OPUNTIA. 



211 



Figure 269 represents joints of the type plant above cited; figure 270 represents a 

 joint with fruit; figure 271 is from a photograph of the type specimen. 



FIG. .271. Opuntia bahiensis. The tree to the left and 

 somewhat in the foreground. 



FIG. 272. Opuntia ammophila. 



1879. 



238. Opuntia argentina Grisebach, Abh. Ges. Wiss. Gottingen 24: 140. 



Opuntia liieronymi Grisebach, Abh. Ges. Wiss. Gottingen 24: 140. 1879. 



Erect, 5 to 15 meters high, branching at the top, the lateral branches subverticillate, teretes 

 terminal branches flat, 5 to 12 cm. long, 3 to 8 cm. broad; ovary 2 to 2.5 cm. long; petals elliptic to 

 spatulate, 1.8 cm. long, 8 mm. broad, greenish yellow; filaments white; style white; stigma-lobe; 

 yellowish green; ovary flattened, tuberculate, deeply umbilicate; fruit clavate, 5 cm. long, dull 

 purplish violet, with wine-colored pulp; seeds lens-shaped, 5 to 6 mm. long, 2.5 to 3 mm. broad. 



Type locality: Near San Andres, Oran, Argentina. 



Distribution: Northern Argentina. 



This species was considered identical with 0. brasili- 

 cnsis by Schumann, but they separate on very good fruit 

 characters. 



Figure 274 is from a photograph of a flowering branch 

 furnished by Dr. C. Spegazzini. 



Series 28. AMMOPHILAE. 



One peculiar species, native of Florida, constitutes this 

 series, characterized by a continuous erect subterete trunk, 

 flat, spiny branches, and large, yellow flowers. 



239. Opuntia ammophila Small, Journ. N. Y. Bot. Card. 20: 29. 



1919. 



Plant erect, more or less branched throughout or ultimately 

 with a stem i to 2 meters tall or more, becoming 2 to 2.5 dm. in 

 diameter, bearing several spreading branches near the top, thus tree-like, tuberous at the base; 

 joints various, those of the main stem elongate, ultimately fused on the ends and subcylindric, 

 those of the branches typically obovate or cuneate, varying to elliptic or oval, thickish, 5 to 17 cm. 

 long, becoming grayish green; leaves stout-subulate, 6 to 10 mm. long, green; areoles relatively 



FIG. 273. Opuntia ammophila. 



