904 OPUNTIACEAE 
to broadest above the middle, thiekish, 6-13 em. us "E green, AE 
shining, especially when young: leaves ovoid-subulat mm. long, pale 
in 
we 
obeonie: sepals triangular, gre -7 mm. long: en yellow, 4-5 cm. wide; 
petals few, narrowly cuneate, often minutely pointed: anthers nearly 1.5 mm. 
long: berry obovoid, about em. long, E s dee depressed: seed few, 
3-3.5 mm. in diameter, flatti ie Coa ands, Romano Island, Fla.—The 
numerous ivory-white s dd ER a the green joints render patches 
of the plants very conspie 
7. O. ochrocentra Small. Plant erect, 1 m. tall or less, much-branched, some- 
mes more or less diffuse, with coarse fibrous or somewhat swollen roots: 
j lo 
armed: spines 5-6 together or sometimes fewer on new joints, yellow, becom- 
ing gray sion dry, yellowish-green when wet, straight, the longer ones 4.5—5 
rather few: hypanthium tu rbinate or obovoid-turbinate: 
sepals often purple tinged, deltoid to Mas orbieular or rhombic-reniform 
aeute: pec bright lemon-yellow, 7-8.5 e vide, Modul rotate: pe ale few, 
Ped ate to obovate, notehed at the apex or r with a minute tip: anthers about 
mm e berry obov a 2-3.5 em. long, ed p! red- purple some- 
ia. slightly eonstrieted at the base: see eds T numerous, 2.5-3 m ong.—On 
edge of hammock, S E e nd of Big Pine Key and Cape Bu. Tia. 
8. O. macrarthra Gibbes. Plant prostrate, the young growth sometimes 
ascending, rather sparingly branched, but seldom forming mats, conspicuous 
on account of its long, thick, smooth un with fibrous roots: joints ellip- 
tie to broadly linear, sometimes broadened upward, mostly 15—35 em. long, 
very thick, shining, light-green: leaves ovoid-subulate, green, 5-8 mm. long, 
c-ova 
bright- yellow, 6- T. em. wide; petals broadly cuneate- be te to obovate, 3-3.5 
ong, rounded — the apex, mucronate, broad at the base: anthers abóut 
2 ong: berry narrowly obovoid or clavate-obovoid, 4-6 cm. long, red or 
red- S the umbilicus concave: seeds relatively few, 4—4.5 mm. in diameter, 
flattish.—Sand-dunes, eoast of S. C. and N. C. 
. O. Opuntia (L.) Karst. ay prostrate, the new growth sometimes ascend- 
ing, with fibrous roots, 0 ofte orming extensive bright-green mats: joints 
oe eter to forbids or ellipt ie, 5-18 em. long, deep-green, often 
som what shin ing: leaves stout-subulate, 5-7 mm. long, often purple- tinged, 
ase ending, eed straight, usually unaccompanied by spines: areolae incon- 
spicuo spines when pr ag pinkish, becoming dark-gray when dry, dark 
brown hen und hypanthium obconie, somewhat angled: sepals mostly green, 
the outer subulate to lanceolate, -9 mm. ong, aeute, or abruptly sharp- 
tipped, the intermediate ovate-lanceolate, E the inner rhombic- 
obovate, abruptly pointed: corolla rotate, bright-yellow or sometimes reddish 
at the center, 5-8 em. wide: petals few, 8-10, broadly obovate 2 
euneate-obovate, about 3—4 em. long, rounded or emarginate and e at the 
apex, mueronate; anthers 2.5-3 mm. long: berry narrowly obovoid * iu 
obovoid, 2,5-5 em. long, red or purple-red, the umbilicus concave: seeds 4—5 
