36 GENETICS [BoT. Absts., Vol. IX, 



224. Dahlgren, K. V. Ossian. Pelargonium-chimar. [A Pelargonium chimera.] Svensk 

 Bot. Tidskr. 15: 171. 1921. — Lecture given in the botanical section of the Natural Science 

 Society of Uppsala, Sept. 28, 1920. In a Pelargonium chimera in the botanical garden in 

 Uppsala a shoot was found which had the green and the chlorophyll-defective parts of tissue 

 interchanged. — K, V. Ossian Dahlgren. 



225. Dahlgren, K. V. Ossian. Sjalfsteriliteten hos Lysimachia nummularia. [On 

 self-sterility of Lysimachia nunmiularia.] Svensk. Bot. Tidskr. 15: 164. 1921. — Lecture 

 given in the botanical section of the Natural Science Society of students in Uppsala, April 

 29, 1911. Pollination between individuals from different countries caused fructification. — 

 K. V. Ossian Dahlgren. 



226. Daniel, Lucien. Reactions antagonistiques et role du bourrelet chez les plantes 

 grefifees. [Antagonistic reactions and the role of the fusion layer in vegetable grafts.] Compt. 

 Rend. Acad. Sci. Paris 170: 1512-1515. 1920.^ — Every true graft leads to the formation of a 

 fusion layer at the union of stock and scion. This layer modifies conduction and establishes 

 an antagonism between the parts, without which the grafts would be unable to live. As a 

 result, the stock and scion are in different biological states. An examination of grafts has 

 shown that there may be a passage of certain substances and a retention of others at the layer, 

 or either a passage or retention of the same reserve product. These translocations of sub- 

 stances, with the resulting changes in biological states, have caused many unusual variations, 

 particularly in the mode of development of the restorative parts. Adventitious roots or 

 branches which develop may be of the true nature of stock or scion, or may in exceptional 

 cases form graft hybrids. Various types of behavior of these restorative growths, both of 

 roots and branches, are described. — A. C. Eraser. 



227. Ernst, A. [German rev. of: Hoar, C. S. Sterility as the result of hybridization 

 and the condition of pollen in Rubus. Bot. Gaz. 62: 370-388. 3 pi. 1916.] Zeitschr. Bot. 13: 

 260. 1921. 



228. Grier, N. M. Notes on Hemerocallis, II. Torreya 21: 12-13. 1921.— The writer 

 presents the results of a series of experiments made in 1917 on Hemerocallis fulva, to deter- 

 mine whether the plant sets seed. Four groups of experiments were conducted: (1) Fertili- 

 zation of the flowers with their own pollen; (2) fertilization with pollen from the same clump 

 of day-lilies; (3) fertilization with pollen from a far-removed clump; (4) fertilization with 

 pollen from H. flava. The results were in all cases negative. No mature seeds were ever 

 found. — J. C. Nelson. 



229. Harder, R. [German rev. of: (1) Sperlich, Adolf. Die Fahigkeit der Liniener- 

 haltung (phyletische Potenz), ein auf die Nachkommenschaft von Saisonspflanzen mit festem 

 Rhythmus ungleichmassig iibergehender Faktor. (Capacity to maintain lines (phyletic potency), 

 a factor distributed irregularly to the offspring of plants with fixed seasonal rhythm.) Sitzungs- 

 ber. Akad. Wiss. Wien 128: 379. 1919.— (2) Idem. tJber den Einfluss des Quellungszeit- 

 punktes, von Treibmitteln und des Lichtes auf die Samenkeimung von Alectorolophus hirsutus 

 All.; Charakterisierung der Samenruhe. (On the influence of the time of application of forcing- 

 agents and of light on the germination of seeds of Alectorolophus hirsutus. Characterization 

 of seed rest.) Sitzungsber. Akad. Wiss. Wien 128: 477. 1919.] Zeitschr. Bot. 13: 264-266. 

 1921.— [See also Bot. Absts. 4, Entry 3412.] 



230. Hector, G. P. Report of the Imperial Economic Botanist. Sci. Rept. Agric. Res. 

 Inst. Pusa 1919-20: 46-57. 1920. — Tests of varieties of wheat developed at Pusa are continued 

 for yield, strength of straw, and rust resistance.— Wilt in Indigofera tinctoria (indigo) is found 

 to be due to poor root development brought on by water-logging. New root and nodule for- 

 mation begins in April, and proceeds slowly till the monsoon begins, and is then rapid. Java 

 indigo is being improved by mass selection, as plants under bags do not produce seeds. — Linum 

 usitatissiminn (flax) is self-pollinated; breeding and selection are in progress. Breeding 



