APRIL 1 TO MAY 31, 1920. 



to extracting the oil, two varieties of machines are used. One is designated a 

 *knuckle ' machine, in which the nuts drop from a hopper between heavy knuckles, 



.thus cracking the shell. The other is called an 'impact' machine. It operates by a 

 centrifugal motion which propels the nut against the side of a large metal bowl with 

 sufl5cient force to break the shell. The oil can then be extracted from this copra, 



^ crushed product, 



"The oil is high grade, said to be superior to coconut oil, and finds a ready sale for 

 cooking purposes, being claimed to be adapted for any use to which a good cooking oil 

 may be put. 



"The Aguan River valley contains a single field of these nut-bearing trees extending 

 60 to 70 miles up the river from its mouth and with an average width of 10 to 12 miles." 

 'XWillard.) 



50528. Ananas sativus Schult. f. Bromeliaceae. Pineapple. 

 From San Jacinto, D. F., Mexico. Shoots presented by Sr. Jos^ Duvallon, 

 Director de Agricultura. Received June 19, 1920. 

 "A spineless pineapple, called Cayena, from Coatepec zone." (Duvallon.) 



I 50529. Cyclamen rohlfsianum Aschers. Primulaceae. Cyclamen. 



I From Libia, Tripoli. Tubers presented by Dr. E. O. Fenzi. Received June 19, 

 1920. 



"I hope that some of your cyclamen specialists may succeed in evolving a new 

 type combining the characters of Cyclamen and of Dodecatheon." (Fenzi.) 



A plant native to the grottos of Gureina, Libia, where the yellow ellipsoid tubers 

 grow in the fissures. The stem, 5 centimeters long, bears circular leaves, variegated 

 with silvery splotches and variously incised, on petioles 3 to 18 centimeters long. 

 The fragrant pale-puiple flowers appear in autumn; the exserted anthers bring it 

 I near the neighboring genus, Dodecatheon. (Adapted from Bulletin de VHerbier 

 Boissier, vol. 5, p. 528.) 



50530. Zelkova sinica C. Schneid. Ulmacese. 



From Jamaica Plain, Mass. Seeds presented by Prof. C. S. Sargent, director,* 

 Arnold Arboretum. Received June 19, 1920. 

 A rare Chinese tree about 17 meters (60 feet) high, with smooth pale-gray bark 

 which exfoliates in small thin roundish flakes, leaving many brown scars. The small 

 leaves are crenately serrate. (Adapted from Sargent, Plantae WiUonianae^ vol. 3, 

 p. 286.) 



50531 to 50539. 



From Keijo, Chosen (Korea). Seed presented by Miss Katheiiiie Wambold. 

 Received June 21, 1920. 



50531. HoLCUS SORGHUM L. Poaccse. Sorghum. 



(Sorghum vulgare Pers.) 

 "5oo soo; may be used for bread or porridge." 

 For previous introduction, see S. P. 1. No. 42060. 



50532. Perilla frutescbns (L.) Britton. Menthacese. Perilla. 

 " Tai kai, or tUl gdi, utilized for oiling the excellent oil paper used on mud 



floors in Chosen." 

 For previous introduction, see S. P. I. No. 42062. 



50533. Phaseolus angularis (Willd.) W. F. Wight. Fabacese. 



Adsuki bean. 



"Pat, peas." 



For previous introduction, see S. V. I. No. 42063. 

 2211—23 6 



