192 Floristik u. Systematik d. Phanerog. — Pharmaceut. u. Chem. 



making, the results are collected into a Soil Register, from wliich the 

 record of any species, its soils and habitat is prepared. The plants may 

 then be grouped into associations or formations. Smith (Leeds). 



WiTTMACK, L., Daiicus Carola L. var. Bolssleri Schweinfurt h. 

 Violette Mohrrüben. (Festschrift für Paul Ascherson. 

 Leipzig, Gebr. Borntraeger, 1904. p. 327—332.) 



Ueber dieselbe Arbeit ist bereits referirt aus Gartenflora, LIII, 1904 

 (cf. Bot. Centralbl. XCVI. n. 44. p. 477). Wangerin. 



Gruenberg, B. C. and W. J. Gies, Chemical Notes on 



Bastard Logwood. (Bulletin, Department of Agriculture, 



jamaica. Vol.' II. p. 241—250. 1904. Reprinted from the 



Bulletin of the Torrey Botanical Club. Vol. XXXI. p. 367 



—377. July 1904.) 



The investigations reported in this paper were undertaken owing 

 to the apparent increase in Jamaica of an unmerchantable variety of 

 iogwood, Haematoxylon campechianuni, known as bastard logwood. The 

 previous work of F. S. E a r 1 e (]ournal New York Botanical Garden. 

 Vol. IV. 3. 1903, and Bulletin, Department of Agriculture^ Jamaica. 

 Vol. 1. p. 30.) is summarized. The authors state their conclusions as 

 follows: 



1. The most significant fact shown by the elementary analysis of 

 the heartwood of typica! specimens was the lower carbon content of the 

 poorer wood, which may be due to lower pigment content, haematoxylin 

 being a Compound containing nearly twice as much carbon as oxygen. 



2. No morphological differences are discernible between red log- 

 wood and „bastard" logwood in the young seedlings. 



3. Analyses of the various seedlings agreed too closely to Warrant 

 any conclusion but that the metabolism of the seedlings was essentially 

 alike in the two varieties. 



4. The Chemical differences between red logwood and „bastard" 

 logwood are very slight, and are probably due to differences in amount 

 of pigment. 



5. Extractions with various solvents gave Solutions of different 

 colours, and also varying orders of intensity in the several series, indi- 

 cating the presence of at least two pigments in varying proportions. or 

 a pigment radical in different combinations. 



6. This was confirmed by the fact Ihat the order of colouration in- 

 tensity of a series of extracts was altered by diluting with water. 



7. Aqueous extracts of the two varieties of logwood gave different 

 reactions to acids, alkalies and other reagents. The differences are 

 parallel to those between a fresh aqueous Solution of commercial log- 

 wood „extract", and the same Solution after it had become discoloured 

 by long Standing. 



8. Attempts to determine the conditions of the discolourations of 

 Solutions of commercial „extract", failed to yield definite results, but in- 

 dicated, in general, that darkness and are are favourable to the change. 



The „bastard" logwood appears to be a distinct variety or sub- 

 species, diifering in physiological rather than in morphological characters. 



W. G. Freeman. 



Ausgegeben: 21. Februar 1905. 



Commissions-Verlag: E. J. Brill in Leiden (Hollard;. 

 Druck von Gebrüder Gotthelft, Kgl. Hofbuchdrucker in Cassel. 



