494 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Grcvillca robusta, G. Hilliana, G. longifclia, G. flexitGsa (easily 

 raised from seed), G. Preissei or Thelemanniana, Hakea acicularis 

 (bears white flowers in May), H. elliptica (has white flowers in July), 

 H. suaveolens, H. Victoria, Agnostus sinuatus, Protea, Rhopala corco- 

 vadensis (Roupala Pohlii) are all worthy of cultivation. The last 

 mentioned requires a warmer position than the others. — S. E. W. 



Prunes. By W. J. Allen (Agr. Gaz. N.S.W. vol. xxiv. pt. hi. 

 pp. 245-255 ; 8 figs.). — Prunes thrive in a well-drained loamy soil 

 with plenty of lime and potash. They like moisture and sunshine. 

 The surface soil must be kept loose and friable, and free from weeds. 

 The following varieties are recommended : ' Prune d'Agen,' ' Robe 

 de Sergeant,' ' Silver Prune,' ' German Prune,' ' Splendour,' ' Sugar,' 

 ' Fellenburg,' and ' Golden Prune.' Prunes are attacked by San 

 Jose scale, borers, fruit fly, red mite, aphis, and curculio. The 

 last pest is destroyed by spraying with arseniate of lead just as the 

 buds are opening and again when the petals are falling. Brown fruit 

 rot and shot-hole are treated with Bordeaux mixture or lime and 

 sulphur. — S. E. W. 



Prunus pennsylvanica (Bot. Mag. tab. 8486). — North America. 

 Family Rosaceae, tribe Pruneae. Tree, 30-40 feet high. Leaves 

 3-4 inches long. Flowers white, J inch across. — G. H. 



Prunus salicina Lindl. By E. Koehne {Not. Konig. Bot. Berlin, 

 vol. v. No. 50, pp. 287-288 ; Jan. 1913). — The paper contains a 

 discussion of the nomenclature of this species. The author finds 

 P. salicina to be identical with P. triflora, but that the former name 

 has priority. — R. B. 



Pyracantha crenulata and its variety, P. c. yunnanensis. By 



S. Mottet (Rev. Hort. May 1, 1913 ; 1 illustration and coloured 

 plate). — Two new Pyracanthas highly recommended, yunnanensis 

 bearing a heavy crop of deep orange-red berries, and of more robust 

 habit.— C. T. D. 



Puya chilensis. By R. I. Lynch (Gard. Chron. July 5, 1913, p. 2 ; 

 3 figs.). — Flowering of Puya chilensis in open air at Cambridge. 



E. A. B. 



Pycnostachys Dawei (Bot. Mag. tab. 8450). — Uganda. Family 

 Labiaiae, tribe Ocimoideae. Herb, stems 4-6 feet high. Leaves 

 narrow-lanceolate. Spikes 1-5 inches long. Corolla, deep blue, 

 3-4 inches long. — G. H. 



Pyrus ioensis (Bot. Mag. tab. 8488). — Central United States. 

 Family Rosaceae, tribe Pomeae. Tree, 20-30 feet high. Leaves 

 3-5 inches long. Flowers violet-scented, 2 inches across, in 4-7- 

 flowered corymbs. Fruit fragrant, yellowish-brown, globose. — G. H. 



