No. 1, July, 1920J MORPHOLOGY, ETC., VASC. PLANTS 1 49 



to growing at the wrong season. Seed stored in air-tight jars in the bottom of which cal- 

 cium chloride had been placed maintained their viability. Plantings of peppers, beans, "kra, 



tomatoes and lettuce made over a period of five years and during all seasons failed to indie 

 any degeneration of native seed as compared with QOrthern grown seed when properly cared 

 for. "In all vegetable plantings the season at which the planting was made had a very pro- 

 nounced effect on the yield, being the predominant factor influencing production." — John 

 A. Stevenson. 



973. SANCHEZ, A. El chayote. [The chayote.] Bol. Carnara Agric. Nfacion. Leon 

 [Mexico] 6: 335-339. 1919. — A popular account of the culture of the chayote (Sechium edule) 

 as practised in Mexico. — John A. Stevenson.. 



974. Varela, E. El frijol dolico. [The Dolichos bean.] Revista Agric. [Mexico] 4: 

 18-20. 8 fig. 1919.— Sec Bot. Absts. 4, Entry 138. 



975. Wheeler, W. A., and G. C. Edler. Some effects of war upon the seed industry of 

 the United States. U. S. Dcpt. Agric. Yearbook 1918:195-215. 1919.— The seed industry 

 was affected materially by the war. Rapid strides were made but many of the effects are 

 probably only temporary. Imports of seeds decreased greatly and exports increased as 

 shown by statistics. The rise of the small gardener produced a great domestic demand. Maps 

 were given showing the location of the principal seed producing areas in the United States. 

 Due to the demand, quantity rather than quality prevailed, novelties were minimized, stand- 

 ard varieties emphasized. The seed industry was adversely affected by transportation 

 facilities, local problems, and banking conditions. The bureau of markets established a seed 

 reporting service to stabilize conditions. The difficulties appear not insurmountable. — 

 C. J. Shirk. 



976. Youngken, Heber W. Notes on the dasheen and chayote. Amer. Jour. Bot. 6: 

 380- 386. Fig. 1-5. 1919. — Two exotic vegetables recently introduced into the United States, 

 the Trinidad dasheen (a variety of Colocasia esculenta (L.) Schott) and the chayote (Chayota 

 edulis Jacq.) are described in detail as to history, external characters of the plant histology 

 of the fruit, and economic value and uses The corms of the dasheen are employed in the same 

 way as white potatoes, the aerial shoots as asparagus and the fruits of the chayote as squash. 

 [See Bot. Absts. 3, Entry 2792.]— E. W. Sinnott. 



MORPHOLOGY, ANATOMY AND HISTOLOGY OF VASCULAR 



PLANTS 



E. W. Sinnott, Editor 



977. Anonymous. Honey. Newest theories concerning the function of the nectary in 

 flowers. Sci. Amer. Supplem. 88: 22-23. 1919. [Translation of extracts of an exhaustive 

 article by M. Gaston Bonnier in La Revue Hebdomadaire (Paris).] 



978. Anonymous. (A. H. C.) [Rev. of: Bower, F. O., J. G. Kerr, and W. E. Agar. 

 Lectures on sex and heredity delivered in Glasgow, 1917-18. 16mo. vi + 119 p.] Macmillan 

 Co.: London, 1919'. Jour. Botany 57: 287-288. 1919. 



979. Arts chwager, Ernst F. A new fixative for paraffin sections. [Rev. of : Szombatuy, 

 Koloman. Neue Methode zum Aufkleben von Paraffinschnitten. (New methods for the mount- 

 ing of paraffin sections.) Zcitschr. Wiss. Mikrosk. 34 : 334-336. 1918. ] Bot. Gaz. 67 : 373-374. 

 1919. — The reviewer has tested this method and finds it to be excellent. Material difficult to 

 retain on the slide, such as moss archegonia and sections of grass leaves, adhered to the slides 

 even when left in running water for several days. The new fixative is easily prepared, keeps 

 well, and should come into general use. — H. C. Cowles. 



