34 



lata, 39 : 



11; 



Potosiii^., i; !■■ . • ■ 1 I' 



rigida.:;; , ; „,:,,•.-, 



Scolymu.-,, 11; >-l,-'iii. 1~; M,:i •■, n . ■• , -,-,^ 



ata, 34 ; strif-ta, .-H ; Tayluri, 17 ; Thmu-ininisix, fi ; uni- 



vittata,21; Utahensis, 12; vestita, 15; Victorias-Reginffi, 



24; Virginiea, 37; xylonacantha, 27; yucc»folia, 35. 



A. Foliage persisting from year to year : inflorescence 



dense, many-fid.: plants flowering after a more 

 or less long interval, often but once, in others 

 occasionally. 



B. Infloresence a compact panicle; fls. borne in clusters 

 near the ends of horizonlnl bnnichts. fJiuagare.) 



1. Americina, Linn. ('.>mmi.n Cnsri i!V Fi.ast. Figs. 

 45,46. Plants becorainf; vny l;u-.- : Ivs. 4U-50, either 

 straight or the tips recurved; the luargin .scalloped be- 

 tween the sharp teeth: fl. 3 in. long, yellow. The most 

 common species in cult. A.F. 7:503. Gn. 12, p. 397. 

 G.C. III. 19:17. Gn.47,p.59. F.E. 10:595. Trop. Amer. 

 Several varieties, of which vac. picta, var, varieg^ta (B. 

 M. 3654) and var. recurval;i :ii< iIm i. i known. — Some 

 forms have Ivs. striped, an-: i --^1 withyellow. 



This species is the one will' . rrownasatub 



plant by florists, being 11 MO -h -i r. .n the summer 



for lawn and porch (1cc(n;ii h'i;. 



2. Mexioana, I.aiii. I'lant^ li.r..ming very large : Ivs. 

 20-30; similar t<. .1 , .1 </;■ //I'.o/K. t'ommon in Eu. Int. 

 about 1817, from M.x. (..('. II. 111:149. 



3. rigida, Miller. St. wanting or sometimes 4 ft. long: 

 Ivs. thin, narrow, elongated; the margin either smooth 

 or toothed. S. Mex. Perhaps more than one species in- 

 cluded under this name. A. angustifblia. Haw., seems 

 to belong here. P.M. 5893, as .4.ii«ioides. Gng. 5:89. 



Var. elong&ta, Baker (A. Candel&brum, Todaro). St. 

 much elongated. 



Var. Sisalina, Engelm. Sisal Hemp. Margin of the 

 Ivs. eiitir... Yucatan. Naturalized on Fla. keys. — Rec- 

 .1111111. n.Iril I'.ir cult, on a large scale in certain cheap 

 laiiiN..! l-'la. Largely grown in Yucatan as a fiber plant, 

 th.- ril..-i- ii. iiig exported to U. S. and used in making 



4. Pringlei, Engelm. Lvs. sword-like, very stiff, 18 

 in. or less long, narrowed from near the base to the 

 sharp tip, the margin with small, hooked, brown prick- 

 les: fl. IV^in. long, yellow. Lower Calif. 



5. atrdvirens, Karw.(4. r;m(icon^ns(«,Karw. A.Sal- 

 miclna. Otto). Often attaining a great size: lvs. few, 

 10-30, becoming 9 in. broad and 7-9 ft. long, very thick 

 at base and glaucous throughout, tipped with a stout 

 spine; the upper part of the margin homy: fl. 4 in. 

 long Mex. G.C. II. 8:177. — Several species have passed 

 under this name. 



Var. latissima {A. latlssima, coarctAta. Lehmanni, 

 and mitrcefdrmis , Jacobi). Lvs. broader, oblong-spatu- 

 late (8-9 in. broad above the middle). 



6. cocMeiris, Jacobi. PnLQUE Plant of W. Mex. 

 Very similar to the above, but lvs. longer and a foot 

 wide, not glaucous. Int. about 1867, but rare in col- 

 lections. 



7. applan4ta, Lem. Stemless : lvs. sometimes 150, 

 3-3}^in. broad, stiff and glaucous, with long, pungent 

 end spine: fl. 3 in. long, greenish yellow. -A beautiful 

 species from Mex. Int. about 1802. 



8. macrac&ntha, Zucc. Small, stemless, compact: lvs. 

 about 50, a foot long, very stiif and pungent, glaucous: 

 fls. in a lax raceme. Int. about 1830, from central Mex. 

 G.C. II. 8:137. 



9. Sh&wii, Engelm. Stemless : lvs. 50-60 or even 

 more, oblong-spatulate, 8-10 in. long, dull green and 

 slightly glaucous, with a brown tip-spine an inch long, 

 the edge with upturned brown teeth Hin. or less long: 

 fls. 3-3Kin. long, greenish yellow. S. Cal. Int. about 

 1875. 



10 Desfirti, Engelm. Stemless : lvs. few, in a rosette, 

 oblaneeolate, a foot or less long, deep concave above, 

 very glaucous, tip-spined, the lower half of the blade 

 with hooked prickles : fl. yellow, 2 in. or less long. S. 

 Cal. Int. about 1875. 



fls. 



AGAVE 



11. Sc61ymuB, Karw. Lvs. 20-40.9- 

 wide, glaucous; the margin indented 

 fl. 2-3 in. long, yellowish. Mex. (m 

 about 1880. — Said to be common. Willi 



BU. Infloresciuce a dtiise, ci/liiidrical spil 



ally borne in ticos. (Littaa.) 



C. Margins of lvs. not toothed. 



D. Lvs. linear, stiff, smooth, with the margins splitting 



off into fine threads. 



13. filifera, Salm-Dyck. Plant small, compact, about 



1 ft. in diam.: lvs. about 100, linear, stiff, 9 or 10 in. in 

 diara., light green in color, with a verv pungent tip: fl. 



2 in. long, brownish: stalk 5-8 ft. long. Mex. G.C. III. 

 . . 21: 1G7. I.H. 7: 243.- 



Several species are often 

 found in collections un- 

 dc-r this name. 



Lem. 



■■^^%'; 



igera, 



the 



ali.ivp, Imt with some- 

 what broader lvs. and 

 the margin splitting off 

 into white ribbons. 

 B. M. 5641. -Frequently 

 • cult. 



15. vestita, Watson, also of the type otA. filifera. is a 

 very recently described and introduced species. Lvs. 

 more bronzy than that species. Mex. table lands. A.G. 

 1892: 609. -It deserves a place in any large Agave col- 

 lection. 



16. geminilldra, Ker-Gawl. (Bonapdrtea jihicea. 

 Haw. I. Lvs. often 200-300, narrowly linear, somewhat 

 recurved, lK-2 ft. long, somewhat convex on both 

 sides: flower stalk sometimes 25 ft. long. Mexico, where 

 it grows commonly along streams. B.R. 1145. F.S. 7, 

 p. 6. — Very common. 



17. Tiylori, Hort. A garden hybrid of ,4. ffeminirtora 

 and A. densiflora is often seen in cult. Mn. 7:111. 

 G.C. 11.8:621. 



18. Scll6ttii, Engelm. {A, yemnifldra var. Sondrce, 

 Torr.). Stemless : lvs. linear, 1 ft. or less long and only 

 Kin. broad, flat or concave, very rigid, sharp-tipped, 

 the margin usually with white threads ; fls. IXin. long 

 S.Ariz. B.M. 7567. 



