No. 2, September, 1920) HORTICULTURE 241 



flowers. From the second, 37 plants were obtained, but only five of them were sufficiently 

 Sturdy to bloom; all bore chamois, spotted flowers. One of the plants of the latter type was 

 then chosen for seed production, but was not isolated, though the plants winch produced 

 purple flowers were destroyed. From this plant 300 individuals were secured. Of these, 13 

 produced purple flowers, the remainder yellow flowers. A few of the plants were weak. The 

 variety probably will prove to be of value as an ornamental. Another hybrid between Digi- 

 talis purpurea and D. ambigua is more or less sterile and can not be propagated with sufficient 

 ease to make it of horticultural importance. — E. J. Kraus. 



182S. Perez, G. V. Vitalite des racines de Bougainvillea. [Vitality of the roots of Bou- 

 gainvilleas.] Rev. Hortic. 91: 380. Nov., 1919. — Cuttings of this plant, put out in 1916, 

 although they have not produced roots, are still alive and have not decayed. Small pieces 

 of roots which were split lengthwise are also well preserved. Ordinary cuttings of conifers 

 are preserved an equally long time in the open air, those of Junipcrus Cedrus may not start 

 roots for more than a year after they are planted out. — E. J. Kraus. 



1829. Pinelle, A. Robinia Kelseyi Hort. Rev. Hortic. 91: 339. Fig. 104. Sept., 1919. 

 — It is still uncertain whether this form is a true species of a hybrid between R. hispida and 

 R. pseudoacacia. It is a shrub or small tree and bears a superficial resemblance to both forms. 

 The flowers are pink and appear earlier in the season than those of either of the species men- 

 tioned. It is said to have arisen spontaneously in the nursery of a Mr. Kelsey, of Boston, 

 from seeds secured in the southern Alleghany Mountains. It is readily propagated by grafting 

 on R. pseudoacacia, but it is unknown whether it will reproduce true to type from seed. — 

 E. J. Kraus. 



1830. Pole-Evans, I. B. Our aloes. Their history, distribution and cultivation. Jour. 

 Bot. Soc. South Africa 5: 11-16. PL 2-3. 1919. — Aloe rockeries and gardens are becoming 

 fashionable in South Africa as they did in Holland and Britain at the beginning and in the 

 middle of the eighteenth century. There are many aloes of reputed South African origin 

 which have been under cultivation in Holland and England for at least one or two centuries, 

 but which today are unknown in South Africa. The first to be cultivated in European gar- 

 dens was A. succotrina Lam. — E. P. Phillips. 



1831. Quehl, L. Auswahl der Arten zu einer Kleinen Kakteensammlung. [Choice of 

 species for a small cactus collection.] Monatsschr. Kakteenkunde 29: 54-55. 1919. 



1832. Ragionieri, Attilio. Un bel problema per i biologi: Sulla comparsa dell'odore 

 nel fiore delle "Rosseline di Firenze" (Ranunculus asiaticus var.). [A good problem for biolo- 

 gists : on the appearance of odor in the flowers of the Florentine "rosseline" (Ranunculus asi- 

 aticus).] Bull. R. Soc. Toscana Orticult. 44: 87-94. 1919.— He reports an experience with 

 Ranunculus asiaticus, that had a marked rose odor not characteristic of the variety. Seed- 

 lings resulting from selfing the flowers of this plant showed this odor to a reduced extent. 

 The strain had been grown on the same land since 1844 producing both vegetatively and as 

 seedlings. He thinks that there was no chance for the odor to have been introduced by 

 crossing with another variety, and that it is the reappearance of an ancestral character.— 

 W. H. Chandler. 



1833. Riccoboxo, Vincenzo. La prima fioritura in Europa del Pilocereus Dautwitzii Fr. 

 A. Haage. [The first flowering in Europe of Pilocereus dautwitzii Fr. A. Haage.] Bull. R. 

 Soc. Toscana Orticultura 44: 94-96. 1919. — Description of Pilocereus dautwitzii, introduced 

 into Italy from northern Peru. Observations on its behavior. — W. H. Chandler. 



1834. Ringelmann, M. Murs garnis de Lierre. [Ivy-covered walls.] Rev. Hortic. 91: 

 363. Fig. 111. Oct., 1919. — It is believed by many that climbing plants, especially English 

 ivy, are destructive to the walls upon which they grow. As a matter of fact, if young plants 

 of English ivy are originally planted about If or 2 feet from the base of the wall, when they 



