362 
Specimens examined; LOWER CALIFORNIA (Gabb 11 of 1867), 
The larger forms occur in gravelly soil not far from the coast, at not over 200 to 300 
feet elevation; the smaller ones (globose and about 15 cm.in diameter) more in the 
mountains and northward, Evidently near to emoryi, but becoming much taller and 
with more numerous and unequal radials and more numerous centrals. 
11. Echinocactus emoryi Engelm. in Emory’s Rep. 156 (1848). 
Glaucescent, globose to ovate, 3 to 9 dm. high, 3 to 6 dm. in diameter: 
ribs 13 to 21, obtuse and strongly tuberculate: radial spines 7 to 9, 
nearly equal, stout, 2.5 to 5 em. long, erect or a little recurved, reddish, 
darker toward the apex, at length ashy, the laterals a little longer; a 
solitary central porrect or at length recurved or somewhat hooked, a 
little longer and stouter; all with horny tips: flowers red and tipped 
with yellow (dark brownish-purple outside), about 7.5 em. long: fruit 
oval, 2.5 to 4 em. long: seeds black and pitted, 2mm.long. (Il. Cact. 
Mex. Bound. t. 28; Cact. Whippl. Exped. t. 3, fig. 3)—Type: the Emory 
specimen was not found in the Engelmann collection, but the specimens 
of Bigelow and Schott, included in the full description of Cact. Mex 
Bound., are in Herb. Mo. Bot. Gard. 
From the valley of the Mojave (southeastern California) to the valley 
of the Gila (southwestern Arizona), and southward into Sonora; also 
on Cedros Island. 
Specimens examined: CALIFORNIA ( Bigelow of 1854): SONORA (Schott 
3; Palmer of 1869; Pringle of 1884): also specimens cultivated in Hort. 
Pfersdorf. 
In the original description of the Emory plant the fruit is said to be oval and 2.5 
to 3.5 cm. long, with black and pitted seeds 2 mm. long, but in all later descriptions 
Dr. Engelmann says that the ‘fruit and seed are unknown,” without any explanation 
as to the dropping of the original statement. The Pringle of 1884, however, abun- 
dantly confirms this character, showing a fruit as much as 4 cm. long. 
12. Echinocactus emoryi rectispinus Engelm. MSS. 
Globose, at length cylindrical, larger: radial spines very unequal, 
the 3 upper ones 10 to 12.5 em, long, the lower 3.5 to 7.5 em. long and 
paler; the central very long (30 to 32 em.), straight or slightly decurved: 
flower and fruit unknown.—Type, Gabb 12 in Herb. Mo. Bot. Gard. 
Lower California (“vicinity of Molije on the mountain sides 1,000 feet 
high”) and Sonora. 
Specimens examined: LOWER CALIFORNIA (Gabb 12, of 1867): 
SONORA (Palmer of 1869). 
++ ++ Spines dissimilar, at least the lateral radials white and setaceous and not annulate 
(sometimes wanting in Nos. 13 and 17). ; 
13. Echinocactus cornigerus DC. Rev. Cact. 36, t. 7 (1826). 
Globose or depressed-globose, 25 to 40 em. in diameter: ribs about 
21, very acute and wavy (not tuberculately interrupted): radial spines 
6 to 10, white and comparatively slender, or wanting; centrals red and 
very robust, angular-compressed, with long, sharp, horny tips, the 
