Planta, Lindheimeriana. 201 



EC HINOC ACTUS. 



The specimens described in the account of Lindheimer's 

 plants, under the name of E. setispinus were the most northern 

 and rather diminutive forms of this beautiful species ; the 

 flowers were incorrectly described from a withered bud ad- 

 hering to one of the specimens. Numerous plants have since 

 been sent by Lindheimer from San Antonio, and by the St. 

 Louis Volunte rs from the lower Rio Grande. 



Echinocactus setispinus (Englm. 1. c.) : ovato-subglobo- 

 sus s. oblongo-cylindraceus ; costis 13 acutis saepe undulatis 

 s. subinterruptis plus minus obliquis ; areolis remotis, juniori- 

 bus flavido- s. albido-tomentosis ; aculeis radiantibus setifor- 

 mibus 10-16, summis longioribus imisque flavicanti-fuscis, 

 lateralibus albidis, centrali subsingulo robustiori fusco flex- 

 uoso s. apice uncinato ; floribus solitariis nudis infundibuli- 

 formibus, tubo glaberrimo ; sepalis inferioribus brevioribus 

 obtusis s. cuspidatis 25-40, superioribus elongatis lanceolatis 

 15-25, omnibus margine membranaceis basi auriculato-cor- 

 datis tenuiter ciliatis ; petalis 20-30 (cum basi miniata 

 flavis) oblanceolatis acutis integris s. denticulatis ; stylo 

 supra stamina rubella longe exserto ; stigmatibus 5-8 sulphu- 

 reis recurvis s. erectis ; bacca pulposa globosa rubra rudi- 

 mentis sepalorum infimorum membranaceis stipata. 



«. hamatus : major, subovatus ; aculeis radialibus 10-12, 

 centrali robustiori hamato. E. hamatus, Muhlenpf. E. Muh- 

 enplfordtis. Fen. 



p. setaceus : minor, subglobosus ; aculeis radialibus 14 - 16, 

 centralibus 1—3 setiformibus flexuosis. E. setispinus, Engelm. 

 1. c. — Texas, from the Colorado to the Rio Grande. Flow- 

 ers from April or May to October, and therefore, on account 

 of its beautiful flower, one of the most valuable species for 

 cultivation. — Plant 2-4 inches in diameter, and l|-6 or 8 

 inches high, flowering when quite small, simple or (in culti- 

 vation at least) sometimes proliferous at base. Var. « is the 

 larger southern form, with fewer, stouter, and longer spines 

 (radial 6-16 lines, central 12- 16 lines long). Var. /3 is the 



