NOVEMBER 1 TO DECEMBER 31, 1919. 19 



but specimens are often found which are nearly stoneless, and it is possible 

 that this character could be fixed by selection. 



For fifteen years or more the writer has used C. azarolus as a stock for pears 

 with excellent results. Top-grafted at 2 to 3 feet above the ground, it develops 

 into a very beautiful, productive, and long-lived dwarf tree, provided the graft- 

 ing is done with a very early variety. This shrub grows in extremely hot, 

 dry places and must therefore complete the greater part of its development 

 early in the season. Its roots, therefore, are unable to furnish the sap neces- 

 sary to develop pears in August. If, however, it is grafted with a pear which 

 fruits in May or June, when the roots of the Crataegus are in their period of 

 greatest activity, the best results are obtained. 



The writer speaks only of pears, because he has experimented with them, 

 but he sees no reason a priori why these stocks should not do as well for apples, 

 which he has not as yet tried. (Adapted from Aaronsohn, Bureau of Plant In- 

 dustry Bulletin No. 180, p. 15.) 



48516. "A red-fruited form." (Giraud.) 



48517. "A yellow-fruited form." (Giraud.) 



For previous introduction, see S. P. I. No. 38205. 



48518 to 48550. 



From Kenkelbosch, Cai^e Province. Collected by Dr. H. L. Shantz, Agricul- 

 tural Explorer of the Bureau of Plant Industry. Received November 1, 

 1919. Quoted notes by Dr. Shautz. 



48518. Acacia horkida (L.) Willd. Mimosacese. Wliite thorn. 

 "(No. 75. Kenkelbosch, Cape Province. September 8, 1919.) A South 



African shrub, 4 to 10 feet high ; it is very white when leafless because 

 of the large spines. It grows mostly in the open, and seeds abundantly." 



A natural hedge of this species is shown in Plate III. 



48519. Arctotis acaulis L. Asteracese. 



"(No. 25. Kirstenbosch, Cape Province. August 25, 1919.) A beautiful 

 composite, from 6 to 12 inches high, ranging from deep red to orange." 



48520. Asparagus sp. Convallariacese. 



"(No. 79. Kenkelbosch, Cape Province. September 10, 1919.) A large 

 spiny type from South Africa, with very pretty foliage ; one of the Wacht- 

 een-beetje [wait-a-bit thorns] ; a very decorative vine with a red berry 

 and black seed." 



48521. Leucospermum. Proteacete. 



"(No. 76. Kenkelbosch, Cape Province. September 3, 1919.) A beauti- 

 ful low bush from South Africa, with a very showy flower." 



48522. Medicago hispida denticulata (Willd.) Urban. Fabacese. 



Bur clover. 



"(No. 70. Port Elizabeth, Cape Province. September 2, 1919.) A low- 

 growing clover, with heads of purple flowers. It is found on most lawns, 

 producing a very dense cover. It is said to die out during hot weather 

 but is excellent when the season is not too dry." 

 48523 to 48545. Phaseolus spp. Fabacese. Bean. 



"(Nos. 44 to 69. Rosebank, Cape Town. August 27, 1919.) Beans from 

 the Entomological Stat'on at Rosebank, which have been grown for 

 weevil resistance. All strains being grown for experimental purposes 

 have been separated from the commercial varieties." 



