308 TRANS. ST. LOUIS ACAD. SCIENCE. 



larger flower (perigon 9-10, tube i-i^, anthers 6 lines long), and 

 oblong, strongly cuspidate capsule, about i inch long and half as 

 wide ; the other form has a shorter ovary, 5-7 lines long, smaller 

 flower (perigon 7-8, tube i-i line long), and rather shorter an- 

 thers, capsule shorter, 8 lines long and 6 wide, with a short 

 abrupt point. Both forms seem to ocur in all the localities men- 

 tioned, and certainly belong together. I have been particular in 

 describing them, because we rarely have occasion to study 

 numerous and varying specimens of these plants, but must be 

 generally satisfied with poor fragments, so that it is difficult to 

 ascertain the amount of variation within the species. 



8. Agave Utahensis, Engelm. in S. Waison's Bot. 40M 

 Parall. p. 497 : acaulis ; foliis crassis glaucis e basi lata attenua- 

 tis in spinam validam infra carinatam supra usque ad apicem 

 late exaratam excurrentibus, margine acuieis rectis validis albidis 

 dentato ; bracteis scapi elati e basi lata subulatis marcescentibus ; 

 ftoribus (minoribus flavis) pedunculatis binis vel saepius quater- 

 nis, ovario oblongo perianthio subbreviore, tubo late campanulato 

 abbreviato lobis oblongis erectis ter quaterve breviore medio sta- 

 mina limbum paulo excedentia gerente ; capsula oblonga breviter 

 cuspidata. 



Southern Utah, about St. George, etc., extending into Arizona, 

 Dr. E. Palmer, J. E.Johnson, F. Bischofl". — Leaves 6-12 inches 

 long, i-if wide, not contracted above the wider base, very thick 

 and rather hard, strongly marked with the impressions of the 

 margins of the adjoining leaves ; terminal spine about i inch long, 

 pale or white in the specimens before me, with a darker base and 

 tip, almost triangular in the cross-section ; lateral spiny teeth 

 I J-2 lines long and as wide, white with a darker base. Scape, 

 together with the dense spike of 1-2 feet in length, 5-7 feet high ; 

 peduncles and pedicels distinct, in fruit often 3 lines long, ulti- 

 mate ones shorter. Flowers scarcely i, perigon about \ inch long, 

 lobes three times or more the length of the shallow and wide tube, 

 which bears the stamens in the middle, not at the base of the 

 lobes as many short-tubed Agaves do ; filaments less than J inch 

 long, about 2 or 3 lines longer than the lobes ; anthers 5-6 lines 

 long ; capsule 10-14 lines long, 4-5 wide ; seeds 1^-2 lines wide, 

 marked with flat punctate areas. 



