27 
in the usually smaller joints, the long narrow hypanthium, the 
more numerous petals, and the clavate berries. 
2. OpuntIA Potiarpi Britton & Rose, Smithsonian 
Misc. Coll. 50: 523. 1908 
Plant prostrate, forming irregular mats, somewhat tuberous: 
joints suborbicular or oval, varying to broadly obovate, usually 
quite thick, 10-15 cm. long, or sometimes smaller, deep-green: 
areolae rather conspicuous, much scattered, some of the upper 
ones, at least, usually armed: spines stout, at maturity gray, 
usually solitary: flowers solitary or few on a joint: sepals deltoid 
to broadly rhombic or rhombic-cuneate, acute or mucronate: 
corolla light yellow, 6-7 cm. long; petals cuneate, broadly trun- 
cate and decidedly erose at the apex: berries obovoid, 2.5-3 cm. 
long, purple, rather many-seeded: seeds 5-6 mm. in diameter. 
Pinelands and sand-dunes, coastal plain, North Carolina to 
northern Florida and Mississippi. 
At the time of the publication of the second edition of my 
Flora! this plant was known only from southern Mississippi, 
where it was originally collected nearly twenty years earlier. 
In the spring of 1917, while in search of the long-neglected 
Opuntia Drummondii, the writer found this species widely dis- 
tributed in the region north of Apalachicola, and last December 
he collected it on the hills back of Pensacola. As far as we know 
now, its range in Florida is confined to the northern part of the 
State, or, in other words, the coastal plain of the Gulf of Mexico. 
Recent exploration also brought it to light on the Atlantic 
coast. While searching for long-lost prickly-pears in the vicinity 
ot Charleston, South Carolina, in the winter of 1916, I found 
Opuntia Pollardi at several localities in that region, while last 
fall Mr. W. E. McAtee extended its known range still further 
northward by collecting specimens on Church’s Island, in Cur- 
tituck Sound, North Carolina. 
As will be noticed, by comparing the geographic range of this 
species with that of Opuntia Drummondii, that the distribution 
of the two species coincides very closely. Last vear Professor 
S. M. Tracy sent specimens of Opuntia Pollardi, collected at the 
’ Flora of the Southeastern United States, Ed. 2. 817. 1913. 
* Journal of the New York Botanical Garden 18: 237-246. 1917. 
