true desertornm of Arizona and the typical elegantula from near 

 Mancos, Colorado. It seems more probable, however, thaj: 

 all three represent phases of a single species. Mr. D. M. Andrews 

 has recently collected elegantula in Colorado, and thinks that it 

 is separable from my plant on account of the habit of growth. 

 We do not yet know how far this may be due to differences in 

 environment. 



The Fo plants irom desertornm X chrysantha, raised by my wife, 

 flowered this year. The most curious form shows doubling, 

 with twisting of the spurs. The spurs vary from 6 to 9, but the 

 laminae of the petals are supplemented internally by a variable 

 number of emarginate laminiform appendages. 



This year we have an authentic^, caerulea X desertorum in 

 flower. The flowers are formed as in caerulea, with pure white 

 laminae; but are smaller, the sepals pale lilac tipped with white, 

 the spurs rosy-lilac. In bud the spurs are suffused with red. 

 The leaflets are pubescent beneath, the hair short but abundant. 

 Spurs 28 mm. long, laminae 11 mm; sepals about 20 mm. long 

 and a little over 8 mm. wide. In full flower the spurs are moder- 

 ately divergent. The leaflets are large, even on the flowering 

 stems. 



We also have this year a varied series of F2 plants from A. 

 caerulea X chrysantha. A. chrysantha has yellow flowers, often 

 with some anthocyan tints, which then are red, but never suffi- 

 ciently to affect the general yellow effect. The sepals are pre- 

 vailingly narrower than in caerulea, but variable. The Fi from 

 caerulea X chrysantha is pale blue with the laminae yellow, fading 

 to nearly white. The F2 plants include such as the following: 



(a) Form of caeridea, w'ith broad sepals, but laminae entirely 

 bright lemon yellow; sepals dilute rosy purplish, more or less 

 suffused with yellow, especially at tips; spurs pale yellow, apically 

 suft'used with dilute purplish; buds strongly pinkish, including 

 spurs. Thus the buds show the acid state of the anthocyanin, 

 which is retained to maturity in chrysantha, but the hybrid is 

 affected by the caeridea ancestry. This type of Fo hybrid occurs 

 only in a small percentage of the plants. 



(6) Sepals broad as in caeridea; flowers white, very delicately 

 tinted with purple on sepals and often on spurs. 



