CHAP. CXVH. HALF-HARDY MONOCDTYLEDO^NEJS. 



252' 



described by Pursh, from the specimen in Nuttall's herbarium, 

 resembling Y. filamentosa. Introduced in 1811. 



* 9. F. FLA'CCIDA Haw. The flaccid-leaved Yucca. 



Closely 



2399 



Identification. Haw. Supp., p. 35.; Lindl. in Bot. Reg., vol. 



xxii., under Y. dracdnis. 

 Engravings. Bot. Reg. ; and our fig. 2399. 



Spec. Char., fyc. Leaves all very flaccid, weak, 

 bent below the middle and recurved, very long 

 and lanceolate, flat, concave and mucronulate 

 at the apex, roughish ; marginal filaments 

 strong, yellowish. (Haworth Suppl., p. 35.) 

 " A pretty and apparently distinct species, 

 well marked by its thread-edged scabrous 

 leaves, and pale flowers, which appear in July." 

 Introduced from Georgia in 1819. 



10. Y. GLAUCE'SCENS Haw. The glaucescent Yucca. 



Identification. Haw. Sup. PI. Sue., p. 35. ; Swt. Brit. Fl.-Gard., t. 53. 

 Engravings. Brit. Flow.-Gard., t. 53. ; and our Jig. 2400. 



Spec. Char., $c. Leaves linear-lanceolate, entire, con- 

 cave, glaucescent, straight ; margin slightly filamentose. 

 (Swt.) A stemless species, with very stiff concave 

 leaves, of a dull glaucous colour, terminating in a sharp 

 horny spine ; margin entire, with here and there a slen- 

 der white thread, slightly twisted. Flowers of a 

 greenish white, tinged with yellow. A native of North 

 America. Introduced by Mr. John Lyons in 1819. 

 This plant was first given to the nurseries from High 

 Clere, where it flowers freely every year. It has the 

 habit of Y. filamentosa, with larger and more numerous 

 blossoms, and more elegant sharp-pointed foliage. (See 

 Gard. Mag., vol. x. p. 254.) 



2400 



CHAP. CXVII. 



HALF-HARDY MONOCOTYLEDONOUS PLANTS, DESERVING A PLACE 

 IN THE BRITISH ARBORETUM. 



FOURCROY'A longa^va Karw. et 

 Zuccar, Trans. Munich, vol. xvi. 

 part 2. t. 48, 49. A splendid plant, 

 brought from South America to Eu- 

 rope, in 1828, by the Baron Kar- 

 winski; and introduced into England 

 by M. Francis Rauch, in 1833. A 

 tree, with a straight cylindrical 

 trunk, 40ft. or 50ft. high, and from 

 12 in. to 18 in. in diameter, and' 

 surmounted by a flower-stem from 

 36 ft. to 40 ft. high. It is found on 

 the summit of Mount Tanga, in the 

 province of Oaxaca in Mexico, at an 

 elevation of 10,000 ft. above the level 

 of the sea, growing in declivities 

 along with oaks and arbutuses. It flowers there in May, and ripens its fruit 

 in the following winter. Baron Karwinski mentioned to M. Rauch, in 1833, 



8 A 



2401 



