THE YUCCEAE. 49 



Simulating in aspect or bract characters cultivated forms of 

 Y. flaccida. Plate 86, f. 1. 



Y. FILAMENTOSA coNCAVA (Haworth) Baker, Journ. Linn. 

 Soc. Bot. 18:228. (1880). 



Y. concava Haworth, Suppl. PI. Succ. 34. (1819). Lemaire, 111. Hort. 

 13:98. 



Y. fllamentosa latifolia Engelmann, Trans. Acad. St. Louis. 8 : 52. ( 1873). 



General characters of the type, into which it appears to pass, but the 

 usually very plicate abruptly acute or obtuse leaves deeply concave and 

 spatulately enlarged to a width of as much as 100 mm. Plates 10. 79, 

 f.l. 



About Charleston, S. C., to below Savannah, Ga., at 

 Salisbury, Md., and doubtless in much of the intervening 

 coast region. Plate 86, f. 2. 



Y. FILAMENTOSA MEDIA Carriere, Rev. Hort. 1860:213. 

 /. 47-8. 



Y. fllamentosa laevigata Engelmann, Trans. Acad. St. Louis. 8 : 52, 54, 

 214. (1873). Watson, Proc. Amer. Acad. 14 1 254. Baker, Journ. 

 Linn. Soc. Bot. 18 : 228. 



Y. fllamentosa Journ. of Hort. 52 : 271. /. 



? Y. flaccida Lindley, Bot. Reg. 22. pi. 1895. Baker, Kef. Bot. 5 . 

 text to pi. 323. 



? Y. puberula Baker, Ref. Bot. 5 .pi. 322, not text. 



? Y. glauca Baker, Ref. Bot. 5 .pi. 315. 



Leaves rather thinner, the outer gradually more attenuate and re- 

 curved, the inner broadly lanceolate ; the marginal threads straighter. 

 Inflorescence mostly puberulent and sometimes tomentose. Plate 11. 



A garden form, passing towards Y. flaccida glaucescens 

 and Y. Louisianensis. 



Y. FLACCIDA Haworth, Suppl. PL Succ. 34. (1819). 

 Lemaire, 111. Hort. 13: 99. Baker, Gard. Chron. 

 1870: 923. Ref. Bot. 5. pi. 323. 



Y. puberula Haworth, Phil. Mag. 1828 : 126. Sweet, Brit. Fl. Gard. 

 pi. 21. Lemaire, 111. Hort. 18 1 99. Baker, Gard. Chron. 1870: 

 923. 

 Y. filamentosa flaccida Engelmann, Trans. Acad. St. Louis. 3 ; 52, 214. 



