POXTEDERE.E. 3C9 



glaucous, and the margins ar^ mrnislied v/ith long twisted white 

 threads. There is a handsome variegated form named V. /. 

 variegata. Native of the Southern States of North America. 



Y. flLCcida. — This is also a well-known species, which, like 

 the last, produces little or no stem. The leaves are 18 inches 

 or 2 feet long by 2 inches broad, are thinner in texture than 

 any of the preceding, and in the older ones becoming suddenly 

 bent or broken over, in consequence of which the plant lacks 

 that neatness which characterises most other Yuccas; the edges 

 of the leaves are furnished with the threads oi Jilamcntosa^ but 

 less abundantly, and they are not so clear white. 



Y. gloriosa. — Another well-known species, producing a con- 

 siderable stem, but rather slowly, which is more or less inclined 

 to branch. The leaves are 2 or 2^-^ feet long, and 2 or 3 inches 

 broad, generally concave, and marked with longitudinal folds 

 or plaitings. They are very rigid and erect, or nearly so when 

 young, but the older leaves are ascending, and scarcely at any 

 time horizontal, and the margins are destitute of threads. 

 Two varieties of the species are known in gardens under the 

 specific names Y. siiperba and K gla2(cesce?is, and they may 

 both be considered worthy of a place, as in point of fohage and 

 habit they differ from each other and from the type to a con- 

 siderable extent. The latter h.^s deeply glaucous leaves, and 

 is rather more luxuriant than the type ; and the former has 

 shorter and stiffer leaves, also glaucous, but is not so luxuriant 

 as the type. Native of America. 



Y. recurvifolia. — This species makes a considerable stem, 

 which branches somewhat freely. The leaves are from 2^4 to 

 3 feet long, and 2 or 3 inches broad, in dense heads. They 

 are thick and leatheiy, and dark green, and destitute of any 

 threads on the margins. They are erect at first, but soon 

 arch outwards and become recurved. Native of the Southern 

 States of North America. 



Y. rufo-cincta differs very little from the last in appearance, 

 but has more or less distinct brown margins to the leaves. 



PONTEDERE.i.. 



Pontederia. — A genus of aquatic plants with ornamental 

 foliage and flowers that should be better known wherever 

 waters are to be furnished with characteristic plants. There 

 are three species well known to cultivation, though not often 



