i8gi.| Flotvers and Insects. 65 



are those who term this the "red rust," but so far as I have 

 been able to learn by talking with farmers in Alabama, and 

 from the specimens received, the term here is applied to the 

 early, or arrested stages of "black rust" as I have described 



above. 



Auburn, Ala. 



Flowers and insects. VI. 



CHARLES ROBERTSON. 



Triosteum pcrfoliatum L. — In the bud the style is bent and 

 the stigma is pressed against the opposing lobes of the co- 



rolla. As soon as the lobes separate the style straightens and 

 the stigma is thrust out. The stigma rises from 3 to 4 mm. 

 above the anthers and appears to be receptive while they are 

 still indehiscent, so I regard the flower as proterogynous. The 

 corolla continues to lengthen until the second stage. In this 

 stage the anthers are dehiscent, and the stigma is turned to 

 one side. The flowers are rather dark purple and collected 

 in inconspicuous clusters in the axils of the perfoliate leaves. 

 Nectar is secreted in a gibbosity in the base of the corolla. 

 The corolla is from 14 to 16 mm. long and is adapted to 



long-tongued bees. 



Visitors: (May 18 and 23) Apidae: (1) Bombus Riding- 

 sii Cr. 9, s. ; (2) B. vagans Sm. 9, s., visited all of the open 

 flowers and forced its proboscis into several buds, whose lobes 

 had hardly begun to loosen, but which contained an abund- 

 ance of nectar; (3) B. americanorum F. 9, s. ; (4) Antho- 

 phora abrupta Say 6, s,; Andrcnidae: (6) Augochlora pura 

 Say 9, s. and c. p., crawls into the tube; (7) Halictus Lerouxii 



St. Farg. 9, c. p. 



Cephalantkus occi din talis L. — The first peculiarity of the 

 flower that strikes one is the great difference in the height of 

 the anthers and stigma. Indeed, it looks like a long-styled 

 dimorphous flower. The anthers are at the mouth of the tubu- 

 lar corolla, while the stigma rises 7 mm. higher. It looks as if 

 the pollen could never touch the same part of the insect which 

 comes in contact with the stigma. The disparity is accounted 

 for by the fact that the style itself scrv< 3 to expose pollen to 

 the visitors. In the bud the anthers dehisce, depositing all of 



