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 Rumpler who considered it a 

 bare form of Echinocactus scopa. Hooker, a few years after Rumpler, described and figured 

 it and expressed his belief that it was a distinct species, well separated from E. scopa. 

 Later on, it was described and illustrated by Gurke; 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 191 2, 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. 



Illustrations: Curtis's Bot. Mag. 114: pi. 7009; Bliihende Kakteen 2: pi. 98; Schelle, 

 Handb. Kakteenk. 176. f. 108; Monatsschr. Kakteenk. 26: 171; Tribune Hort. 4: pi. 139; 

 De Laet, Cat. Gen. f. 1 ; Mollers Deutsche Gart. Zeit. 25: 474. f. 6, No. 6, as Echinocactus 

 haselbergii. 



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 em. 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 Ouiaca, 

 Jujuy, Argentina, February 13, 191 7 (No. 81). Our description is drawn entirely from 

 Dr. Shafer's plant. 



Illustrations: Gartenflora 56: 410. f. 50; Monatsschr. Kakteenk. 25: 45, as Echinocactus 

 maassii. 



24. Malacocarpus tuberisulcatus (Jaeobi). 



Cactus horridus Colla, Mem. Accad. Sei. Torino 37: 76. 1833. Not Humboldt, Bonpland, and Kunth, 



.1823. 

 Echinocactus horridus Remy in Gay, Fl. Chilena 3: 15. 1847. 

 Echinocactus tuberisulcatus Jaeobi, 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. 



