836 AMAIIYLLIDEAE brown. (Agave.) 



ct ulfra, basi pollicem lata, erecto-pafcnfia, rigida, flexuosa; 

 margo primo aurantio-fuscus, dein albidus et inortno dcciduus. 

 Haec species nullo inodo nt putaf Haworth ad A. angiistifoliain 

 accedit, sed ad A. lieteracantham el filiferam. S.-Dyck. Hanc 

 et tres sequentcs Dasyliria crediderim, nisi flores, nt Karvvinski 

 affirmat, more Agavinm in spicam densam spadiciformem con- 

 ferti essent. Zucc. A. pugioniformi valdc confinis ? C. Bouche. 



29. A. HETERACANTHA Zitccar. in Act. Acad. Leop. Carol. 

 16. 2. 675. S.-Dtjck. Ilort. 1834. p. 303. Roem. Am. 291. Fo- 

 liis late lanceolalis, planis, viridibus, maigine castaneo-coTiieo 

 dentato cinctis ; dentibua valde approxiiuatis, comprcssis, deltoi- 

 deis, acuminatis, magnitudine ac dircctionc variis, rectis vel un- 

 cinatis ; spina terminali valida, recta, subulata. Zucc. Mexcalmetl 

 Uernand Lib. VIII. 272? — Mexico. 7\. — Acaulis. Folia iu 

 plauta quadrienni fere pedalia, latc lanceolata, 2-2^ poll. lata, 

 numerosa, rigida, erecto-patentia, plaita vel subtus paruni con- 

 vexa, glabra, laete flavescenti-viridia, tota margine corneo primum 

 castaneo deinde albido dentato cincta ; dentes pro nude foliorum 

 pcrmagni, numerosi, approximati, deltoidei, planiu?culi, acumi- 

 nati, recti, subfalcati vcl anlrorsum retrorsumve uncati, magni- 

 tudinc valde varii, majores basi in latere antico plerumque ite- 

 rum dente lninuto aucti ; spina terminalis semipollicaris, valida, 

 rccta, suhulata, castanea. Zucc. Proxime accedit ad A. univit- 

 tatam et filiferam ; a caeteris omnibus valde differt margine fo- 

 liorum lignoso, primo castaneo, sed mortuo albido, deciduo, cui 

 aculei affixi. S.-Dyck. 



30. A. PUGIONIFORMIS Zucc. in Nov. Acf. Acad. Leopold. 

 Carol. 16. 2. p. 676. S.-Dyck. Hort. 1834. p. 306. Hoem. Am. 

 291. Acaulis ; foliis linearibus, apice longe atfenuatis, pugioni- 

 formibus, rigidis, carnosis, subtus convexis, supra parum con- 

 cavis, glauccscentibus, margine spinoso-denticulatis ; dentihus 

 remotis, parvis, corneis vel ima basi subcarnosis ; inargine inter 

 eos herbaceo, integerrimo ; spina terniinali valida, subulata, ri- 

 gida, aeque ac dentes purpureo- fusca. Zucc. — Mexico. 2\. — 

 Acaulis. Folia in planta quadrienni li-2-pedalia, erecto-paten- 

 tia, recta vel parum retrorsum curvata, stricfa, glabra, glauces- 

 centia, linearia, Ionge attenuata indeque pugioniforuiia, niargine 

 rcmote spinoso-denticulata ; dentes parvi, iina basi saepius sub- 

 carnosi, sursum cornei, complanati, deltoidei, acuti, recti vel an- 

 frorsum uncinati, purpureo-fusci ; margo inter denfes herbaceus, 

 integerrimus , nudus , glaber; spina terminalis valida, 6-8 lin. 

 longa, suhulata, rigida, purpureo-fusca vel nigricans, basi parum 

 in marginem decurrens. Zucc. Folia l|-pedalia, \ poll. lata, 

 erccto-recurvula, basi semicylindracea et sensim ad apicem usque 

 subcanaliculata. Aculci niarginales remoti, compressi, basi al- 

 hidi, medio aurantiaci, apicc brunnei, rigidi, antrorsum uncinati; 

 termiualis validus, atro-purpureus. S.-Dyck. Sequenti proxime 

 affinis? C. Bouche. 



