250 MORPHOLOGY AND TAXONOMY, BRYOPHYTES [Bot. Absts., Vol. V, 



idia are borne. A peculiar arrangement of the sex organs was found on the prothallia of 

 Pteris ensiformis Burn. var. Victoria. On the prominent and highly developed cushion the 

 archegonia occupy only the highest portions while the antheridia are found on the lower parts 

 from the notch to the posterior end. In some cultures a large number of prothallia produced 

 antheridia only, on both surfaces, especially when the prothallia were equally illuminated 

 on both surfaces. In other cultures when the dishes were about half filled with sphagnum 

 and nutrient solution, several species were grown which produced both archegonia and an- 

 theridia on both surfaces. It was observed that prothallia may be grown in weak light indef- 

 initely, but under such conditions antheridia only are produced. When the light is sufficiently 

 strong, archegonia will form with the continued growth of the prothallium, provided fertili- 

 zation is prevented. — S. H. Essary. 



1909. Vielhauer, [ — ] Vierblatteriger Klee. [Four-leaved clover.] Illustrierte Landw. 

 Zeitg. 39: 373-374. 1919. — The formation of four or more leaflets is encouraged by 

 conditions favoring luxuriant growth. It is to be regarded as a condition of robustness or 

 hypertrophy, or as a certain form of fasciation; and it diminishes the fruitfulness of the plant. 

 Whether the property of forming four leaflets is hereditary or not is not known. — John W. 

 Roberts. 



1910. Vochting, Hermann. Untersuchungen zur experimentellen Anatomie und Path- 

 ologic des Pfianzenkorpers. II. Die Polaritat der Gewachse. [Experimental anatomy and 

 pathology of the plant body. II. Polarity.] i;i+333 p., 12 pi., 113 fig. Tubingen, 1918.— Re- 

 view by O. von K[irchner] in: Zeitschr. Pflanzenkr. 29: 242-249. 1919 (1920). 



1911. von K[irchner], O.. [Rev. of: Vochting, Hermann. Untersuchungen zur ex- 

 perimentellen Anatomie und Pathologie des Pfianzenkorpers. II. Die Polaritat der Gewachse. 

 (Experimental anatomy and pathology of the plant body. II. Polarity.) vi-\-333 p., 12 pi., 113 

 fig. Tubingen, 1918.] Zeitschr. Pflanzenkr. 29: 242-249. 1919 (1920).— See also next 

 preceding Entry, 1910. 



1912. Weatherwax, Paul. The ancestry of maize — a reply to ciiticism. Bull. Torrey 

 Bot. Club. 46: 275-278. 1919. — H. J. Kempton's criticism of author's paper of September, 

 1918, on the evolution of maize make necessary a brief presentation of the present status of 

 the question. Errors were made in the paper in question in confusing "bracts" with "pro- 

 phylla" and in substituting "one-rowed" for "single-rowed"; these are to be corrected. The 

 theories of the origin of maize by hybridization and of the ear by fasciation are discussed, 

 and the importance of the use of comparative morphology in explaining the origin of Zea, 

 Euchlaena and Tripsacum from common ancestry is re-emphasized. — P. A. Mum. 



1913. Wieland, G. R. Distribution and relationships of the cycadeoids. Amer. Jour. 

 Bot. 7: 154-171. PI. 7, 3 fig. 1920— See Bot. Absts. 5, Enry 1999. 



1914. Willey, Florence. The vegetative organs of some perennial glasses. Proc. Iowa 

 Acad. Sci. 25: 341-367. Fig. 121-1U- 1920. 



MORPHOLOGY AND TAXONOMY OF BRYOPHYTES 



Alexander W. Evans, Editor 



1915. Allen, C. E. Sex inheritance in Sphaerocarpos. Proc. Amer. Philos. Soc. 58: 

 289-316. 27 fig. 1919.— See Bot. Absts. 4, Entry 486. 



1916. Andrews, A. Le Roy. Dicranoweisia crispula in the White Mountains. Rhodora 

 21 : 207-208. 1919.— See Bot. Absts. 4, Entry 313. 



1917. Andrews, A. LeRoy. Hymenostomum in North America. I. Delimitation of the 

 genus. Bryologist 23 : 28-31. 1920. — The author maintains that the mosses usually classified 



