BOTANICAL REPORT. 431 



growth of tubercules is visible, their tops covered with wool. 

 Plate 2. Details of the same. 



Fig. 1. Four tubercules from near the vertex, one shows the broad scar where tin 



fruit has fallen off, another one is just developing its spines, exhibiting tliei 



points above the thick wool. 

 Fig. 2. A detached tubercule bearing a ripe fruit. 



Figs. 3 and 4. Flowers with the upper part of the tubercule and its young spines 

 Figs. 5 and 6. The fruit magnified three times; fig. 5 showing the basal opening 



fig. 6 the broad umbilicus. 

 Fig. 7. A scale of this fruit, more magnified, with two axillary spines. 

 Figs. 8-12. Seed: fig. 8 natural size, the others eight times magnified; tig. !l hit 



eral, fig. 10 dorsal, fig. 11 basal view; fig. 12 part of the surface, highly mag- 

 nified. 

 Fig. 13. Embryo, enveloped in the inner seed-coat, including also the albumen 



magnified. 

 Fig. 14 Lateral, fig. 15 frontal view of the embryo, magnified 

 Fig. 1G. Seedling, a few weeks old, magnified. 

 ~ Fig. 17. Tubercules of the smaller variety from ( Jolorado, in every state of devel 



opment. 



quis compressis intcrruptis tuberculatis ; areolis orbicularis, aculeis hrevdms, rectis sei 

 sa'pe curvatis albidis npice adustis velutiuis demum nudatis; radiahbus superiorilui: 

 1-2 robustioribus, longioribus rectis curvatis sen hamatis, ceteris o-S brevionbus 

 aculeo centrali deficiente sou singulo robustiore longiore arrecto sursum hamato 

 flore '? ; fructu ! . 



Pleasant Valley, near the Salt Lake Desert, found May 9 without flower oi 

 fruit. Plant 2 inches high, 1 or 1] in diameter; compressed tubercules 4-6 lines dis- 

 tant from one another, confluent in 13 ribs, radial spines 1-4 lines long, white pubes 

 cent or almost tomentose, more so than I have observed it in any other cactus; on the 

 lower areolae, I find only 5-6 spines, the upper ones a little longer and stouter thai 

 the balance; farther upward, the number increases to 10, one or more oi the uppei 

 ones becoming still stouter and often hooked; at last hen 1 and there a single centra 

 spine makes its appearance, 5-6 lines long, the strong hook always turned inward oi 

 upward. At first, only the dusky point of the spine is naked ; with age, the whole 

 coating seems to wear off. In another specimen, I find the spines 8-12 in number, i 

 little longer, more slender, all radiating. The small supraspinal areola proves thh 

 plant to be an Edihiocadus ; it probably belongs, together with the next, to the sec- 

 tion Ilamati, Synops. Cact. p. 15. 



Echinocactus Whipplei, Engdm. & Bigeliv, Pacif. B. Brp. IV, Cad. p. 28, 1 1, Syn 

 Cad.p.15. Var.SPINOSIOR: globosus; costis 13 compi^i. interrupt; acul,N r:nl,,hbu. 

 9-11, inferioribus ssepe obscurioribus, reliqnis longioribng niveis, 2 supenonbus saept 



