116 MISSOURI BOTANICAL GARDEN. 



F. X Elmensis Sprenger, Lists 1, 2. (F. Jilamentosa major $X 5". 



gloriosa}. 



Y. X Guiglielmi Sprenger, Lists 1,2. ( Y. Jilamentosa 9 X 1~- 



y. X Imperator Sprenger, Lists 1, 2. (F. Jilamentosa major 9 X 5 ~- 



gloriosa glauca pendula~) . 

 Y.X miacea Sprenger, Lists 1, 2. (Y. Jilamentosa ? X " ^ rupcs- 



tri* " [rupj'cota] ). 



F. X magnifica, Sprenger, Lists 1,2. (Y.flaccida $ X Y. gloriosa}. 

 Y. X margaritacea Sprenger, Lists 1, 2. (F. Jilamentosa and F. 



grZon'osa). 



1'. X praecox, Sprenger, Lists 1, 2. ( F. Jilamentosa and F. gloriosa'). 

 Y. X Treleasii Sprenger, Lists 1, 2. 

 F. X viridijlora Sprenger, Lists 1, 2. 

 F. X Vomerensis Sprenger, Lists 1, 2. (F. aloifolia 9 X Y - gloriosa). 



SAMUEL, A Trelease. 



Perianth openly campanulate, salver- or funnel-form, of thin broadly 

 lanceolate segments the narrowed bases of which are connate into a 

 distinct conical or cylindrical tube. Filaments thick, inserted in the 

 throat, outcurved above; anthers sagittate, horizontal. Ovary narrowly 

 oblong, longer than the oblong 3-grooved style ; stigma unequally 6-lobed, 

 openly perforate. Fruit 6-celled, pendent, baccate about a papery core. 

 Seeds thick, marginless, with ruminated albumen. Low but rather 

 thick trees with large rigid pungent coarsely filiferous leaves and ample 

 large-bracted panicle the branches of which long end in broad bract- 

 covered buds. 



Two trees to which, as it chances, no published specific 

 names are applicable, though of the general habit, floral 

 plan and fruit and seed characters of the baccate Yuccas, are 

 distinguished from all known Yuccas in having the perianth 

 distinctly tubular and gamophyllous below, with the sta- 

 mens becomingfree only at its throat; and these characters, 

 marking a very great deviation from the floral structure of 

 Yucca proper, seem to necessitate their separation from 

 that genus, and the provision for them of a new genus, 

 which is dedicated to my little son, Sam Farlow Trelease, 

 who, in the springs of 1900 and 1902 accompanied and 

 materially aided me in a field study of both species of 

 this genus and of the Mexican and Central American 

 Yuccas. 



