APPENDIX. 



225 



Figure 300 shows a joint collected by Dr. Rose at Cuenca, Ecuador, in 1918. 

 207 a. Opuntia dobbieana sp. nov. (See page 187, ante.) 



Usually low and bushy, forming dense thickets, but sometimes tall and then 3 to 4 meters high; 

 joints orbicular to short-oblong or obovate, i to 2.5 dm. long, pale green in color, very spiny; leaves 

 minute, i to 2 mm. long, green, spreading; areoles small, closely set; spines white, 5 to 12, usually 

 acicular but on old joints subulate, i to 3 dm. long, accompanied by 2 to 4 reflexed hairs from the 

 lower side of the areole; flower, including ovary, 5 to 6 cm. long; petals chocolate-colored, oblong, 2 

 cm. long; filaments and style pinkish; stigma-lobes dull green; overy strongly tubercled, leafy, very 

 spiny, especially towards the top; fruit juicy, red, at first spiny, 3 to 5 cm. long. 



Common in dry places from Huigra to Sibambe, Province of Chimborazo, Ecuador- 



Collected by J. N. Rose and George Rose, August to November 1918, at Huigra (No. 

 22201, type); at Sibambe, August 29 (No. 22434). 



This species, on account of its white spines, is referred to the Streptacanthae, although 

 it usually is more bushy than these species generally are. So far as we could learn, the 

 fruit is not used by the Ecuadoreans; the plant was never seen cultivated, and there is 

 every reason to believe it is native to Ecuador. 



The species is named for John Dobbie, general manager of the Guayaquil and Quito 

 Railway, whose courtesies and assistance added greatly to the success of Dr. Rose's visit 

 to Ecuador in 1918. 



Figures 301 and 302 (the latter at the bottom of this page) are from photographs of 

 the type plant, taken by George Rose. 



