No. 3, January, 1922] MORPHOLOGY, ETC., VASC. PLANTS 179 



MORPHOLOGY, ANATOMY AND HISTOLOGY OF VASCULAR PLANTS 



E. W. SiNNOTT, Editor 



(See also in this issue Entries 1017, 1040, 1042, 1094, 1285) 



1158. CosTANTiN, J. Note sur les collections micrographiques de la chairs de botanique 

 (organographie et physiologie). [Note on the micrographic collections of the chair of botany (or- 

 ganography and physiology).] Bull. Mus. Hist. Nat. [Paris] 26: 336. 1920. — The collection of 

 anatomical preparations of the laboratory of organography and physiology contains over 

 40,000 sections; these are principally of phanerogams. About 7,500 are of fossil plants. — 

 E. B. Payson. 



1159. CosTERUS, J. C. Dialyse du pistil de Rhododendron sp. [Dialysis of the pistil of 

 Rhododendron sp.] Recueil Trav. Bot. Neerland. 18: 231-235. 1 pi. 1921. — An Instance of 

 dialysis in Rhododendron is recorded. — /. C. Th. Uphof. 



1190. Haberlandt, Gottlieb. Physiologische Pflanzenanatomie. [Physiological plant 

 anatomy.] 5th ed., rev. and enlarged, 670 p. Leipzig, 1918. 



1191. LoNGO, B. Ricerche sul melo "senza fiori " (Pyrus apetala Miinch.). [Investigation 

 of an apple "without flowers."] Atti R. Accad. Lincei Roma Rendiconti (CI. Sci. Fis. Mat. e 

 Nat.) 292:290-291. 1920.— This plant was found to have minute pistilliferous flowers. The 

 flowers are not pollinated, not being visited by insects, but give rise to fruit without seeds. 

 The case is thus interpreted as one of true parthenocarpy. The ovaries contained ovules. 

 Trials at pollination succeeded, and seeds developed. — F. M. Blodgett. 



1192. Petri, L. Sulle cause di arresto di sviluppo dell' ovario nel fiore dell ' olivo. [On 

 the cause of the arrested development of the ovary in the flower of the olive.] Atti R. Accad. 

 Lincei Roma Rendiconti (CI. Sci. Fis. Mat. e Nat.) 29': 472-477. 1920.— The author disagrees 

 with the conclusions of Pirotta [see Bot. Absts. 6, Entry 133], who groups olives into 4 

 classes depending on the presence or absence of reduction in stamens or pistil or both. He cites 

 one of his previous publications to show that reduction of the pistil depends on surrounding 

 conditions, particularly on water supply to the tree or branch, and that the reduction of floral 

 parts varies in the same tree from year to year and in different parts of an orchard or tree 

 according to conditions. — F. M. Blodgett. 



1193. Prouty, W. F. A more phenomenal shoot. Science 54: 170. 1921. — Another shoot 

 [see Bot. Absts. 10, Entry 1196] from Paulovmia tomentosa is here reported to have made a 

 seasonal growth in 1920 of 21 feet 6 inches, with 24 internodes and a basal circumference of 10 

 inches. — C.J. Lyon. 



1194. Provasi, T. Contributo alio studio del nettarostegi. [Contribution to our knowledge 

 of nectar-protecting devices in flowers.] Nuovo Gior. Bot. Ital. 27: 154-206. 1920. — A review 

 is presented of previous work on the subject of nectar-protecting devices, followed by the 

 author's own investigation. The morphological classification of these "Saftdecken" reveals 

 many types commonly observed in various plant families, notably the Labiatae, Borraginaceae, 

 Scrophulariaceae, Solanaceae, and others. He sums up his general observations of the 

 morphology and anatomy of these structures and lists the names of the plants studied and 

 the classes to which they belong. — Ernst Artschwager. 



1195. Sears, Paul B. Variation in Taraxacum. Science 53: 189. 1921. — "Degree of leaf 



dissection is correlated with the age of a given rosette," older plants having leaves more dis- 

 sected. If they appear to have smooth, entire leaves, upon examination it will be found that 

 such leaves grow from younger branches. — C. J. Lyon. 



1196. Wells, B. W. A phenomenal shoot. Science 54: 13-14. 1921. — A shoot from a 

 trunk of Paulotonia tomentosa (Thunb.) Stend. grew to the length of 19 feet 5 inches in 1 season 

 (1919). [See also Bot. Absts. 10, Entry 1193.]— C. J. Lyon. 



