290 Allgemeines. — Morphologie etc. 



Lee, H. N., The staining of wood fibers for permanent 

 microscopic mounts. (Botan. Gazette. LXII. p. 318 — 319.1916.) 



To avoid different difficulties, when simple Solutions of aniline 

 dyes, such as safranin, or reagents as Haidenhain's haematoxy- 

 lin are used, a saturated Solution of nigrosin in picric acid may be 

 employed. The method is briefly described. Further studies are 

 being carried on to determine the qualities of the method for 

 staining other types of material. Jongmans. 



Lloyd, F. E., Abscission in Mirabilis Jalapa. (Botan. Gazette. 

 LXI. p. 213—230. 2 Fig. PI. 13. 1916.) 



The abscission in Mirabilis is not procured by a Separation 

 resulting from the complete Solution and destruction of a layer of 

 tissue, as held by Hannig, and does not therefore constitute a new 

 type of abscission. The mode of abscission accords wholly, as to 

 all essential details, with that which has been shown to occur in 

 such forms as Gossypium, Aristolochia etc. Jongmans. 



Kirkwood. J. E., Bisporangiate cones of Larix. (Botan. Ga- 

 zette. LXI. p. 256—257. I Fig. 1916.) 



Abnormal cones were found on Larix occidentalis. The lower 

 half of the cone presented the normal appearance of the staminate 

 cone with the total absence of the scale. The upper half presented 

 the typical condition of the macrostrobilus with bract and scale. 

 Between these two portions were a few transitional structures 

 representing abortive bracts and scales. Jongmans. 



Levine, M., Further observations on chloranthy in Dro- 

 sera intermedia. (Botan. Gazette. LXII. p. 389—399. 3 Fig. PI. 13. 

 1916.) 



The first part of the paper contains a review on the researches 

 on propagation other than by seed for the genus Drosera (buds on 

 leaves, brood body resembling the gemmae of Marchantia), and on 

 floral anomalies. 



The writer discovered plants of D. intermedia, growing in water, 

 and at the apex of the flower stalk with a head of tentaculiferous 

 flowers. On superficial examination the small headlike inflorescences 

 seem to be mere Clusters of diminutive leaves. In reality the Cluster 

 is a group of chloranthic flowers, in which all or nearly all of the 

 organs assume the appearance and form of leaves. These abnormal 

 flowers are described and illustrated in details. The writer is con- 

 vinced that these chloranthic flowers serve as a means of vegetative 

 propagation. Jongmans. 



Mc Allister, F., The morphologv of Thallocarpits Cnrtisii. 

 (Bull. Torrey Botan. Club. XLIII. p. 117-126. PI. 4. 1916.) 



The author gives an historical review on the researches made 

 on this genus. The second part deals with his own observations. 

 The results are summarized as follows. Thallocarpus, as it occurs in 

 the vicinity of Austin, Texas, seems to be strictly dioecious. 

 The spores of the tetrad adhere after shedding and give upon ger- 



