314 TRANS. ST. LOUIS ACAD. SCIENCE. 



its length; marginal teeth 6-12 lines apart, only 1 or at most 1* 

 lines long, hard and sharp, deep brown. The flowers are report- 

 ed as having a yellowish-green tube ; limb and filaments and the 

 anthers, before opening, are orange. The flowers before me 

 belong to two forms, one with longer (1 inch) pedicels and larger 

 flowers, the other with smaller flowers on shorter (3-5 lines) 

 pedicels. The ovary of the former is 16-18, the tube 4. and the 

 lobes 10-1 1 lines long ; filaments not twice as long as lobes ; an- 

 thers 11 lines long. The ovary of the smaller flower is 15, tube 

 2, lobes J-8 lines long, and the exsert part of the filament longer 

 than the whole perigon ; in the former the stamens are inserted 

 a little below the base of the lobes, in the latter at the very base 

 itself. The capsule of the latter is ij-if inches long and 7-8 

 lines wide ; seeds 3 lines wide. 



** Tubus perianthii lobis brevior vel sequalis ; stamina medio tubo inserta. 

 f Tubus lobis brevior. 

 13. Agave Shawii, n. sfi. : subacaulis ; folds perviridibus 

 erecto-patulis supra basin dilatatam vix denticulatam paulo 

 contractis ovatis acutis spina valida late excavata acuminatis, 

 margine corneo fusco vix solubili aculeis subcontiguis maximis 

 sursum curvatis vel varie flexi sornato ; scapo valido bracteis 

 foliaceis triangularibus toto imbricate ; ramis paniculas horizon- 

 talibus seu superioribus adscendentibus apice glomerulum riorum 

 subsessilium compactum foliaceo-involucratum gerentibus ; ova- 

 rio prismatico perigonio vix breviore, lobis lineari-oblongis sub- 

 erectis tubo late infundibuliformi medio stamina paulo exserta 

 gerente duplo longioribus, stylo stamina superante sa;pius arcuate ; 

 capsula prismatica acuta. 



On the arid hills which overlook the sandy strand of the Pacific 

 in the southwest corner of California, where the boundary is 

 marked by the initial monument, this fine species, growing to- 

 gether with Cereus Emory 7, was discovered by Dr. Parry in 

 1850, and a full description made ; from his memoranda Messrs. 

 Parker and Hitchcock of San Diego re-discovered it a few months 

 ago and supplied me with most instructive photographs and 

 excellent specimens ; last summer Dr. Palmer collected it with 

 immature fruit, and in November the above named gentlemen 

 found it in full bloom and sent fresh bunches to St. Louis. This 



