OPUNTIACEAE 897 
Sepals and petals 4 or 5 each, very different: leaves with entire a ae blades: 
erect or climbing plants, with rigid hairs. Fam. 1. LOAS 
Sepals and petals nearly alike, at least the latter numer- 
ous: leaves typically mere scales or wanting: succulent 
plants, usually armed with p ines. Fam. 2. OPUNTIACEAE. 
Famity 1. LOASACEAE — Loasa FAMILY 
Rigid herbs with barbed or stinging hairs. Leaves with entire lobed, 
pinnatifid, or dissected blades.—About 20 genera and 250 species, mostly 
merican. 
1. MENTZELIA [Plum.] L. Brittle-stemmed, mostly diffuse or reclin- 
ing herbs. Leaf-blades relatively nen sinuate or lobed. Androecium with- 
out staminodia. eeds angled.—About 35 
species, American. 
idana Nutt. Leaf-blades 2-9 em 
1. M. 
long, ae to deltoid-ovate toothed and 3- 
lobed: K puis often very broad at 
the base: pet s golden- idi 15-18 mm. 
long: EM ule o 5 em. lon — (Poo R-MAN'S NEN 
PATCH STICK-LEAF. Br AZING-STAR.)— ANO 
AE 
=," 
b=: 
UM sand-dunes, and pe non 
pen. Fla. and the Keys.—(W. I.)—Spr 
fall or a all M S.—The barbed hairs on tis 
leaves eause them y o. very PaA to 
clothing. The ey a ery effective in 
cutting off the feet A pm of small im 
that alight on the 
dd su 
- ee 
" 
[I 
sl Aare 
Phe oo 
* 1 ee 
rR 
ATAA 
PELLEM 
Famity 2. OPUNTIACEAE — Cactus FAMILY 
Shrubs or trees with more or less succulent tissues over a woody frame- 
sore the stem depressed or elongate, simple or branched, continuous o 
often showy, diurnal or nocturnal. Caly several or nu rear sepals. 
etals 
droecium of numerous stamens in several series. Re e of several 
united earpels. Ovary inferior, with the hypanthium often much pro- 
duced beyond it, 1-celled, with several parietal placenate. Styles united. 
Stigmas clustered. Fruit a fleshy berry, either spiny or scaly, hairy or 
naked.—About 100 genera and over 1,200 species, American. Mana of the 
plants are used for foods and for ornamental gardening. 
Plant copiously leafy, the leaves with broad blades, persistent. I. PERESKIEAE. 
Plants leafiess, or leaves obsolete or rudimentary, mere suc- 
culent seale-like deciduous structur 
Plants conspicuously jointed, Sono tes loosely so, the 
internodes (joints) relatively Short, more or less flat- 
ened: leaves mere thick deciduous scale-like structures: 
"ith 
ing a flat or more or less depressed umbilicus. II. OPUNTIEAE. 
Plants inconspicuously jointed, the internodes (joints) 
terete, grooved, or angled: leaves none se ete 
areolae without bristles, but spine-bear yp 
thium much prolonged beyond the hone pole iiem 
on the fruit or rotting off irregularly, or very short. 
