44 TRANS. ST. LOUIS ACAD. SCIENCE. 



quoted by Baker, is described as the smallest of all Yuccas ; 

 stemless like the last, with few short, soft-pointed leaves (9-10 

 inches long, i inch wide, almost flat) ; scape with a simple pubes- 

 cent raceme only i J feet high, perianth i inch deep ; native country 

 unknown. — Could it be a dwarfed variety of some other form> 

 possibly of the last mentioned T. glauca ? 

 ♦** Folia margine filifera. 



6. Yucca baccata, Torrey in Bot. Mex. Bound. 221, 1858; 

 Ives' Rep. Bot. 29. ; acaulis seu plerumque caulescens ; foliis 

 anguste lanceolatis versus basin dilatatam angustatis crassis rigi- 

 dissimis scabris mucrone brunneo robusto pungentibus concavis ; 

 margine filis crassioribus ornatis ; panicula brevius seu longius 

 pedunculata plerumque laevi, bracteis inferioribus amplis ovato- 

 lanceolatis cuspidatis pungentibus pergamentaceis supra albidis, 

 ultimis lanceolatis ; staminibus demum patulis vix recurvis ova- 

 rium prismaticum fere aequantibus ; stylo vario nunc elongato ; 

 bacca ssepius ovata rostrata. — T. crassifila., Engelm. in sched. 

 1848. 



Parma genuina, borealis, stolonifera ; caule nullo seu breviore ; 

 foliis longioribus latioribus asperrimis rigidis^imis, filis margina- 

 libus crassis cinereis ; segmentis florum magnorum angustis, stylo 

 elongato. 



Van /5. australis : caule elato ramoso, foliis tenuioribus lae- 

 vioribus, filis marginalibus tenuioribus saepe brunaeis ; segmentis 

 florum minorum ovatis, stylo breviore. 



A southwestern species, extending from Southern Colorado, 

 C Thomas.) to New Mexico, Dr. Wislizenus., A. Pendler no. 

 849, Ch. Wright., Dr. Bigelow, and West Texas, A. Schott^ 

 and into Southern Utah, y. JS. Johnson, Arizona, Dr. R. Pal- 

 mer., California, (Los Angeles, Capt. Russel., Providence Moun- 

 tain, Dr. y. G. Cooper., Monterey, Dr. Parry)., and far into 

 Mexico (Chihuahua, Dr. Wislizenus., Parras, G. Thurber., and 

 Saltillo, Dr. Gregg). — Flowering season according to latitude 

 from March to June, or in Northern Mexico, where with the 

 rainy season a second spring opens, often again in August and 

 September. 



The very full series of specimens before me satisfies me as to 

 the great variability of this species, the extremes of which are so 

 very dissimilar. The typical plant towards its northern limits is 

 stemless, more southwardly it makes trunks of i or 2 to S or 10 



