STANDLEY — ^TREES AND SHRUBS OF MEXICO. 141 



Leaves green or purplish, uniformly spreading, 1.5 to 2 cm. wide, mostly 30 

 cm. long, not toothed, mth rather numerous coarse and shaving-like marginal 

 threads sometimes 2 mm. wide, the spine 5 to 10 mm. long or almost suppressed. 



164. Agave angustissima Engelm. Trans. Acad. St. Louis 3: 306. 1875. 

 Tepic (the type from " Ocotillo. direction of Tepic") and Sinaloa. 



Leaves green or almost red, numerous, uniformly spreading or falcate, 1 to 

 1.5 cm. wide, 30 to 60 cm. long, not toothed, with numerous long, slender, 

 mostly loosely coiled marginal threads and flattened spine 5 mm. long. 

 " Palmilla." 



With leaves scarcely 30 cm. long it is var. ortgiesiana {A. schidigera ort- 

 giesiana Baker, Gard. Chron. n. ser. 7: 303. 1877; A. ortgiesiana Roezl, Belg. 

 Hort. 1880: 52. 1880; A. maritima Hort.) ; common on the seaside rocks about 

 Manzanillo, Colima. 



165. Agave filifera Salm-Dyck, Hort. Dyck. 309. 1834. 



Hidalgo and San Luis PotosI ; type cultivated in Europe without locality. 



Leaves clear gi*een to dark green or pui'plish, rather numerous, uniformly 

 spreading or somewhat upcurved, 2.5 to 4 cm. wide, 20 to 25 cm. long, not 

 toothed, with numerous slender, recurved or coiled marginal threads, the openly 

 grooved spine 15 to 20 mm. long. "Amole," " lechuguilla mansa." 



With leaves twice as long, without increase in width, those of suckers com- 

 monly denticulate, it is var. filamentosa Baker (Gard. Chron. n. ser. 7: 303. 

 1877; A. filamentosa Salm-Dyck, Bonplandia 7: 94. 1859). A very compact 

 form somewhat resembling A. parviflora, with leaves scarcely 10 cm. long, is var. 

 compacta J. Verschaffelt (Cat. 9: 41. 1865-6; A. perplexans Trel. in Bailey, 

 Stand. Cycl. Hort. 1: 238. 1914). 



166. Agave geminiflora Gawl. Journ. Sci. 2: 88. 1817. 

 Bonapartea juncea Haw. Syn. PI. Succ. 68. 1812. 



Yucca 'boscii Desf. Tabl. Ecol. Bot. Mus. ed. 2. 28, 274. 1815, name only. 



Littaea geminiflora Tagliabue, Bibl. Ital. 1 : 100. 1816. 



Bonapartea flagelliformis Henckel, Flora 3: 45. 1820. 



Dracaena filamentosa Scanagatta in Schult. Syst. Veg. 729. 1829. 



Dracaena boscii Steud. Norn. Bot. ed. 2. 1: 528. 1840. 



Agave geminiflora filamentosa Hook, in Curtis's Bot. Mag. 82: under pi. Ji950. 

 1856. 



Region ? ; type cultivated in Europe ; sometimes, but doubtless erroneously, 

 thought to be South American. 



Leaves of various shades of green, very numerous, gracefully spreading, 

 recurved in age, 5 mm. wide, 60 to 90 cm. long, biconvex, entire, with flattened 

 spine scarcely 5 mm. long and long, usually very slender marginal threads. 



When the margin bears no threads it is var. atricha Trel. (in Bailey, Stand. 

 Cycl. Hort. 1: 238. 1914; A. gemmiflora Hook, in Curtis's Bot. Mag. 82: under 

 pi. Ji350 ; Lindl. Bot. Beg. pi. 1145; A. kndghtiana Drummond in Curtis's Bot. 

 Mag. IV. 5: under p?. 827i. 1909). 



167. Agave striata Zucc. Act. Acad. Caes. Leop. Carol. 16': 678. 1833. 

 Hidalgo ; type cultivated in Europe from Real del TNIonte. 



Leaves numerous, uniformly spreading, grayish, rhombically biconvex, 4 to 

 6 mm. wide, 60 to 90 cm. long, somewhat scabrid on the margin, the surface 

 with close round ribs separated by narrow whitened grooves, the needle-shaped 

 spine 1 to 2 mm. wide and 15 to 20 mm. long; ovary stout, protruding into the 

 perianth. 



With fewer more laxly spreading or recurving leaves it is var. recurva 

 Baker (Gard. Chron. n. ser. 8: 556. 1877; A. reeiirva Zucc. Abh. Akad. W^iss. 

 Muenchen 4: 22. 1845). " Estoquillo," " espadln." 



