220 CACTACEA OF THE IVES EXPLORATION. 
Plate LXIII. C. Greaet, a. clsmoNTANUS: 1, a flower; 2, a young plant raised from seed in the third year, showing 
the tuberous root. 
Plate LXIV. The same: 1, lower part of a stem with the large tuberous root, half the natural size ; 2-4, sections of the 
stem; 5-11, spines of Sure states of development and of different ages, all four times the natural size (5, a bunch of very 
young spines imbedded in the wool of the areola ; 6-10, full-grown spines, — 10, shows the lower spines crossed; 11, represents 
a very old bunch of vane ; 12, a fruit; 13, 
Plate LXV. C. GreoGoll, 8. TRANSMONTANUS: 1, flower; 2-3, spines, Four times magnified. 
Plate LXVI. OpuNTIA STENOPETALA : 1, part of a joint; 2, part of another one with two flowers; 3, section of flower. 
Plate LXVII. O. Srriciz: 1, an elongated joint with two fruits, bearing a young joint; 2, an orbicular joint ; 
eral seeds. 
Plate LXVIII. O. FrirrenpvuLA: 1, a whole plant in flower, half natural size ; 2, a joint with flower and young fruit, 
natural size ; 3, seed of this plant from below El Paso; 4, seed of same from Dojia Ana, above El Paso, a little smaller. 
Plate LXIX. O. MAcRoRHIzA: 1, a whole plant with flower and buds, half natural size; 2, fruit, natural size; [68] 
3-4, seeds of different size. 
Plate LXX. O. EmMoryr: from the region sonthwest of El Paso, in fruit. 
Plate LXXI. The same: 1, a whole plant, reduced; 2, lateral view of a tubercle with a bunch of spines; 3, front 
view of one of the largest bunches of spines ; part of the central spine, four times magnified ; 4, different seeds. 
Plate LXXII. O. Granamr: 1, whole plant, with large tuberous roots, and in fruit ; 2, a young joint; 3, a bunch of 
spines of the usual form; 4, another one with broader central spines; 5, seed. The seed, as well as parts of spines, are four 
times magnified. 
Plate LXXIII., fig. 1-8. O. Scnorrir: 1-2, bunches of spines, with parts four times magnified; 3, seed with an 
oblique embryo. tg . O. Scnorrm, var. Greceir: a bunch of spines, with part magnified four times. — Fig. 5-6. 
O. BULBISPINA : 5, an entire joint; 6, a bunch of spines, part of central spine four times magnified. — Fig. 7-8. O, IMBRICATA: 
7, a joint; 8, a bunch = ‘line and fragment of central spine, four times the natural size, showing the sheath. 
Plate LXXIV. Seeds * —L Mamillaria calcarata ; 2, M. compacta; 3, M. vivipara; 4, M. radiosa, var. borealis ; 
5, M. radiosa, var. Texana; 6, M. Nuttallii, a. borealis; 7, B. caespitosa ; 8, M. robustispina ; 9, Echinocactus uncinatus ; 
10, #. uncinatus, var. W ee 11-14, £. sinuatus (11, from the San Pedro, Wright ; 12, from northern Mexico, Gregg ; 
13, from the s same regions, Poselger; 14, the form sent by Poselger under the name of £. rvbustus); 15, Cereus Thurberi ; 
16, C. Schottii 
Plate LXXV. Seeds of Opuntia: 1-4, 0. Pe amen ~~ from Chihuahua, Wislizenus ; 2, from Matamoras ; 3, from 
Presidio, Bigelow; 4, from Santa Rosa, Bigelow) ; 0. dulcis, Wright and Bigelow; 8, O. macrocentra, Wright ; 
9-13, O. pheacantha (9, from Santa Fé, Fendler ; as southern New Mexico, Wright); 14, O. tenuwispina, El Paso ; 
15, O. arenaria, El Paso ; = O. arborescens ; 18, O. fulgida ; 19, O. mamillata, 
IX. CACTACE OF THE IVES EXPLORATION. 
From Report UPON THE CoLORADO RIVER OF THE WEST, EXPLORED IN 1857 a oe By LIEUTENANT JosEPH C. IVES. 
Washington, 1861. Part IV. Borany. P.1 
ARIA GRAHAMI, Engelm. in Mex. Bound. Rep., II. p. 7, tab. 6, fig. 1-8; Synops. Cact. in Proc. [12] 
Amer. Acad. Arts evant Sci., III. p. 6. Common along the Colorado. In flower April 7 ; fruit of last year just 
ripe. In the Mex. Bound. Rep. the fruit is erroneously called a “small oval berry, probably green.” The specimens 
then at command had shrivelled and discolored fruit ; those now before me show that the berry is elongated, clavate, 
scarlet, ? or even 1 inch long, with or without the remains of the flower. The seeds are absolutely the same as those 
of sates El Paso plant. 
MILLARIA PHELLOSPERMA, Engelm. 1. c., p. 6, tab. 7; Synops. Cact., p. 6. Common with the last, and easily 
ceca with it by the casual observer; apparently more abundant westward, while the former prevails more 
eastward. Generally simple, sometimes many-headed. Some of Dr. Newberry’s specimens closely resemble the figure 
in Mex. Bound. Rep. ; others have fewer (30-35), shorter, and stiffer spines, almost in 3 series, the 8-12 interior 
ones stout and purplish- brown. One of the specimens before me has in each bunch three divergent, hooked, central 
spines. 
Ecutvocacrus Wurepter, Engelm. & Bigelow in Pacif. Rail. Rep. IV., Cactacee of Lieut. Whipple’s Exped., 
Ee 28, tab.1; Synops. Cact., p.15. In sandy soil on the Little Colorado, often half buried in sand, in the same region 
where Dr. Bigelow discovered this pretty species in 1853. In flower in the middle of May. 
