﻿APRIL 1 TO JUNE 30, 1915. 15 



much-needed critical experimental work upon the white-pine blister rust. This 

 disease attacks the 5-needled pines in one stage, and has as alternating hosts the 

 various species of Ribes. The exact limitation of the disease upon the species of 

 either of these genera is at present unknown. So far as tested all Ribes have taken 

 the disease. The securing of results with the pines is much slower, but there is 

 good reason to believe that all 5-needled pines will serve as hosts for the disease. 

 Many foreign Ribes and pines are not available in this country from seeds, cut- 

 tings, or plants ; hence the necessity of importing small numbers of them. This 

 disease is so well established in one section of this country at present and 

 threatens such tremendous timber values, both in the East and the West, that 

 it is important that any resistant species of either pine or Ribes be known as 

 soon as possible, with a view to the extensive use of this species in future in place 

 of the more susceptible ones. For this reason an effort is being made to secure 

 specimens of all foreign species of Ribes and 5-needled pines." (Dr. Perley 

 Spaulding. ) 



Numbers quoted are those of the Maurice Vilmorin Fruticetum. 

 40406 to 40409. Ribes spp. 



40406. "7378." 40408. "7488." 



40407. "7402." 40409. "7530." 



40410. Ribes maximowiczii Batalin. 



"7555 V." 



"(Wilson No. 958a.) From thickets, Washan, western Szechwan, alti- 

 tude 1,800 to 2,500 meters. August, 1908." (Wilson.) 



40411 to 40413. Ribes spp. 



40411. "7555F." 40413. "7477." 



40412. " 7555." 



40414. Ribes affine H. B. K. 



" 7472." 



" Shrub 2 to 3 meters in height, young shoots glabrous or subpubescent, 

 the year-old shoots shining, clear red-brown. Leaves rather small or 

 medium, rounded, 6 cm. long and broad, 3 to 5 lobed, with lobes sometimes 

 obtuse and little developed, base truncate or cordate, glabrous or sub- 

 pubescent, even glandular above, subpubescent or pubescent below. 

 Racemes very variable, short and rather crowded, medium or rather long 

 up to 12 cm., in this case loose with about 15 flowers. Sometimes the 

 racemes are branched and 20 cm. long (R. multiflorum Kunth). Flowers 

 medium, subcampanulate, white or a little washed with rose, pubescent, 

 not glandular, odorous. Fruit as large as a currant, round, black, shiny, 

 covered with a withered flower, with regularly reflexed sepals. Pulp 

 colorless, not juicy, containing 15 rather small ovoid or angular seeds. 

 Native of Mexico in the high mountains in the Federal District and else- 

 where. It bears in Mexico the name of Ciruelillo." (E. Janczeivski, 

 Monographic des Groseilliers, p. 330.) 



40415. Ribes alpestke commune Janczewski. 

 "7555 M-A." 



"(Wilson No. 277 A.) From thickets, Fanghsien, western Hupeh, at 

 altitudes of 2,100 to 2,250 meters. September, 1907." (Wilson.) 

 14682°— 18 2 



