CHAP. XXXV. RHAMNA‘CER. 541 
We have little doubt that all the above species would cross-fecundate, and, consequently, that the 
beautiful ultramarine blue of the flowers of C. aziireus, or some portion of it, might be given to C. 
americanus, which would be a very desirable acquisition. Indeed, there is such a close general 
resemblance between all the sorts described, that we cannot help suspecting that they are only races 
or varieties of one or two original forms. C. azireus, C. americanus, and C. velutinus when it can 
be got, ought to be in every collection. Where there is a conservative wall, and the choice is limited 
to half a dozen or a dozen plants, C. azireus, which continues in flower during the greater part of 
summer, ought undoubtedly to be one of them. 
App. I. Half-hardy Genera and Species of the order Rhamnacee. 
Spherocarya (from sphaira, a sphere, and caryon, a nut) edulis Wall. Fl Ind., ii. p. 371., Don’s 
Mill., ii. p. 27., is a native of Nepal, in forests, producing a fruit of a pale brown colour, the flesh of 
which is eaten by the inhabitants. It grows to a tree of 40 ft. in height, with ovate, alternate, smooth 
leaves, and racemes of greenish inodorous flowers. When introduced, it will probably be found not 
more tender than other Nipal trees. 
Condailia (in honour of Anthony Condal, M.D., the companion of Loefling in his voyages) micro- 
philla Cav. Icon., 6. p. 16. t. 525., Don’s Mill., 2. p. 27., (fig. 216.) is a spiny shrub, a native of Chili, 
a good deal resembling a Zizyphus. 
Sagerétia (named in honour of M. Sageret, member of the Royal Agri- 
cultural Society of Paris, a vegetable physiologist) Thetzans Brongn. 
Mém. Rham., p.52., Don’s Miil., ii. p.28.; the Rhamnus Theézans of Lin. 
Mant., 207., and the R. Théa of Osb. Itin., 232., is a shrub growing to the 
height of 4 ft., a native of China, where it is said the poor make use of 
the leaves instead of those of the true tea. The branches are divaricate, 
spiny at the apex. Leaves ovate, smooth, serrulated. Flowers somewhat 
panicled, glomerated, in terminal spikes, greenish. This species has not 
yet been introduced; though there are plants bearing the name of Rham. 
nus Theézxans in the garden of the London Horticultural Society, growing 
with great luxuriance, which appear to be only a variety of Ahamnus 
Alatérnus. 
S. oppositifolia Brongn., the Zizyphus oppositifdlia of Wall., and S. ha- 
modsa Peoteas, the Zizyphus hamdsa of Wall., are Nepal climbing shrubs, 
which have not yet been introduced; and which, though marked as 
a a the green-house, would doubtless stand against a conservative 
wall. 
Scitia (from scutum,a shield; in allusion tothe form of the disk of the 
flower) capénsis Brongn. Mém. Rham., p.55., Don’s Mill, ii. p.33.; the { : 
ARhamnus capénsis of Thunb., and Ceanodthus capénsis of Dec., is a Cape 
shrub, growing to the height of 4 ft.; introduced in 1823, and sometimes to be found in green- 
houses. 
Retanilla (yetanitla is the aboriginal name in Peru) obcordata Brongn. Mém. Rham., p. 57., 
Don’s Mill., ii. p. 34., the Rhamnus Retantila of Domb., and the Collétia Retanilla of Vent. Hort. 
Cels., t. 92., is a twiggy shrub, with white flowers, a native of Peru, where it grows tothe height of 
3ft. R.E/phedra Brongn.,the RhamnusL’phedra of Domb., and the Collétéa E’phedra of Vent. Choix., 
t.16.,is also a native of Peru. Both these shrubs are in the country, and are kept in green-houses ; 
but we have little doubt of their being as hardy as the plants of the genus Collétéa. 
Collétia (named by Commerson in honour of his friend and coun- 
tryman Collet, who wrote upon the plants of Brest) spindsa Kunth 
Nov. Gen. Amer., 7. p. 58., Hook. Bot. Miscel., 1. p. 153. t. 44 a, 
(fig. 217.) the Collétia polyacantha of Willd., is a native of 
Chili, Peru, and also of Brazil. It is a shrub with few and small 
leaves, but with numerous, very strong, awl-shaped spines. The 
flowers are of a reddish yellow, and whitish in the centre. This 
shrub has been tried in the open air, both against a wall and in 
the open border, in the Horticultural Society’s Garden; and, in 
1835, it had stood three years, without any protection, flowering 
freely in the summer season, from May to August. It has stood 
out for three winters in the open border in Buchanan's Nursery, ¢ 
Camberwell, without any protection, and against a wall in the 
Fulham Nursery. We think we can safely recommend it as a shrub 
for the open border, at least in dry sheltered situations. + 
C. serratifolia Vent. Choix., t.15.; the Rhamnus SpArtium of 
Domb., also from Peru; C. crucidta Gill. et Hook. Bot. Misc., 1. 
. 152, t. 43., from sandy hills in La Plata; C. féror Gill. et Hook., from Chili; C. ulécina Gill. et 
ook., the ulex, or furze-like Collétéa, also from Chili; C. Chacaye G. Don, the Rhamnus 
Chacaye of Domb., from Peru ; and C. tetragdna Brongn., also from Peru; are probably as hardy as C. 
spindsa. They will grow in any common garden soil, and are propagated by cuttings or seeds. 
Trevia (from Trevo, the name of some Spanish botanist) quinquenérvis Meyers in Hook. Bot. 
Misc., 1. p. 158. t.45. B, and Don’s Mill, 2. p. 35., and T. trinérvis, are spiny shrubs, growing to 
the height of 4 ft. or 6 ft.; natives of Chili,on the Andes, and probably as hardy as Collétia. The 
last species was introduced in 1828, 
Discaria (from discus, a disk ; the disk of the flower being very broad) americana Hook. Bot. Misc., 
1, t. 44. D., isa spiny shrub, a native of Buenos Ayres; and D. australis Hook. is a native of New 
Holland; neither of which has yet been introduced. 
Hovénia (in honour of D. Hoven, a senator of Amsterdam, who contributed to the success of 
the travels of Thunberg by_ his good offices) dédcis Thunb. is a fruit tree of Japan, where it is 
called ken, and kenpokonas. It has large, cordate, acuminated leaves, and small white flowers, The 
fruit is said to contain a sweet red pulp, which has ataste somewhat like that of apear. It was 
introduced in 1812; and a plant of it in the Botanic Garden at Kew has stood’ against a south wall 
since the year 1816. Another has stood in the Horticultural Society’s Garden since the year 1816; 
In both gardens, they have attained the height of the wall; and, though the young shoots are 
generally killed back in winter, when they receive no protection, yet the plants grow vigorously 
during every summer, The tree, which grows to the height of 12 ft. in its native country, is figured 
in Kempfer’s Amen. Ex., 2, p. 809. In 1830 there was a plant of this speciesin Knight’ 
10 ft. high, in a pot. dh) P speciesin Knight’s Nursery, 

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