ERICETALS. 417 
ERIcETALS. 
Hypogynous exogens, with dichlamydeous flowers, symmetrical 
in the ovary, placents axile, stamens definite, embryo enclosed in 
copious fleshy albumen, stamens sometimes adhering to the corolla. 
Eighty-nine genera, one thousand two hundred and fifteen species, 
including Andromeda, dangerously acrid; Ledum, Kalmia, and 
Azalea, narcotic and dangerous; Rhododendron,.oily and narcotic; 
Arbutus, fruit narcotic, bark and leaves astringent. 
_ Exogenous trees and shrubs, with polypetalous flowers, in terminal 
ubs ; perfect monodelphous stamens ; two-celled signe npa CLXIV. Humiriaces. 
“i long membranous connective; leaves alternate, simple, wi 
eeds Ww: a 
ing longitudinally : lees pe oohenrag weualy's ed, their 
base s sometimes overlapping and half sheathing the 
Fi aso sn ous exogens, rarely undershrubs, with stems round, naked, 
et leafy i in the oo aring species ; half monopetalous flowers in ter- 
Taal racemes or solit ary ; the stamens since and perfect; loose-skinned 
f album. 
Steralees he Semes « exogens, with cau or pinnated igi ka a 
pad Cig tateag e€ stems, with polypetalous flowers; the stamens free, 
@, half scale-like, and — times bag number of the "petals: 
min ute en emtryo atthe base of a y album: All the known species 
Sao. exogen _ 
a wing on the roots of other trees, the stems bain 
colourless, without le leaves, but covered with scales, saving half m 
Soa — in terminal spikes or racemes; free stamens, elibertetts 
men ; dehic « pe, seeds ; and an embryo at the apex of the albu- 
hi 
tt Pwr an se and the position of the embryo distinguishes 
We meas at. cepa 
oe eemenoUs Splale orders, with evergreen leaves, entire, whor 
Ot opposite anthers, sti de 
Fi 
es rigid, monopetalous flowers, free definite CLXIX. Ericacez. 
a all “ope Fran sgpr ni or tight-skinned seeds, and and two-celled 
opening by y pores. 
Ertcera plants, from eouxw, “I break,” have dichlamydeous 
flow: ers, symmetrical in ie: ovary, axile placenta, definite stamens, 
: and embryo enclosed in a large fleshy albumen ; having polypetalous 
: owers in Humiriacew and Francoaces, monopetalous in Epa- 
erids and Ericacese, and half monopetalous in Pyrolaces and 
Monotropacen. 
: The Humrrrace® are trees or shrubs yielding a balsamic juice, 
2 all natives of the tropical parts of America. The balsam yielded 
DY Humirium floribundum is a yellow liquid, called Balsam of 
= Unix, resembling Copaiva and Balsam of Peru. 
_Epacrrpace, from em, “upon,” and axgoc, “ the top,” i 
: ce to its habitat on hill tops, are small trees and eee 
Temarkable for the great beauty of their flowers and the singular 
Structure of their leaves, which are alternate, rarely opposite, 
EE 
