History Of Clematis

The name ‘clematis’ is derived from the Greek
word klema, meaning vine branch or vine-like.
It is possible that even before the use of the word
‘Klema-tis’ the whole genus was known as atragene,
meaning ‘firecracker’ in Greek. Apparently, when large
dry stems of C. vitalba are placed in a fire, the heat
causes them to split, making a noise like firecrackers.
Although the Atragene group now embraces C. alpina,
C. macropetala and similar North American species,
atragene was at one time used as a name for C. vitalba.

In the 1870s, Thomas Moore and George Jackman stated in their book “Clematis
as a Garden Flower” that the genus was at that time split
into four different sections. They defined them thus:

  • C. flammula, in which the flowers are without
    involucre or petals and the achenes or seed-like fruits
    are lengthened out into a bearded, feathery tail- represented by C. flammula.
  • C. viticella, in which the flowers are as in C. flammula, but the achenes have only a short, and not a
    plumose, tail – represented by C. viticella.
  • Cheiropsis, in which there are two bracted
    calyx-like involucres at the top of the pedicels, no
    petals and a bearded plumose tail to the achenes – represented by C. calycina [now C. cirrhosa].
  • Atragene, in which there is no involucre, the
    outer stamens passing gradually into the petaloid staminodes and the achenes having a bearded plumose tail
    – represented by C. alpina.

Moore and Jackman also recorded that in 1877 scientific records showed that some 230 clematis species had
been identified. Of these, some 17 were European,
chiefly occurring in the southern and eastern regions;
43 were of Indian origin; 9 were Javanese; approximately 30, comprising some of the finest species, came
from China and Japan (we now know that 108 species
are native to China); 11 were from the Siberian regions; 2 were from the Fiji Islands; 24 were from South
America; 9 species were from Central America and the West
Indies; 35 species were North American; 14 species
came from tropical Africa; 4 were from South Africa; 6
species were from the Mascarene Islands and Madagascar; 15 species were recorded as coming from
New Holland (Australia) and 5 from New Zealand. Many of
these species have lost favor and are obviously not now in cultivation.

The 16th-century introductions

The early records show  that some of the European
species started to find their way to British gardens as
early as 1569. When C. viticella was introduced, the
only clematis found in British gardens up until then was
the native C. vitalba, a rampant scrambler and climber
that reaches 9-12m (30-40ft). C. vitalba’s greatest contribution to the British countryside is, of course,
its marvelous fluffy seed heads, which are outstanding on a
frosty winter’s day. C. viticella was to become a most
important species in the early breeding work and can
still help improve today’s clematis, especially when one
remembers that neither it nor its small-flowered cultivars succumb to clematis wilt. Its other great asset is its
very free-flowering habit.

By the end of the 16th century, other European clematis had arrived on English shores: C. cirrhosa, C .flammula,
C. integrifolia and C. recta. Because it is only semi-hardy
C. cirrhosa has not established in English gardens other
than in milder climates, which is a great shame as it has
attractive winter flowers and evergreen foliage. A larger flowered cultivar, C. cirrhosa ‘Freckles’ appears more winter hardy and its flowers
are borne in late autumn and early winter in England.

C. flammula is a very variable species and again it has not established widely in British gardens, perhaps because of its preference
for dry, free draining soils. It is to be hoped that its variable habit will
allow a form to be found that will establish well in the
British Isles and countries of similar climatic conditions.

C. integrifolia is a most useful mixed border flower,
together with some of the more recent introductions of
good blue, pink and white forms, as well as the marvelous cultivar C. integrifolia ‘Pangbourne Pink’.

C. recta is another very variable species, varying in
flower size, form and height from plants that grow only
to 90 cm (3 ft) to those reaching 1.8-2.1 m (6-7 ft).
Good selected forms of C. recta should be found to
enhance gardens both in Europe and in North America.

The 18th & 19th-century introductions

There were no introductions to the British Isles in the
17th century, but in the first quarter of the 18th century
two useful American species, C. crispa and C. viorna,
were introduced. Both should have been used more
extensively in breeding work than they have been. C.
crispa has scent to offer and the most delightful nodding
flowers, and one of its progeny, C. viticella ‘Betty Corning’, has retained the scent. C. viorna, which is
extremely free-flowering and has delightful seed heads,
is a must for future breeding work.

Further 19th-century introductions

During the 19th century various species were introduced into the British Isles from many areas around the
world. C. florida ‘Sieboldii’ was introduced in the
1830s, but as it is sterile it was not possible to use it in
breeding. However, the most important introductions
during the 19th century which gave the breeders the
greatest opportunity of all time to create new cultivars
were C. patens and its cultivars in the 1830s, the amazing C. lanuginosa in 1851 and C. ‘Fortunei’ and C.
‘Standishii’ in 1863. After the arrival of these species
and cultivars from Japan, the breeders of the British
Isles, France, Belgium and Germany embarked upon a
race to produce the best, most colorful cultivars.

The development of cultivars

One of the earliest clematis cultivars ever raised – possibly the first – was C. ‘Eriostemon’,
though according to the Swedish nurseryman Magnus Johnson its origin is not
known exactly. This clematis was probably raised in Belgium
or the Netherlands before 1830. The clematis was described and
pictured by Decaisne in Revue Horticole in about 1852,
C. ‘Eriostemon’ being the result of a cross between C. viticella and C. integrifolia.

The next cultivar raised was C. ‘Hendersonii’ in 1835,
produced also from crossing C. viticella with C. integrifolia. It was raised by
Mr. Henderson in the Pine Apple
Place Nursery, London. It was flowered for the first time
by Mr. Chandler of Vauxhall, London, and has sometimes been called C. chandlerii. In the nursery trade, C.
‘Eriostemon’ and C. ‘Hendersonii’ are frequently sold
incorrectly under the same name of C. x eriostemon
‘Hendersonii’, although they are two distinct flowers.

Although these two plants are very similar, coming
from the same parentage, there are differences. Magnus
Johnson describes the main difference as follows. Stem
leaves near to the base of C. ‘Eriostemon’ are entire,
broadly ovate or three to five-lobed; in C. ‘Hendersonii’, the stem leaves are entire, narrowly ovate or
three-lobed. In C. ‘Eriostemon’, the upper stem leaves
are pinnate with generally five acutely elliptic segments
and in C. ‘Hendersonii’ the upper stem leaves are pinnate with five to seven lanceolate segments.
The flowers are virtually the same in form, with tepal size slightly
larger in C. ‘Eriostemon’. The flower buds differ slightly also, with C. ‘Eriostemon’ having nodding,
comparatively short conical buds, while C. ‘Hendersonii’ has long conical buds.
The other flower components vary only slightly.

The large-flowered cultivars
The most important step towards producing the very
large-flowered clematis of today was made by Isaac
Anderson-Henry of Edinburgh, Scotland, in 1855,
when it is recorded that he crossed C. patens azurea
grandiflora with C. lanuginosa. The resulting cultivar
was C. ‘Reginae’, which was described as a handsome
lavender-colored cultivar of intermediate character. It
was shown in London in 1862 and gained a Certificate
of Merit. Shortly afterwards, Anderson-Henry bred the
world-famous C. ‘Henryi’ and C. ‘Lawsoniana’. His
detailed account of these later cultivars appeared in the
Moore and Jackman book of 1877, where he described
the crosses as coming from C. lanuginosa as the female
or seed-bearer and C. ‘Fortunei’ as the male parent. C.
lanuginosa and C. ‘Fortunei’ have long since been lost to
cultivation but fortunately C. ‘Lawsoniana’ is still in
commerce, although not grown widely, and C. ‘Henryi’
is sold in large quantities. Anderson-Henry recounts
with excitement that ‘Lawsoniana’ had flowers which
could reach up to 24 cm (9 1/2 in) across and describes his
disbelief in the blue of this cultivar being considerably
darker than either parent. C. lanuginosa is described as pale lilac and C. ‘Fortunei’ as having pure white
semi double flowers. He points out that C. ‘Fortunei’ is probably a seedling from C. ‘John Gould Veitch’,
a plant introduced from Japan in 1862 by Robert Fortune.

In cultivation cultivars with the C. lanuginosa type of habit produce flowers that have
sported. One of these was C. ‘Blue Gem’, which should
normally have pale lilac blue flowers with red anthers.
If C. lanuginosa was found in a
churchyard, by the time it was collected by Robert Fortune it may have already been a cultivated variety
which had been planted in the churchyard. Further
research needs to be done in this area.

The 19th-century nurseries and breeders

Next in order of the new cultivars of the 19th century
came the Woking hybrids, raised by Messrs George
Jackman and Sons. These were the result of using C.
lanuginosa with C. ‘Hendersonii’ and C. viticella
atrorubens during the summer of 1858. The first plants
reported to have bloomed were those named C. ‘Jackmanii’ and C. rubroviolacea in 1862. These were shown
in 1863 in Kensington, presumably to the Royal Horticultural Society, receiving Certificates of
Merit in the
first class. C. ‘Jackmanii’ was to become one
of the most outstanding clematis ever raised. Its free flowering habit and
masses of flowers of a deep, intense violet-purple are easily recognizable on
archways and porches throughout Europe and North America, where this clematis is particularly winter hardy.

In Europe, great work on producing new cultivars was
also well underway. The British often criticized their
European counterparts for producing clematis with
gappy flowers, but the Europeans did rather well with
the depth of flower color. The most successful European
breeders were the Moser family, who gave us C. ‘Nelly
Moser’ in1897 which, along with C. ‘Jackmanii’, is perhaps still one of the best-known clematis in the world.
C. ‘Marcel Moser’ was introduced in 1896 but, overshadowed by the color and impact of ‘Nelly Moser’, it
is somewhat forgotten today.

Other notable European contributors to clematis
breeding during the latter half of the 19th century were
M. Simon-Louis of Metz, M. Rim of Frankfurt, M.
Carre of Troyes, M. Dauvesse of Orleans, M. Modeste-Guérin and M. Bonamy Frères.

Some 40 or so of those early cultivars are still listed by
today’s nurseries and sold in garden centers around the
world. Included among them is C. ‘Fair Rosamond’,
raised in 1881, which is still one of the few large flowered cultivars to have
slight scent. During the 1880s, further cultivars were raised but some of the
excitement had died down. One good clematis, C. ‘Beauty of Worcester’, raised by
Messrs Smiths of Worcester around 1890, is still in cultivation. Its stunning double purple-blue
flowers must have caused a sensation when this clematis was introduced.

The 20th-century

By the turn of the century clematis wilt had started to
appear and A. E. Jackman gave a lecture on the ‘sickness’,
as it was called, to the Royal Horticultural Society. The
interest in breeding subsided considerably as the sickness
caused by clematis wilt (Phoma clematidina) became a
serious threat to clematis nurserymen. The introduction of the various cultivars of C. patens from Japan
and the inbreeding that subsequently took place of what
was probably already inbred stock certainly would not
have increased the plants’ vigor. By this time, nurserymen were using C. vitalba or C. viticella as understock for
grafting clematis, but using these, and particularly C.
vitalba, did not help the sickness problem.

Plant collectors such as George Forrest and Ernest
Wilson continued to bring back clematis species from
China, increasing the range available until just before
the First World War. Some of the most useful garden
clematis brought back at that time were C. armandii and
C. montana var. rubens in 1900, C. rehderiana in 1908,
C. chrysocoma in 1910, C. fargesii (now known as C.
potaninii var.fargesii) in 1911 and C. macropetala in 1912.

This was a period in which three men in particular
made a notable contribution to the development of
clematis as a garden flower: William Robinson, Ernest
Markham  and Percy Picton.

The plant named after Markham, C. ‘Ernest Markham’, is a bestseller
worldwide. Grown and introduced by Jackmans of Woking from seedlings raised at
Gravetye after Markham’s death in 1937, it has recently been awarded the RHS
Award of Garden Merit.


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