112 THE AA4ERICAN BOTANIST 



that in the red form the segments of the perianth were shorter, 

 broader, and less recurved than in the typical form. We also 

 noted various intermediate forms. There seems to be no 

 definite line where one form stops and the other begins. At 

 the most the extreme red form, accompanied as it is with the 

 differences in the perianth, might be reckoned a variety but not 

 a separate species on account of the intermediate forms." Mr. 

 C. L. Gruber, Kutztown, Pa., says "Lilium Philadctphicum is 

 not common in this locality and all the flowers I have seen of it 

 were of the usual red-orange color, but Lilium Canadensc is 

 common, and while the majority of the flowers are yellow, I 

 have found them in colors ranging from clear yellow to rich 

 red. During this summer I have found a number of meadow 

 lily plants with flowers of the intermediate colors, red predomi- 

 nating in some, yellow in others." 



Unusual Root-crops. — "In the alpine or Andine belt 

 of Peru, where the potato is the chief crop, three other root- 

 crops are generally grown by the same methods and often 

 in the same rows with the potatoes. These Andine root-crops 

 are the oca {Oxalis tubcrosa), the anu (Tropoeoluiu tubero- 

 sum) j and the ullucu ( Ullucus tuberosus) . The tubers of all 

 three plants are remarkably alike and similar to some of the 

 varieties of potatoes, although the plants have no relation to 

 potatoes or to each other. The oca is a relative of our sheep- 

 sorrel, the anu of the common nasturtium and the ullucu of 

 the Madeira vine. Though not attaining the size of large 

 potatoes, the other tubers have a more attractive appearance 

 and seem to have even better keeping qualities. In the lower 

 part of the potato belt there is another root-crop, the yacon or 

 Uacon (Polymnia sonchifolia), comparable to the so-called 

 "Jerusalem" artichoke which is supposed to be a native of 

 Mexico. It produces large compact clusters of thick, fleshy 

 roots tapering at both ends and with a strong external re- 

 semblance to sweet potatoes. The flesh is crisp, juicy, and has 



