312 
38. CACTACEJE. 
ttfl- Cereus. FI. trumpet- or funnel-shaped, sep. and pet. 
very numerous imbricated spirally down the long or dis- 
tinct tube nearly or quite to the base of ov., deciduous in 
fr. Cot. 0 or very small P — St. elongate erect or creeping 
cylindric fleshy with a woody axis many-grooved and an- 
gular or flagelliform, armed with tufts of spines or bristles. 
L. none. FI. large often w. and nocturnal. Ov. and fr. 
more or less imbricatedlv scaled. 
f2. Opuntia. FI. cup-shaped ; sep. and pet. numerous col- 
lected into a distinct tubeless rose or crown at top of ov., 
deciduous in fr. “ Cot. flat leafy.” — St. and branches very 
rarely altogether cylindric, mostly while young composed 
of thick flattened leaf-like fleshy joints becoming by age 
hard and subcylindric, armed with tufts of spines or bris- 
tles. L. minute subulate fleshy (like those of a Sedum ) 
under the tufts of bristles, falling very soon. FI. large y. 
or r. diurnal. Ov. and fr. armed with distinct dense tufts 
of deciduous setce, otherwise naked. 
t+t3. Pereskia. FI. rose-like and tubeless at top of the 
naked ov. ; sep. persistent crowning the naked fr. Cot. — P 
— St. and branches normal rounded w r oody with tufts of 
spines and axillary prickles. L. normal distinct flat fleshy 
not caducous. FI. terminal panicled or solitary. Ov. and 
fr. altogether naked. 
ttfl- Cereus DC. 
ttfl- c. TRIANGULARIS (L.). Strawberry Pear. 
St. gr., only here and there jointed or constricted, creeping 
prostrate or climbing, wingedly-triangular remotely but regu- 
larly crenate ; spines very short strong woody naked 1-3- or 4- 
nate in the notches of the wings. — ihvw. Syn. 180; DC. iii. 
4(38. Cactus triangularis L. BM. 1884. — Shr. per. Mad. reg. 1, 
|. Walls of gardens in and about Funchal. FI. Aug., Sept. ; 
fr. Dec., Jan. — St. throwing out long stringy pale roots, by 
which they affix themselves and climb extensively in large 
thick entangled masses over walls «fcc. : they are almost conti- 
nuously triangularly-winged, and jointed or interrupted only 
for a short space cylindrically at very irregular remote intervals 
here and there ; the three sides concave about 2 in. broad, the 
wings or edges sinuately crenate notched or scalloped at regular 
intervals of 1-11 in., with a mostly single (rarely 2-4) incon- 
spicuous strong erect woody spine, 1-1 A line long, from a small 
obsolete tuft of very short greyish or whitish setce in each notch. 
FI. very large, 0-9 in. in diam., w., gr. outside, opening about 
8 or 9 p.m. and lasting only 8 or 10 hours, in fact withering 
soon after sunrise, disagreeably scented. Fr. rarely matured in 
