BIOLOGICAL PAPERS. 207 



Thelesperma gracile Gr. Professor Smyth has found throughout its range 

 within the state plants of this species with rayless flowers. 



Cnicus altiseimus Willd. Miss Meeker reports having seen white-flowering 

 thistles, but does not say of what species, but it is supposed it is this. 



Cichorium intybus L. The writer found a plant the past summer in a meadow 

 of tame grasses, where the plant has been established for a number of years, 

 which had pale pink flowers instead of blue. 



Asclepias tuberosa L. The writer found a plant of this beautiful species last 

 summer that bore its blossoms in small umbels in racemes, there being three 

 or four such umbels to each stem, instead of one large terminal umbel. It 

 has not been the writer's fortune to find other than the common orange-scarlet 

 flowering variety of this plant, but Professor Smyth told him he had met with 

 all shades of color, from a bright scarlet to a rich golden yellow. 



Gentiana puberula Mx. Miss Meeker reports the finding at Ottawa, by Prof. O. 

 C. Carleton, of a specimen with white flowers of this pretty, late-flowering 

 plant. 



Convolvulus sepium L. The writer has several times met with plants of this vine 

 bearing rosy-white flowers. Professor Smyth has found the same species with 

 double flowers, the fulness being formed by the corolla being several times 

 folded upon itself. 



Phlox divaricate L. Both Professor Smyth and Miss Meeker report finding 

 white flowering plants of this early spring flower. 



Phlox pilosa L. About twenty years ago the writer found a plant of this species, 

 with pure white flowers. Last summer, while crossing a meadow where there 

 were thousands of this pretty flower in bloom, a plant with white flowers with 

 pink eye was found. Another plant had rosy-white flowers, while a third had 

 blossoms of a lilac color with pink eyes. Several plants had blossoms of a 

 deeper pink than the rest, verging on a crimson. Professor Smyth also re- 

 cords a white-flowering form of this plant. 



Salvia pitcheri Torr. Both Professor Smyth and the writer have met with a 

 white- flowering form of this blue flower. 



Teucrium canadense L. Professor Smyth has found a pure white form of this 

 plant, and the writer has found three shades of purple, from a light to a quite 

 deep purple, among different clumps of this rather common weed. 



Verbena aubletia L. Professor Smyth records a white-flowered form of this 

 plant, and Miss Meeker says she had a plant with flowers of this color in her 

 flower-garden. 



Verbena stricta Vent. Both Professor Smyth and the writer have seen plants of 

 this species with white flowers. 



Verbena urticaefolia L. Professor Smyth reports finding plants of this species 

 with purple-colored instead of the white flowers usually seen in this species. 

 This is another case of the interesting variation from a lighter to a darker 

 colored flower, a form of variation much less frequently met with than the 

 more common one of the change from a darker to a lighter form. 



Ruellia ciliosa Pursh. A white form of this purple-colored flower is recorded by 

 Professor Smyth. 



Oxybaphus angustifolius Sw. Professor Smyth records plants with linear leaves, 

 and also a white-flowering form of this species. 



Polygonum erectum L. A tall-growing form (three to six feet high) with a 

 fastigiate habit of plant is recorded by Professor Smyth. 



Polygonum pennsylvanicum L. The usual color of the flowering spikes of this 

 weed is from a deep rosy to a deep red, but Professor Smyth reports a white- 

 flowered form also. 



