950 ARBORETUM AND FRUTICETUM. PART IT}. 
App. i. Other Sorts of Myricaria not yet introduced. 
M. squamdsa Desv., Ann. Sc. Nat., 4. p 350., Don’s Mill., 2. p. 728., is probably only a variety of 
M. dahurica. ; ‘ ‘ 
M. longifolia Dec., Don’s Mill., 2. p. 728.; Tamarix germanica Pall.; T. decandra Pall. ; T. 
longifolia Willd., M. linearifdlia Desv.) is a native of Siberia, at the Baikal, in saltish places. 
There are two forms of it described by Ehrenberg, in the Livmea. It grows to the height of 5ft. or 
ft. 
M. herbacea Desy., TAmarix germinica subherbacea Pall., appears to be a variety of M. ger- 
mAnica, as are, probably, all the other sorts above mentioned. The leaves and young shoots of this 
sort are used by the Mongolians as tea, and are administered by the priests of Tibet as medicine. 
M. bracteata Royle IMlust., p. 214. t. 44., is found in the vicinity of Cashmere. 
M. élegans Royle, |. c., is found at Lippa and Kunawar, where the climate resembles that of Tar- 
tary, and the soil is saline. ; Lie ‘ 
Both these Nepal species will probably prove hardy in Britain, when introduced. 

CHAP. XLVIII. 
OF THE HARDY LIGNEOUS PLANTS OF THE ORDER PHILADEL- 
PHA‘CEX. 
Tue hardy ligneous genera of this order are only two, and their charac- 
teristics may be taken together, as representing those of the order. 
PurtapE’LpHes L. Calyx with an obovate top-shaped tube that adheres to 
the ovary: the limb is in 4—5 parts. Petals 4—5, in estivation convo- 
lutely imbricate. Stamens 20—40, inserted into the throat of the calyx, 
in 1—2 series, shorter than the petals ; the filaments distinct. Styles 4—5, 
in some instances connate, in others more or less distinct. Stigmas 4—85, 
oblong or linear, in most instances distinct, in a few connate. Capsule half 
adnate to the calyx, of 4—5 cells, and enclosing many seeds. Seeds resem- 
bling sawdust ; individually awl-shaped, smooth, and included in an oblong, 
lax, membranous aril, that in some instances is fringed: they are grouped 
upon an angular placenta, in the angles of the cells. Albumen fleshy. Em- 
bryo inverted, almost as long as the albumen. Cotyledons oval-obtuse, 
flattish. Radicle rather taper, longer than the cotyledons, straight, obtuse. 
Shrubs or undershrubs, from the temperate regions of the northern hemi- 
sphere, and some of them from Western Asia. Leaves opposite, nerved, 
dentate or almost entire. Flowers white, pediceled upon axillary or ter- 
minal peduncles, that are branched in a trichotomously cymose, or in a 
somewhat panicled, manner, bracteated. (Dec. Prod., iii. p. 205.) 
Decuma‘ria L. Calyx with its tube bell-shaped; its limb with 7—10 teeth. 
Petals as many as the teeth of the calyx, alternate with them, oblong. 
Stamens thrice as many as the petals, 2 in front of every petal, 1 between 
every 2 petals, allin 1 whorl. Style 1, very thick, expanded at the tip into 
a disk that bears 7—10 radiating stigmas. Capsule of egg-like figure, ter- 
minated by the style and stigma, and connate with the calyx to higher 
than the middle. The calyx has 7—10 nerves, and is toothless. The cap- 
sule has 7—10 celis, is valveless, and opens irregularly near the rather 
prominent nerves of the calyx. Seeds numerous, oblong, each enclosed in 
a membranous aril, and obliquely affixed to the centre. A sarmentose 
shrub. Leaves opposite, glabrous, entire, or dentate at the tip. Leaf 
buds hairy with short reddish hairs. Flowers white, sweet-scented, ter- 
minal, disposed subcorymbosely. The sexes are sometimes dicecious in 
gardens. (Dec. Prod. iil. p. 206.) 
Devu‘rzz4 Thunb. is a genus closely allied to Philadélphus; and it is highly 
probable that some of the species will ultimately be found to be as hardy 
as those of that genus; but, as this has not yet been proved te be the case, 
we have treated it as only half-hardy. 
