MALACOCARPUS. 
195 
We know this species from description and illustration only. 
Illustration: Martius, FI. Bras. 4 2 : pi. 50, f. 2, as Echinocactus muricatus. 
Figure 207 is copied from the illustration above cited. 
13 . Malacocarpus linkii (Lehmann). 
Cactus linkii Lehmann, Ind. Sem. Hamburg 16. 1827. 
Echinocactus linkii Pfeiffer, Enum. Cact. 48. 1837. 
Oval to short-cylindric, 7 to 15 cm. high; ribs 13, obtuse; areoles somewhat sunken into the 
ribs, 8 mm. apart; spines weak, spreading; radial spines 10 to 12, white with brownish tips; central 
spines 3 or 4, brownish; flowers yellow, 2.5 cm. long, 5 cm. broad when fully expanded; inner perianth- 
segments broad, obtuse; scales of the ovary woolly and setose in their axils; stigma-lobes red. 
Fig. 208. — Malacocarpus linkii. Fig. 209. —Malacocarpus ottonis. 
Type locality: Cited as Mexico, but in error. 
Distribution: Southern Brazil. 
This species must be close to Malacocarpus ottonis and the two are often confused. 
The original illustrations are so different, however, that we believe they must be distinct. 
Echinocactus linkii spinosior (Forster, Handb. Cact. 301. 1846) is only a name. 
The name Cereus linkii Tehmann appears in Pfeiffer’s Enumeratio (48. 1837) as a 
synonym of Echinocactus linkii, but it does not occur thus where he cites it (Nov. Act. 
Nat. Cur. 16: 316. 1828) but as Cactus ( Cereus ) linkii. 
Illustration: Nov. Act. Nat. Cur. 16: pi. 14, as Cactus linkii. 
Figure 208 is copied from the illustration cited above. 
14 . Malacocarpus ottonis (Lehmann). 
Cactus ottonis Lehmann, Ind. Sem. Hamburg 16. 1827. 
Echinocactus tenuispinus Link and Otto, Verh. Ver. Beford. Gartenb. 3: 421. 1827. 
Echinocactus tenuispinus minor Link and Otto, Verh. Ver. Beford. Gartenb. 3: 422. 1827. 
Echinocactus tortuosus Link and Otto, Icon. PI. Rar. 29. 1829. 
Echinocactus ottonis Link and Otto, Icon. PI. Rar. 31. 1830. 
Opuntia ottonis G. Don, Hist. Diehl. PI. 3: 172. 1834. 
Echinocactus ottonis tenuispinus Pfeiffer, Enum. Cact. 48. 1837. 
Echinocactus ottonis pallidior Monville in Lemaire, Cact. Gen. Nov. Sp. 88. 1839. 
Echinocactus ottonis spinosior Monville in Lemaire, Cact. Gen. Nov. Sp. 88. 1839. 
Echinocactus ottonis tortuosus Schumann, Gesamtb. Kakteen 392. 1898. 
