VI 



THE GARDENERS' MAGAZINE. 



J^'NE 1, 1912. 



and, as this occurs quite «arly, it is always 

 a good plan to cover the ground occupied by 

 eremuri with heather, or bracken, all the 

 winter. If a careful watch is kept and a 

 liand-light is placed over the young groAvth 

 directly it pierces the soil, then little harm 

 will result from frost or cold rains and snow. 

 Such protection is especially necessary in the 

 Thames Valley, where spring frosts are often 

 so sudden and severe. 



IRONWEED.— H. S. T., Bournemouth: I 

 have a strong-growing perennial plant that 

 bears purplish flower heads late m the 

 autumn. It grows about 6ft. high, and has 

 an abundance of rough green leaves. The 

 name given me with the plant le evidently a 

 popular one and is Ironweed. I believe seeds 

 were brought from the United States.— Iron- 

 weed is a title given to a larc^e genus of com- 

 posites, chieHv natives of Xorlli America. 

 Yery few of the several hundred known spe- 

 cies are of any value for garden decoration, 

 although two^of them have some merit m 

 the semi-wild garden. Tlie botanical name of 

 the genus is Vernonia, and the species re- 

 ferred to arc Y. prjealta and Y. iHvv<Tpborac- 

 ensis. Youi plant is most probably tho latter. 



DKCOEATl Vi: AM>[TJMS.— «. C M., 

 Faversham : Although the genus Allium is 

 chietiy n<>1 ahle for its economic value and 

 the iuclusion of the onion, shallot, leek, and 

 garlic, I believe I saw some qnite decorative 

 species when in Italy a few years ago. Per- 

 haps you will tell me if I am right ; and, if 

 so, give the names of those kinds that would 

 be' useful in a warm garden.— There are seve- 

 ral species of alliums of considerable decora- 



tive value, but they are not commonly culti- 

 vated because of the onion-like odour emitted 

 by the crushed or cut stems and leaves. Ine 

 best are: A. neapolitanum, white; A. Moly, 

 bright vellow capital for the rock garden; 

 A C8eruleum,'blue, flowers in dense heads; 

 A. nigrum, violet; and the newer A. Schu- 

 berti. lilac. 



4, 



T. W., Falmouth.— Jasmiuum revolutum 

 C. F. G,, Exmouth.— 1, Lycium barbara" 



2, Anchusa italica; 3, Allium Molv; 



Cuphea emineus; 5, C.'miniata. 



M. P. S., Lynn.— 1, Erica Cavendishiana 



2, Dipladenia boliviensis ; 3, Polygonum 



BaLdschuanicum ; 4, Asparagus Sprengeri. 



J. B., For- 



miich 



A FAILING DIPLADENIA - 

 far: A gardener friend of mine is 

 grieved over the imminent loss of a fine Dipla- 

 denia Brearleyana, which has for many 

 vears covered the roof of a large stove, and 

 Won the admiration of all who have seen it 

 in liower. At present it is almost destitute 

 of leaves, and it is a very difficult matter to 

 suggest a cause for the trouble. There 

 are no insect pests present, but I send a 

 few leaves and portions of stem for your 

 inspection. The dipladenia is planted out, 

 and over it is a stage for ordinary pot stove 

 plants.— The leaves and stems sent show no 

 signs whatever of insect attack, nor is there 

 anything to suggest the careless use of strong 

 insecticides. We believe the last sentence of 

 your letter points to the source of trouble, 

 and that the condition of the soil and roots 

 is answerable for the collapse. It may be 

 possible to save the plant by lifting and re- 

 planting or potting it (if our presumption i^^ 

 found correct), and pruning it moderately 



hard. 



NAMES OF PLANTS. 



L. J., Harrogate.— 1, Oucidium Marshalli- 

 anum; 2, Odontoglovssum ardentissimum ; 3, 

 Epidendrum variegatum; 4, Vanda teres. 



CONTENTS, 



Answers to Corre-spondentfi ... . 



C h r yis a n t nvmiiis 



Exliibitions and Met'-tmgs 



Forthcoming Eng-a-gements ... . 



Japanesie Azaleas 



Meteorological Observatioms ... . 



Note of the AV^eek 



XoteiR from Scotland 



Rhododendron Dilatatum 



Work for tSire Week 



■ 



Portrait. 



Sir Harry J. Veiteh, V.M.H., F.L.S 



I - 



- - ■ 



> 4 



Page. 

 420 



416 



m 



416 

 419 



m 



41S 

 416 

 41» 



SuppleiTi-t'nt. 



The Royal International Horticultural Eihibi- 

 XX #<• ■■■ ■■■ *«0 



Illuetrationfi : Lilium myriophylluni ; Odontoglce- 

 eum eximium King George ; Hydrangea Sar- 

 genti ; A niagnifie-ent group of plantg, chiefly 

 with fine foliage; Begonia Princess Victoria 

 Loui^se ; Bras-so-cattleya The King; A remark- 

 ably fine exhibit of Cineraria^. Gloxinia*, etc.; 

 A ta«3tefully-deisigne<l Tudor Garden; An at- 

 tractive arrangement of New Holland and 

 other plants ; A ekilfully-constructed PergoU 

 with Graix^ Tines, etc. ; An effeetivo Rook 

 Garden; Cialoeolaria Bronze Age; A Shady 

 Pool; The Chaise Continuous Cloehe; The "Gar- 

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 New Double-cylinder Knap.^ack Spray; »w 



Cyaniding Machine. 



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