APPENDIX. 287 



On page 106, vol. iii, under Hamatocactus setispinus, add to illustrations: Schulz, 

 500 Wild Fl. San Antonio pi. 12, as Echinocactus setispinus. 



On page 107, vol. iii, under Strombocactus disciformis, add to illustrations: Remark, 

 Kakteenfreund 12, as Echinocactus turbiniformis. 



On page 123, vol. iii, at end of Echinofossulocactus, insert the following: 

 Echinocactus tetracentrus Lemaire (Cact. Gen. Nov. Sp. 31. 1839) has not been 



identified. It is to be referred to one of the species of Echinofossulocactus. 



Echinocactus barcelona (Cact. Journ. 2: 79, 175, 191) was offered for sale by F. A. 



Walton. 



On page 124, vol. iii, under Ferocactus stainesii, insert: Echinocactus pilosus canescens 

 Scheidweiler is listed in Index Bibliographique (286. 1887). 



On page 129, vol. iii, under Ferocactus lecontei, insert: Echinocactus leopoldii (Belg. 

 Hort. 25: 132. 1876) was only briefly described when awarded a prize in Belgium. 

 Schumann referred it as a synonym of E. cylindraceus , while De Laet, who saw the plant, 

 thought it was a form of Ferocactus lecontei. It is misspelled in Volume iii. 



Add to illustrations: Wiener 111. Gart. Zeit. 11 : pi. 3, in part; Thomas, Zimmerkultur 

 Kakteen 32; Watson, Cact. Cult. ed. 3. f. 26, as Echinocactus lecontei. 



On page 130, vol. iii, under Ferocactus acanthodes, add to illustrations: Thomas, 

 Zimmerkultur Kakteen 40, as Echinocactus cylindraceus. 



On page 132, vol. iii, insert: 

 11a. Ferocactus johnstonianus Britton and Rose, sp. nov. 



Plants simple, short-cylindric, 6 dm. high or less, up to 3.5 dm. in diameter; ribs 24 to 31, with 

 margins undulate; areoles elliptic, rather closely set; spines 20 or more, subulate, very much alike, 

 none hooked, slightly spreading and more or less outwardly recurved, 7 cm. long or less, yellow to 

 brownish yellow, annulate; flowers including ovary 5 cm. long; perianth-segments narrow, yellowish, 

 or the outer ones tinged with red, short-acuminate, the margins slightly erose; filaments yellowish 

 below, becoming reddish above; stigma-lobes 8 to 13, flesh-colored; scales on the ovary orbicular; 

 fruit small, 2.5 cm. in diameter, the seed dehiscing by a large pore at the base; seeds angled, black, 

 pitted, 2 mm. long; hilum small, circular, depressed, white. 



Collected by Ivan M. Johnston at Angel de la Guardia Island, Lower California 

 May 2, 1921 (Nos. 3394, type, and 3395). 



This species is perhaps nearest Ferocactus diguetii but is much smaller and has fewer 

 ribs, many more spines in a cluster, and yellow flowers. 



On page 140, vol. iii, under Ferocactus viridescens, add to illustrations: Bliihende 

 Kakteen 3: pi. 177, as Echinocactus viridescens. 



On page 143, vol. iii, under Ferocactus latispinus, add to illustrations: Remark, 

 Kakteenfreund 13, as Echinocactus cornigerus flavispinus. 



Also add the note: Cactus cornigereus Mociiio and Sesse (De Candolle, Prodr. 3: 461. 

 1828) is given as a synonym of Echinocactus cornigerus. 



On page 144, vol. iii, under Ferocactus hamatacanthus , add to illustrations: Rother, 

 Praktischer Leitfaden Kakteen 106, as Echinocactus longihamatus . 



On page 148, vol. iii, under Echinomastus erectocentrus, insert: Mr. C. R. Orcutt has 

 called our attention to the fact that in Echinomastus erectocentrus the fruit opens by 

 splitting down one side, and in this respect differs from our generic description. This 

 character in the description was drawn from a study of the fruits of E. intertextus, the only 

 species in this genus of which we know much about the fruit. He also states that the fruit 

 of Astrophytum myriostigma splits open on one side, an observation we had not recorded. 



On page 150, vol. iir, under Echinomastus unguispinus, add to illustrations: Thomas, 

 Zimmerkultur Kakteen 31 ; Schelle, Handb. Kakteenk. 200. f. 132, as Echinocactus ungui- 

 spinus. 



