306 TRANS. ST. LOUIS ACAD. SCIENCE. 



below the throat ; anthers 5-6 lines long, large for the flower ; no 

 fruit seen.* 



6. Agave parviflora, Torrey^ Bot. Mex. Bound. 214: 

 parvula, acaulis ; foliis rosulatis tenaj adpressis e basi lata vagi- 

 nante dentata lineari-lanceolatis margine infra bruneo-dentato sur- 

 sum in filamenta brevia crassa alba soluto, spina terminali rigida 

 supra plana ; scapo elatiore, pedicellis brevissimis ; floribus ge- 

 minis seu subquaternis parvis, ovai'io oblongo perigonio duplo 

 breviore, tubo profunde campanulato lobis oblongis erectis bis 

 longiore, filamentis basi tubi insertis subinclusis ; capsula pisi- 

 formi subglobosa breviter cuspidata. 



On various sierras in the Pimeria Alta in Southern Arizona, in 

 fl. & fr. in July, A. Schott. — The leaves of this prettiest and small- 

 est of all Agaves are, together with the broad, sheathing base, not 

 quite 3 inches long : base i inch wide and a little longer ; blade i \ 

 inches long, 4 lines wide, somewhat contracted above the base ; 

 spines 2 lines long, at last gray. On its lower third or half the 

 leaf-margin bears very small, but rigid, sharp teeth, and higher 

 up separates into a few short, stout, white filaments — the only 

 instance of this combination, I believe, in the whole genus. 

 Scape 4-5 feet high. Flowers 6, ovary over 2, tube 2^, and lobes 

 I \ lines long, with stamens and style about 4 lines in length and 

 scarcely reaching beyond the lobes of the perigon ; anthers 3, cap- 

 sule 4-5, and seeds if lines long. 



*** Folia margine aculeato-dentata. 



7. Agave heteracantha, Zucc. in Act. Leop. Car. 16, 2, 

 675 ; Kunlh, En. 5, 836 : subcaulescens ; foliis crassis rigidis 

 lineari-lanceolatis in margine corneo demum soluto aculeos com- 

 planatos uncinates- gerentibus, spina terminali valida subterete 

 versus basin leviter exarata ; scapo et spica bracteis e basi trian- 

 gulari subulatis marcidis demum deciduis ornato ; floribus in 

 pedicellis brevissimis binis, perigonio ovario oblongo longiore, 



* Dr. Gregg collected near Ocotillo, direction of Tepic, in Western Mexico, leaves of a 

 plant which he says bears a scape 5-6 feet high, and which, like many narrow-leaved Aga- 

 ves and Yuccas, was called Palmilla by the natives; unfortunately no flowers came along, 

 but, as it seems to be an undescribed Agave, it may be designated as A. angustissima: 

 leaves " 3-3 feet long," 2^-3 lines wide, convex on the back, filamentose on the margin, nar- 

 rowed into a short (2^ lines), stout, triangular, brown spine. It seems allied to A.Jilamen- 

 iosa, Salm, which, however, has much shorter and wider leaves. The form of the terminal 

 spine precludes its being taken for a Yucca. 



