ophylla, Y. longifolia, and Y. angustifolia. It is also in 
part the Y. gloriosa of gardens. 
Y. flexilis Peacockii (Baker ) Trelease. 
Y. Peacockit Baker, Journ. Linn. Soc. Bot. 18; 223. (1880). Kew 
Bull. 18923 8.— Wiener Ill. Gart.-Zeit. 6 : 320. — Garden. 19: 226. 
Scarcely appears to differ except in the numerous leaves being stricter. 
