128 



THE CACTACEAE. 



eastern Kansas, but the plants found there are not like those found in Illinois and Indiana, 

 having more spines and a glaucous bloom, and are tuberous-rooted, and these are referred 

 by us to 0. macrorhiza. The published western varieties of 0. humifusa are specifically 

 distinct; we have referred them to O. tortispina. 



Some of the joints of this plant elongate under shade conditions, reaching at least 2.5 

 dm. in length and not more than 5 cm. in width. 



Opuntia arkansana (Hirscht, Monatsschr. Kakteenk. 8: 115. 1898) has not been 

 formally described. The name should doubtless be referred here. 



Opmitia prostrata Monville and Lemaire (Forster, Handb. Cact. 478. 1846) was given 

 only as a synonym of 0. intermedia, while 0. intermedia prostrata Salm-Dyck (Cact. Hort. 

 Dyck 1849. 69. 1850) was based on 0. prostrata. 



0. rafincsquci parva Haage and Schmidt (Verzeichnis Blumenzwiebeln 1915: 29. 1915) 

 is a new name for 0. mcsacantha parva Coulter. 



Under Opmitia vulgaris Michaele Gandoger in his Flora Europea (9: 145. 1886) has 

 proposed the following new binomials: O. reccdens, 0. morisii, 0. cydoidea, 0. inaequalis, 

 O. ligustica, and 0. moditerranea. The following varieties cited under O. hmnifusa are in 

 the trade: cyinochila, greenci, macrorhiza, oplocarpa and stenochila (Stand. Cycl. Hort. 

 Bailey 4: 2363. 1916.) 



FIG. 1 60. Opuntia opuntia in its natural surroundings on Staten Island, New York. 



Illustrations: Illustr. Fl. 2: f. 2527; ed. 2. 2: f. 2986; Curtis's Bot. Mag. 50: pi. 2393; 

 Loudon, Encycl. PI. ed. 3. f. 6884, the last two as Cactus opuntia; De Candolle, PI. Succ. 

 Hist. 2: pi. 138 [A]; DeTussac, Fl. Antill. 2: pi. 30, the last two as Cactus opuntia nana. 

 Dept. Agr. N. S. W. Misc. Publ. 253: pi. [i], f. 2; Engler and Prantl, Pflanzenfam. 

 3 6a : f. 57, G; Forster, Handb. Cact. ed. 2. f. 12; Pac. R. Rep. 4: pl.io, f. i, 2; 4: pi. 23, f. 13; 

 Schumann, Gesamtb. Kakteen Nachtr. f. i, all as Opuntia vulgaris. Standard Cycl. Hort. 

 Bailey 4: f. 2602, in part as Opuntia humifusa. Amer. Entom. Bot. 2: f. 160; Amer. Gar- 

 den ii : 462; Curtis's Bot. Mag. 115: pi. 7041; Diet. Gard. Nicholson 2: f. 756; Fl. Serr. 

 22: pi. 2328; Forster, Handb. Cact. ed. 2. f. 2; Gard. Mag. 4: 280; Gartenflora 24: 218; 

 Lemaire, Cact. f. 9; Meehan's Monthly 2: pi. 6; 10: 121; Pac. R. Rep. 4: pi. 10, f. 4, 5; 

 pi. 23, f. 7, 8; Rumpler, Sukkulenten f. 125; W. Watson, Cact. Cult. f. 84, all as Opuntia 

 rafincsquci; Pac. R. Rep. 4: pi. n, f. i, as Opuntia rafinesquei minor; Forster, Handb. 



