July 16, 1910 



HORT I CULTURE 



69 



Notes From the Arnold Arboretum 



The Mock Oranges were this year in very good con- 

 dition and flowered profusely; particularly the numer- 

 ous hybrids raised by Lemoine of which there is a good 

 collection at the Arboretum attracted much attention. 

 One of the most distinct is Philadelphus purpureo-macu- 

 latus which differs from all the other hybrids in the 

 purple blotch at the base of the white petals. It is a 

 neat little shrub not exceeding two or three feet in 

 height with spreading and arching branches clothed 

 witTi small lustrous nearly entire leaves from one to one 

 and a half inches long; the flowers measure nearly two 

 inches across and appear singly or in threes along the 

 branches. It is supposed to be a hybrid of P. Lemoinei 

 and P. CouUeri, a Mexican species with the flowers 

 marked with a purple blotch in the centre, but too ten- 

 der for our latitude ; the hybrid, however, is quite hardy. 

 One of the most beautiful of the group of hybrids called 

 P. Lemoinei and raised by crossing and recrossing P. mi- 

 croplujllus with other species and hybrids is var. Ava- 

 lache, a vigorous growing shrub attaining six feet in 

 height with long gracefully arching branches which form 

 when in full bloom a veritable fountain of flowers. The 

 individual flowers measure about one and a half inches 

 across and appear in clusters of five to seven along the 

 slender branches ; like most others of these hybrids they 

 exhale a delicious fragrance. As floriferous and as vig- 

 orous as the preceding, but of upright habit, is var. 

 Pavilion blanc with fragrant flowers about two inches 

 across and borne in clusters of five to seven along the 

 whole length of the branches. Lower and upright is 

 var. Candelabre with the flowers in threes and about 

 two inches across; the petals are fringed on the margin. 

 Another fine variety is Gerhe de neige of upright habit 

 and with large fragrant flowers. Very large flowers 

 more than two inches in diameter has Rosace; they ap- 

 pear in clusters of three along the branches ; it is a 

 vigorous shrub with comparatively large leaves. An- 

 other large-flowered variety is Conquete with the flowers 

 about two and a half inches across and presenting on 

 account of the rather narrow petals distinctly the shape 

 of a cross; they are borne in clusters of seven to nine 

 along the branches which flnally bend over under the 

 weight of the flowers. Very handsome are the double- 

 flowered varieties. One of the best of them is Boule 

 d' argent with very double fragrant flowers generally in 

 clusters of five ; it is a low shrub with rather small neat 

 foliage. Perle blanche which is of more vigorous growth 

 has semi-double flowers about one and three-quarters of 

 an inch across and borne in clusters of three to seven. 

 Another variety with semi-double flowers is Manteau 

 d'hermine with arching branches loaded with semi- 

 double flowers in clusters of three to seven. All these 

 varieties merit to be better known and are well worth a 

 place in our shrubberies. They are easily propagated by 

 cuttings and not very particular as to soil and situation. 

 Besides these varieties one of the most showy and beau- 

 tiful is our native P. inodorus with its gracefully arch- 

 ing branches clothed with lustrous foliage and end of 

 June studded their whole length with large cup-shaped 

 flowers. Of the new Chinese species perhaps the most 

 : distinct is P. sericanihtis with its handsome foliage pur- 

 } plish when young and the spreading racemes of nearly 

 ^ drooping flowers which give the shrub soniewhat the 

 appearance of a large flowered Deutzia of the type of 

 Deutzia scabra (T). crenaia). 

 ^ Among the Loniceras now one of the most striking is 

 ■^ Lonicera minuti-fiora with its bright orange red berries 

 appearing in great profusion : though this Honeysuckle 



is in bloom with its rather small whitish flowers one of 

 the less attractive kinds, it is well worth a place in the 

 shrubbery for its bright fruits. Also L. muscaviensis is 

 now very fine with its branches heavily loaded with dark 

 red berries. 



A decided improvement on the well known Potentilla 

 fruticosa is P. Fridrichsenii, a cross between that spe- 

 cies and P. davurica; it is of more upright and compact 

 habit and more vigorous, attaining a height of about four 

 feet ; the foliage is of a brighter green and the pale yel- 

 low flowers are larger, about one and a quarter inch 

 across, and appear in great profusion during June and 

 July. 



Trans-Atlantic Notes 



BERLIN-, CHAELOTTENBURG, SCHONEBERG, ETC. 



The central attractions for visitors to Berlin this sea- 

 son will be the balcony competitive decorations. Greater 

 Berlin enjoys the reputation of possessing more bal- 

 conies than any other cities. The displays will enable 

 natives and strangers to judge of the delightful effects 

 of a general scheme of balcony, window and facades of 

 business premises when tastefully carried out. 



THE FOUNDING OF A ROSARIUM AT BRITZ, NEAR BERLIN 



The mimicipality of Britz intends to establish a great 

 rose garden to be devoted to the use of the public on a 

 small charge for admittance. It is to be a Paradise of 

 roses, in which every flower will be allowed to open full 

 and no cutting permitted. This park will be laid out in 

 landscape fashion together with architectural embelish- 

 ments which will make it one of the sights of the world. 



THE GARDENS AT TRENTHAM 



It is announced in the gardening press that the Duke 

 of Sutherland has decided to throw open to the public 

 the famous gardens at Ttentham Hall, Staffordshire, 

 and they were opened for the first time on June 16 on 

 payment ol sixpence for each visitor. 



KALANCHOES 



These African plants, natives in the case of some of 

 the species of Somaliland, are making way in gardens 

 rapidly, for while coming from tropical regions, they 

 are found to flower and thrive under a comparatively 

 cool temperature. Kalanchoe flammea has orange scar- 

 let blooms, half an inch in diameter, arranged in 

 branched corymbs. K. Kewensis excelsior possesses 

 coijmbs ten inches in diameter, furnished with numer- 

 ous flowers of a rich rosy purple tint. The variety is 

 a sport from K. Kewensis, itself a cross of K. flammea 

 and K. Pentii. A plant of the variety was shown by 

 Messrs. J. Veitch & Sons at the meeting of the E. H. S., 

 on June 31. K. Dyerii is a recent addition to the genus 

 — a plant of vigorous growth, having broad, glaucous 

 green leaves and stout spikes about li-o feet in height, 

 carrying wax-like, tubular flowers, white, IV) inches in 

 length. 



The flowers of Kalanchoes are useful for cutting, 

 lasting fresh from ten to fourteen days. Seeds of most 

 of the varieties may be obtained of seed houses of re- 

 pute. Tlie plants, if treated as is customary with Ka- 

 losanthe coccinea, only slightly warmer till they come 

 into bloom, are easily grown. Over large pots should 

 not be employed. 



