AC i AVE 



AGAVE 



235 



Figs. 139, 140. Lvs. lancoolato, 6-8 .\ 60-80 in., smooth, 

 gra J', iiscemling with out curved ends, with rathrr short 

 and stout rocurvod rouud-grooved very shortly tiecur- 

 rcnt spine obliquely flattened at base, and moderately 

 large gray jiriekles on prominent marginal elevations: 

 inH. 20-30 ft., rather slender; fls. 232-2/4 in.; ovary 

 1 '4 in., segra. 1 in., tube'iin. Mex.(?). Established 

 around the Medit. Gt. 24:82.5; 27, p. 307; 41, p. 

 2t)i). Penzig, Fl. Litt. Med., pi. 140. Reichb., le. 

 Fl. Germ., pi. 374. 15. H. 9, p. 308. R. H. 187.5, p. 

 1.52. .Journ. N. V. Bot. Gard. 11, pi. 79, 81. Adamovic, 

 Pflanzenw. Dalmat., pi. 1. Abhandl. Hamburg. 

 Kolon. Inst. 6, p. 64. G.W. 8, p. 337. Proe. Am. Phil. 

 Soc. 49, pi. 32. — The plant more commonly cult, in 

 this country as ^4. atncricnna has narrower, more 

 hooked lvs., ;is in the next, but grayer and with the 

 short recurved spine scarcely decurrent and round at 

 base, var. Milleri, Baker (.4. Milleri, Haw.? A. Virginia, 

 Mill.? .4. Iwtcvirens and .4. americana Isetevirens, 

 Hort.?) Variegated forms of this, frequently grown, are 

 var. marginata in yellow- or white-margined forms, var. 

 striata variously lined with yellow or white, and var. 

 medio-picta with a broad median >'ellow band. Wies- 

 ner Festschr., pi. 6. A reputed hybrid betw'een .4. ameri- 

 cana and ^4 . dcnsiflora is x A. massiliensis, Hort. Deleuil. 



22. picta, Salm-Dyck (^4. longifblia plcta, A. mexicana 

 pida, and .4. Milleri picta, Hort.). Lvs. hnear-lanceo- 

 late, ascending with recurved ends, at length 6-8x100 

 in., smooth, dark green with bright white or yellow 

 marginal variegation, slightly glaucous when young, 

 with needle-like, straight , narrowly grooved spine anc 1 

 moderate prickles on somewhat prominent marginal 

 elevations: infl. tall and rather slender; fls. 3 in.; ovary 

 I'o in., segni. 1 in., tube Join.: caps, oblong, stipitate 

 and beaked. Mex.(?). G.W. 8, p. 337. Wiesncr 

 Festschr., p. 342, pi. 7. Pop. Sci. Monthly, 70, p. 210. 

 Proc. Amer. Phil. Soc. 49, pi. 32. — Green seedlings (var. 

 viridis) occur on the Riviera and are in hmited cult. 



DD. Fls. rather small, ydlow, shallow-ticbed: caps, thin- 

 walled, small. Not bulbiferous. 



23. mannorata, Roezl (A. Todarbi, Baker. A. Troubet- 

 .ikoydna, Hort. A. undaldta. Tod.). Lvs. broadly lance- 

 olate, outcurving, 10-1.5 x 72 in., very rough, green- and 

 gray-banded, with rather short and stout recurved 

 narrowly grooved spine and large rough rusty brown 

 prickles often from prominent marginal elevations: 

 infl. ample; fls. golden, m 'n.; ovary Jiin., segm. 

 }2in., tube 3^in.; caps, short, stipitate. S. Mex. 



DDD. Fls. moderately long, creamy, deep-tubed: caps, firm, 

 elongated. Not bulbiferous. 



24. Palmeri, Engehn. IjVS. lanceolate, ascending, 

 3-4 X 18-30 in., blue-green, somewhat glaucous, with 

 long, slender, open-grooved spine and slender, hooked 

 garnet-purple or gray prickles, often on marginal 

 I'levations: infl. ample; fls. leathery, 2-2J4 in.; ovary 

 1 in., segm. 32in., tube ^i'm.: caps, oblong, not stipi- 

 tate. .\riz. and \ew Mex, Rei). Mo. Bot. Gard. 7, 

 pi. 48-52. Journ. N. Y. Bot. Gard. 5, p. 178. 



BBGBBBB. Li's, triangular, thick and stiff, rather small: fls. 

 small, yellow, shallow-tubed, not followed by bulbils. 

 Trunkless. 



25. deserti, Engelm. Cespitose: lvs. triangular-lan- 

 ceolate, falcately erect, 2 x 6-12 in., gray, with slender, 

 gray-brown, grooved spine and friable teeth : infl. slender, 

 sparse; fls. yellow, 1}4 in.; ovan,' fla-sk-.shaped, }^in., 

 segm. }^in., tube J^in.: caps, oblong, scarcely stipitate. 

 Colo, desert, Calif. Rep. Mo. Bot. Gard. 7, "pi. 33, 34; 

 22, pi. 41, 42. 



26. Pringlei, Engehn. Cespitose: lvs. triangular- 

 oblong, a.«cending, 2 x t>-16 in., gray, with slender, 

 drab, grooved .spine and rather firm teeth: fls. l}^-2 

 in.; ovary 1-1 M in., segm. }^in., tube J^in. Mts. of 

 N. Low. Calif. Rep. Mo. Bot. Gard. 22, pi. 44. 



AA. Infl. spike-like, the fls. usually in pairs though 

 exccplionally clustered on very short branches: 

 bulbils very rarely following the fls. {27-55.) 

 Subgenus Litt.e.\. 

 B. Lvs. triangular-lanceolate, thick and stiff, rather small: 

 fls. often clustered on short branches, cup-shaped, 

 sninll. Trunkless. 

 27. utahensis, Engelm. (A. Newberryi, Engehn.). 

 Cespitose: lvs. erect-spreading, 1-2x6-12 in., gray, 

 with slender, grooved, gray spine and rather small and 

 friable gray teeth: infl, 5-15 ft., with simple or forked 

 branches 1-2 in. long; fls. 1-lli in.; ovary flask- 

 shaped, ^in.,segm. 'gin., tube Jijin.: caps, thin -walled, 



Uih y.i&'^~ -■ - ■ -- ■" - 





141. Agave attenuata. (No. 28.) 



small, not stipitate. Grand Canon region. Pop. Sci. 

 Monthly, 1911, p. 11. G.F. 8, p. 384. Rep. Mo. Bot. 

 Gard. 7, pi. 32. 



BB. Li's. moderately large, thin, unarmed or at most 

 very minutely denticulate, neither filiferous nor 

 horny- margined. Trunk well developed in the first: 

 fls. open, rather small. 



28. attenuata, ,Salm-Dyck (A. glaucescens. Hook.). 

 Figs. 141, 142, 143. Trunk 4-5 ft., sometimes prostrate: 

 lvs. broadly oblanceolate, spreading, with recurved tips, 

 6-10x2.5-30 in., glaucous, thin, entirely unarmed: infl. 

 5-10 ft., usually recurving, its very short stalk closely 

 covered by bracts; fls. paired, about 2 in.; ovary 

 flask-shaped, ^4-1 in-, segm. ?4'in., tube 3-iin. Excep- 

 tionally produces large bulbils among the caps, after 

 flowering, Mex. F.E. 31, p, 1172 B, B.M. .5333. 

 J. H. Ill, 42, p, .392, R,H. 1876, p. 149, Erfurter 

 Fuhrer. 7, p. 70. G.F. 10, p. 95. Rep. Mo. Bot. Gard. 

 9, pi, 31. G.C. III. 8, p. .500; III. 17, p. 4.55; III. 45, 

 suppl. pi. Pharm. .Jovirn. 70, p, 706. — Varies in a form 

 with sterile base of spike longer and sparsely bracted, 

 and fls. in clusters of 6-8, var. paucibracteata, Rep. 

 Mo. Bot. Gard. 11, pi. 7. The varietal names ellip- 

 tica, latifolin, lallssima and subunduldta have been 

 applied to garden forms. A cross with A. Verschaffeltii 

 is X A. Guignardii, Hort.; a cross with .4. xylonacantha 

 is listed. 



29. EUemeetiana, Koch, Nearly or quite trunkless: 

 lvs. lanceolate, spreading, 6 x 24 in. or more, glaucous, 

 thin, unarmed: infl. .5-10 ft., erect, the rather short 

 sterile biise closely covered by linear bracts; fls. paired. 



