NATURAL OKDEflS. 
•eiidulous. Fruit indehiscent, crowned by the adhering calyx. 
a. Properties : the baik is astringent, used as a febrifuge and for tanning ; thf 
fruit is sweet and edible. 
G ENUS. — Rhizophora, 
451. Onagrace^, the Evening Primrose Tribe. — Herls oX 
shrubs. Leaves simple, alternate or opposite. Calyx tubular, 
adherent to the ovary. Petals usually 4 (rarely 3 or 6), in- 
serted into the tube of the calyx. Stamem as many as the 
petals, or twice as many ; filaments distinct ; pollen triangular, 
usually cohering by threads. Ovary 2-4:-celled ; styles united. 
Fruit capsular or succulent. Seeds without albumen ; embryo 
straight. 
a. Properties : some species yield edible fruits and seeds, many are mucilaginous, 
a few are astringent. 
Genera. — Jussieu, Ludwigia, (Enothera, Clarkia Epilobium, Fuchsia, Gaura 
Circaea. 
452. Sub-order, HALORAOEiE. — Aquatic herbs^ or undershrubs^ 
often apetalous. Seeds solitary, furnished with little albumen, 
as in Myriophyllum and Hippuris, where the limb of the calyx 
is almost wanting ; petals none ; stamens reduced to a single 
one ; the ovary 1-celled. 
Genera. — Hippuris, Myriophyllum, Serpicula, Proserpinaca, 
453. Cactace^, the Cactus Tribe. — Succulent shrubs., with 
angular or flattened stems and spinous buds, often leafless. 
succulent, 1-celled. Seeds numerous, without albumen ; embryo 
straight, curved, or spiral. 
a. Properties : fruit mucilaginous, eatable. 
Genus. — Cactus. 
454. GROssuLACEiE, the Currant Tribe. — Small shrubs. Leaves 
alternate, lobed. Flowers in racemes or small clusters. Calyoo- 
tube adherent to the ovary, 5-lobed, sometimes colored. Petals 
minute, alternate with the segments of the calyx. Stamens 5, 
inserted on the calyx. Ovary 1-celled. Fruit a berry, crowned 
with the remains of the flower. Seeds immersed in pulp, and 
attached to two, opposite, parietal placentas ; albumen horny ; 
embryo straight, minute. 
a. Properties : fruits edible, sometimes containing malic acid. 
Genus. — Ribes. 
455 LoASACE^. — fferbs^ usually clothed with rigid or sting- 
