202 THE CACTACEAE. 
Distribution: Southern Brazil. 
There is much uncertainty regarding the limitations of this species and also regarding 
its generic disposal. It was first described incidentally by Riimpler who considered it a 
bare form of Echinocactus scopa. Hooker, a few years after Riimpler, described and figured 
it and expressed his belief that it was a distinct species, well separated from FE. scopa. 
Later on, it was described and illustrated by Giirke; the flower is shown with a slender 
elongated tube which is very unlike the flower illustrated by Hooker. Whether we have a 
plant with a very variable flower or two distinct species we can not determine without 
further field study. 
Dr. Rose saw a plant in the Berlin Botanical Garden in 1912, just after it flowered, 
which he believed then was a generic type. He noted that the ovary was covered with 
clusters of spines as in the species of Echinocereus. It was first supposed to be a form of 
Echinocactus scopa, under which species it was incidentally first described. Hooker, when 
he described and illustrated it, stated that while it belonged to the same section of the 
genus it differed from it in the form of the plant and in the perianth. He placed it in 
Salm-Dyck’s section, Microgoni. 
This plant was named for Dr. von Haselberg of Stralsind, a cultivator of cacti. The 
variety cristatus is in the trade. 
[llustrations: Curtis’s Bot. Mag. 114: pl. 7009; Blithende Kakteen 2: pl. 98; Schelle, 
Handb. Kakteenk. 176. f. 108; Monatsschr. Kakteenk. 26: 171; Tribune Hort. 4: pl. 139; 
De Laet, Cat. Gén. f. 1; Méllers Deutsche Gart. Zeit. 25: 474. f. 6, No. 6, as Echinocactus 
haselbergt1. 
23. Malacocarpus maassii (Heese). 
Echinocactus maassii Heese, Gartenflora 56: 410. 1907. 
Globular to short-cylindric, 10 to 15 cm. in diameter, yellowish green; ribs 13, spiraled, promi- 
nent near the apex, almost wanting at base, somewhat undulate or tubercled; radial spines 8 to 10, 
white, long, and weak, or sometimes 1 or 2 stouter; central spine 4 to 7 cm. long, much stouter than 
the radials, much curved and often hooked; flowers 14 cm. broad, orange-red; segments numerous, 
linear-oblong, 10 mm. long; filaments yellow; style stout, white; stigma-lobes yellow; ovary long 
and densely soft-woolly; fruit 5 to 6 cm. in diameter, dry, dehiscing by abscission above the base; 
umbilicus broad, circular; scales on the ovary minute, their axils filled with long white hairs; seeds 
black, globular, 2 mm. in diameter, tuberculate-roughened, with a prominent white aril at base. 
Type locality: Bolivia. 
Distribution: Southern Bolivia and northern Argentina. 
The original description and illustration are poor. We believe, however, that this is 
the plant collected by J. A. Shafer in crevices of rocks, altitude 3,450 meters, at La Quiaca, 
Jujuy, Argentina, February 13, 1917 (No. 81). Our description is drawn entirely from 
Dr. Shafer’s plant. 
I llustrations : Gartenflora 56: 410. f. 50; Monatsschr. Kakteenk. 25:45, as Echinocactus 
maassii. 
24. Malacocarpus tuberisulcatus (Jacobi). 
Cactus horridus Colla, Mem. Accad. Sci. Torino 37: 76. 1833. Not Humboldt, Bonpland, and Kunth, 
1823. 
Echinocactus horridus Remy in Gay, FI. Chilena 3:15. 1847. 
Echinocactus tuberisulcatus Jacobi, Allg. Gartenz. 24: 108. 1856. 
Echinocactus soehrensii Schumann, Monatsschr. Kakteenk. 11: 75. 1901. 
Simple or sometimes in clusters of 9 or fewer, globular, often 2 dm. in diameter, dull green, de- 
pressed at apex; ribs 14 to 20, prominent, obtuse, strongly tubercled, separated by narrow intervals; 
tubercles with a flattened acute chin; areoles at first small, spineless, with an abundance of white 
wool but when old large, sometimes 1.5 cm. in diameter; radial spines not all developing the first year, 
brown when young, dark gray in age; radial spines 10 to 12; central spines 4 or 5, similar to the radials 
but a little stouter and longer, at most 2.5 cm. long; flowers 4.5 cm. long, yellowish, their areoles 
described as sparingly woolly. 
