174 MORPHOLOGY, ETC., VASC. PLANTS [BoT. Absts., Vol. VIII, 



MORPHOLOGY, ANATOMY, AND HISTOLOGY OF VASCULAR 



PLANTS 



E. W. SiNNOTT, Editor 



(See also in this issue Entries 779, 788, 943, 1013, 1019, 1021, 1041, 1044, 1085, 1342, 1367, 



1374, 1429, 1494) 



1206. Beltea, H. C. Ray tracheid structure in second growth Sequoia Washingtoniana. 

 Bot. Gaz. 68: 467-476. 5 fig. 1919. — Second growth trunks of Sequoia washingtoniana are 

 wanting in true ray tracheids; instead, vertical wood tracheids bend at the ray, and are con- 

 tiguous thereto for some little distance. Communicating pits develop in these contiguous 

 walls of rays and tracheids. These modified vertical tracheids are believed to function as 

 ray tracheids.— iJ. C. Cowles. 



1207. BoTTTGUES, H. Le meristeme terminel de la tige et sa division en regions. [The 

 terminal meristem of the stem and its division into zones.] Compt. Rend. Acad. Sci. Paris 

 171:926-927. 1920.- — Two regions of the meristem, a prevascular and a cortical zone, are 

 distinguished. — C. H . Farr. 



1208. BuGNON, P. Sur I'emploi d'encres commerciales en histologic vegetale. [On the 

 use of commercial inks in vegetable histology.] Compt. Rend. Acad. Sci. Paris 169: 1051- 

 1054. 1919.- — Commercial inks having a base of tannin and iron sulphate have been success- 

 fully employed in the staining of pectin-cellulose membranes, giving a blue which is adapted 

 to the use of a counter stain of red, brown, or green. Inks having log-wood (haematoxylin) 

 as a base have also been shown to be satisfactory for certain purposes. Formulas for the 

 preparation of ink stains with various other stains are given. — V. H . Young. 



1209. Detjen, L. R. Peloria in Viola primulaefolia Linn. Torreya 20: 107-116. Fig. 

 1-11. 1920. — Peloria in European species of Viola {V . odorata and V. hirta) has been known 

 since 1775. Two forms are recognized, the incomplete and the complete. A plant of V. 

 'primulaefolia was discovered at West Raleigh, North Carolina, producing flowers not only 

 with all the various forms of peloria, but with a general reduction and tendency toward 

 numerical uniformity in all the floral whorls. In this plant the flower was not only perfectly 

 reguljtr but all the parts were in fours. Otlier plants collected at the same station possessed 

 from 1 to 4 saccate petals, and showed variations in the number and character of parte in 

 each floral whorl. Plants grown from seed of these peloric plants produce peloric flowers, 

 which remain uniform under great differences of environment, and such plants apparently 

 breed true to type both vegetatively and sexually. — J . C. Nelson. 



1210. Gatin, V. C. Recherches anatomiques sur le pedoncule et la fleur des Liliacees. 

 [An anatomical study of the peduncle and flower of the Liliaceae.] Rev. Gen. Bot. 32 : 460-528. 

 Fig. 32-55. 1920. — A continuation of the anatomical study previously reported. In this 

 number the 10th tribe of the Lilioideae is covered, together with the tribes of the sub-family 

 Asphodeloideae and 5 tribes of the sub-family Asparagoideae. — /. C. Gilman. 



1211. Land, W. J. G. Botany of the living plant. [Rev. of : Bower, F. O. Botany of the 

 living plant, x -f- 580 p., U7 fig. Macmillan: London, 1919 (see Bot. Absts. 4, Entries 526, 

 1394; 7, Entry 1608).] Bot. Gaz. 68:478-479. 1919.— The book is highly praised for its 

 embodiment of long years of first-hand contact with material and of long teaching experience. 

 The gymnosperms are felt to be inadequately treated, and minor criticisms are noted in the 

 treatment of the liverworts. — H. C. Cowles. 



1212. ScHAFFNER, JoHN H. A remarkable bud sport of Pandanus [utilis]. Jour. Hered- 

 ity 10: 376-378. Fig. 14. 1919. — The bud sport (mutation) shows a two-ranked arrangement 

 of the leaves without spiral twist as opposed to the normal three-ranked arrangement with 

 spiral twist. A progressive phyletic arrangement is suggested for the related genera Pan- 

 danus, Sparganium, and Typha. — /. R. Schramm. 



