158 THE CACTACEAE. 



Plate xxvi, figure 4, represents a flowering joint of a plant given to the New York 

 Botanical Garden by Frank Weinberg in 1903; figure 5 represents another joint of the 

 same plant. Figure 196 represents a joint of a plant obtained by Professor Carlos de la 

 Torre at Punta de los Molinos, Cuba, in 1912. 



166. Opuntia cardiosperma Schumann, Monatsschr. Kakteenk. 9: 150. 1899. 



About 2 meters high, erect, branching; joints narrowly ftblong to obovate; rounded at apex, 

 10 to 15 cm. long or smaller in greenhouse specimens, easily breaking apart, pale green, more or 

 less tuberculate ; leaves minute, subulate; areoles large, i to 2 cm. apart, with white wool, when young 

 having conspicuous secreting glands; spines, when present, i to 4, acicular, stiff, more commonly i or 

 2 from an areole, short, i to 2 cm. long, brownish at first but nearly white when old, porrect or ascend- 

 ing; glochids tardily developing, never conspicuous, brownish; flowers unknown; fruit elongated, 

 pear-shaped, 7.5 cm. long; seeds 6 mm. broad, 2.5 to 3 mm. thick, cordate, gray, with broad yellow 

 margins, woolly on the sides. 



Type locality: At Recoleta, near Asuncion, Paraguay. 

 Distribution : Paraguay. 



Figure 197 represents joints of the plant sent to the New York Botanical Garden 

 from La Mortola, Italy, in 1913. 



167. Opuntia arechavaletai Spegazzini, Anal. Mus. Nac. Buenos Aires. III. 4: 520. 1905. 



Plants tall, i to 3 meters high, much branched; joints flattened, oblong to obovate, 25 to 30 cm. 

 long, green; spines, usually i, sometimes 3, elongated, porrect, up to 9 cm. long, white, flattened; 

 flowers 4.5 cm. long, yellow; stamens and style white; fruit violet-purple, 7 cm. long. 



Type locality: Near Montevideo, Uruguay. 



Distribution: Argentina and Uruguay. 



Illustration: Anal. Mus. Nac. Montevideo 5: pi. 35. 



168. Opuntia mieckleyi Schumann, Bliihende Kaktcen i: pi. 44. 1903. 



Plant erect, much branched; joints narrowly oblong, 15 to 25 cm. long, 4 to 6 cm. broad, glab- 

 rous, dark green, darker below the areoles; tubercles rather prominent; leaves small; areoles large, 

 filled with white wool; spines, when present, i or 2, very short (5 mm. long), dark-colored; flower- 

 buds obtuse; flowers brick-red, 6 cm. broad; petals irregularly notched; ovary spineless. 



Type locality: In Paraguay. 



Distribution: Paraguay; Estancia Loma, in San .Salvador. 



Named for W. Mieckley, gardener in the Berlin Botanical Garden. 



Illustration: Bliihende Kakteen i: pi. 44. 



169. Opuntia bonaerensis Spegazzini, Contr. Fl. Tandil 18. 1904. 



Opitnlia chakcnsis Spegazzini, Anal. Mus. Nac. III. 4: 519. 1905. 



Two meters high, very much branched; joints spatulate to elliptic-spatulate, 15 to 25 cm. long, 

 green; spines wanting or one, short; flowers orange, large, 4 cm. long; fruit obconic, 6 to 7 cm. 

 long, dull purple ; seeds 5 to 6 mm. long, subglobose. 



Type locality: Sierra de Curamalal, Argentina. 

 Distribution: Argentina and perhaps Paraguay. 



Opuntia paraguayensis Schumann (Monatsschr. Kakteenk. 9: 149. 1899) accord- 

 ing to Spegazzini, and if so this name would supplant 0. bonaerensis. 

 Illustration: Anal. Mus. Nac. Montevideo 5: pi. 23. 



The three following, known to us only from descriptions, may belong to this series. 

 OPUNTIA STENARTHRA Schumann, Monatsschr. Kakteenk. 9: 149. 1899. 



Shrubby, erect or decumbent, creeping over stones or ascending trees; joints thin, narrow, 

 yellowish green, oblong to lanceolate, rounded at base, glabrous; spines either wanting or i to 3 

 from an areole, stoutish, subangular; flowers yellow; seeds woolly. 



Type locality: Estancia Tagatiya, Paraguay. 

 Distribution: Paraguay. 



