38 SEEDS AND PLANTS IMPORTED. 



native to a comparatively small area in southwestern Texas and northern 

 Mexico. 



Unlike most other rubber-producin!:,' plants, the bark of the gnayule contains 

 no latex, the rubber being in the cellular tissue of the epidermis and to a 

 certain extent in the branches and leaves. The dried plants are ground, and 

 the rubber is extracted by one of several chemical processes. Although guayule 

 rubber is not of the highest grade, it has a possible future, because the plant 

 will grow in semiarid regions, it does not suffer from light frosts after pass- 

 ing the seedling stage, and the plants may be gathered throughout the year. 

 (Adapted from Commerce Reports No. 1^9, June 26, 1918.) 



For previous introduction, see S. P. I. No. 47955. 



51701. Phaseolus vut.garis L. Fabacese. Common bean. 



From Santa Ines, Chile. Seeds presented by A. Fernandez, through 

 Salvador Izquierdo. Received November 22, 1920. 



Chilean bean. 



For previous introduction, see S. P. I. No. 5119S. 



51703. Pyrus malifolia Spach. Malacese. Pear. 



From Paris, France. Cuttings presented by Prof. D. Bois, Museum d'His- 

 toire Naturelle. Received November 23, 1920. 

 A handsome tree which is a hybrid of doubtful origin, possibly a seedling 

 from P. auricMlaris; the original specimen, 30 feet high, grew in Paris. The 

 leaves are roundish oval, nearly always cordate at the base, and the flowers 

 are 1 to 11 inches across. The fruit is broadly turbinate, about 2 inches long, 

 and deep yellow when ripe. 



For previous introduction, see S. P. I. No. 44048. 



51703. AsiMiNA TRILOBA (L.) Duiial. Annonaceae. Papaw. 



From McConnelsville, Ohio. Budwood presented by H. D. Tennent. Re- 

 ceived November 26, 1920. 



" The largest late sort of which I know and the mildest in flavor when in 

 best condition." (Tennent.) 



"Fruit large and of excellent quality." (David Fairchild.) 



51704. Chayota edulis Jacq. Cucurbitaceae. Chayote. 

 (Sechium ed^lle Swartz.) 



From Antigua, Guatemala. Fruits presented by W. Cameron Townsend, 

 through Herndon W. Goforth, American vice consul, city of Guatemala. 

 Received November 29, 1920. 

 "Guisquil de papa. The very best variety which has yet come under the 

 range of my observations is the guisquil de papa (potato chayote) of Antigua. 

 This is a broadly obovoid fruit about 4 inches in length, plump, perfectly 

 smooth on the surface (though with brownish cracks when fully ripe), and of 

 a dull ivory-white color. This variety is unusually mealy and is of much better 

 flavor than most others. It is, to my mind, the one which should be dis- 

 seminated most widely in the United States." (Wilson Popenoe.) 



51705. Amygdalus communis X persica. Amygdalacege. 



Peach-alm-ond hybrid. 



From Morgan Hill, Calif. Seeds presented by Leonard Coates. Received 

 December G, 1920. 



"A peach-almond hybrid which, Mr. Coates says, bears fruits looking in 

 their early stages like green peaches but in early September the flesh begins 

 to split open and expose the almondlike pit. He has tried this as a stock and 

 finds that it produces the branching roots of a peach but is more vigorous than 

 any other stock. He guarantees tliat these seeds will make double the growth 

 of the ordinary peach seeds in the nursery row. This hybrid was procured 

 by Mr. Coates from a man living near Los Gatos." (David Fairchild.) 



