191 1-] TRELEASE— THE DESERT GROUP XOLIXE.^^. 437 



Rose & Hay, j^o^, 1901). Metepec (Pringlc, loooi, 1904). Tula 

 {Pringle, 66^7, 1897; Rose, Painter & Rose, 8280, 1905). Ixrniqnil- 

 pan (Rose, Painter & Rose, 8p6p, 9029, 1905). Sierra cle Pachuca 

 {Rose, Painter & Rose, 5371, 1901 ; 8801, 1905 : Rose & Rose, 11484, 

 1906). OuERETARO. Cadereyta {Rose, Painter & Rose, 9714, igo$). 

 Sax Luis Potosi. San Luis Potosi {Parry & Palmer. 876, 1878). 



Leaves wide (rarely under 15 mm.), only moderately brush 

 tipped. 

 Fruit elliptical or obovate. 

 P rickles small. 



D. GR-\MixiFOLiuM Zuccarini, Allgem. Gartenzeit. 6 : 2-^<), 303. 1833 ; 

 Abhandl. Akad. Miinchen. CI. IL 3 ( = Denkschr. 16) : 225. 

 pi. I, f. I. 1840. — Kunth. Allgem. Gartenzeit. 9: 121. pi. i. 

 Yucca graminifolia Zuccarini, Cat. Hort. ]\Ionac. 1837. 

 Dasylirium graminifolium Kunth, Enum. PI. 5: 39. 1850. 

 Subcaulescent? Leaves 12 mm. wide, about i m. long, green, 

 smooth, glossy: prickles mostly 5-10 mm. apart, i 

 mm. long, yellowish white or with slightly darkened 

 tips. Inflorescence moderately high. Fruit broadly 

 elliptical, 6 X 8-9 mm., the thick style equaling the 

 rather open shallow notch. Seed ? — PI. 12. 



East-central Mexico. The type is said by Otto to have been 

 raised from seed sent with that of D. acrotrichc by Deppe in 1827. — 

 As the earliest well-characterized and figured species, this may per- 

 haps be accepted as the type of the genus, though it follows D. ser- 

 ratifoliuin in position. — In the region of D. Parryanum, Calibanus 

 and A'olina huniilis and JVatsoni. 



Specimens examined : Sax Luis Potosi. A'icinity of San Luis 

 Potosi (Parry & Palmer, 876, 1878; ?Schajfner, 242, 1878, — mixed 

 with D. Parryanum). Las Canoas (Pringle, 3746, 1891). 



Leaves of D. hybrid uni of the Botanical Garden of Rome do not 

 differ from this except in being 15-20 mm. wide, nearly dull and 

 scarcely brush-tipped. It is said to be a hybrid between D. [Xoliiia] 

 longifolium and D. serratifolium, but in foliage shows no characters 

 of the former, and it is unlike the latter as I understand it. 



Prickles moderate. 



