1912] Deane,— Pink-flowered Lupinus perennis 237 
Tetraedron minimum, Hansgirg. Plankton, Lake Opinacon. 
Tetraedron regulare, Kuetzing. Plankton, Lake Opinacon. 
Scenedesmus bijuga, Wittrock. Plankton, Lake Opinacon. 
Scenedesmus quadricauda, Brébisson. In plankton, Lake Opinacon. 
Coelastrum microporum, Naegeli. Among plankton, Lake Opinacon. 
Hydrodictyon reticulatum, Lagerheim. Common in a pool below 
the falls at Kingston Mills, July 15th. 
Pediastrum boryanum, Meneghini. Common in plankton, Lake 
Opinacon. 
*Pediastrum duplex, Meyer. Plankton, Lake Opinacon. 
Pediastrum tetras, Ralfs. Plankton, Lake Opinacon. 
Gloiococcus mucosus, A. Braun. Scarce in plankton, Lake Opinacon. 
*Coleochaete soluta, Pringsheim. Common on Potamogeton ampli- 
folius in Lake Opinacon. 
*Coleochaete orbicularis, Pringsheim. On drifting water-plants at 
Jones Falls. Common on Potamogeton amplifolius in Lake Opinacon. 
Cladophora fracta, Kuetzing. Floating in great masses at the mouth 
of the Cataraqui River. 
BOTANICAL DEPARTMENT, QUEEN’S UNIVERSITY, 
Kingston, Ontario. 
THE PINK-FLOWERED FORM or LUPINUS PERENNIS.— It has been 
known for a long time that our common Lupine, Lupinus perennis L., 
occasionally varies from the typical blue or purplish-blue to pink or 
white, and our manuals contain frequent references to this fact. In 
the Bulletin of the Torrey Botanical Club for 1890, volume XVII, 
page 124, Dr. N. L. Britton made the following note, “ Lupinus 
perennis L., forma rosea. Flowers beautifully pink. May’s Landing, 
Atlantic Co., [New Jersey] Dr. J. E. Peters." As long ago as 1814, 
Pursh in his Flora Americae Septentrionalis, vol. II, page 467, says, 
* Flowers blue, purple, and sometimes white." Emma J. Cole in the 
Grand Rapids Flora [Michigan], 1901, page 96, says, “Flowers are 
blue, white, purple or pink; forms with pink flowers are found along 
Hogadone Creek (W. M. Clark)." In the Michigan Flora by W. J. 
Beale and €. F. Wheeler, 1892, page 83, we read, “ Flowers, a fine 
blue-purple, varying to light pink." And to cite one more reference, 
in Plants of Monroe County, New York, and adjacent Territory by 
