1904] Clark, — Triosteum perfoliatum in Massachusetts 179 



Fisch. ex DC. 1. c, as syn. P. uliginosa, Torr, & Gray in Torr. Fl. 

 N. Y. i. (1843) 453, t. 69. F. rotundifolia, var. uliginosa. Gray, Man. 

 Ed. 2 (1856) 259. — P. rotundi/olia, with which P. asarifolia a.Yi6. P. 

 incarnata (P. u/igi/wsa) have been very generally united, has white 

 flowers 1.5 to 2 cm. broad, and in America occurs in open dry or 

 sandy woods from Prince Ed\vard Island and Nova Scotia to South 

 Dakota and Georgia. P. asarifolia and P. incarnata, on the other 

 hand, have pink or crimson flowers i to 1.5 cm. broad, and occur in 

 cold, wet or mossy woods or in sphagnum from the Gulf of St. Law- 

 rence to Hudson Bay and Alaska, south to northern New England 

 and New York, the Great Lakes and the Rocky Mountains ; also in 

 northeastern Asia. Although in dried specimens somewhat resem- 

 bling P. rotundi/olia, the plants in the field occupy an area so essen- 

 tially different and so constantly have pink or purplish smaller 

 flowers that they must be regarded as specifically distinct from the 

 larger white flowered plant of dry woods of the Atlantic slope. In 

 their extreme forms P. asarifolia and P. incarnata are separated only 

 by leaf-outline, the former having oblate or round-reniform cordate 

 leaves, the latter obovate or suborbicular leaves rounded to the base. 

 A large series of herbarium specimens and many observations of the 

 plants in northeastern stations show no appreciable difference in the 

 flowers; and too often colonies with leaves connecting the two 

 extremes abound in swamps of northern Maine and Quebec. On 

 this account the plants seem to the writer best treated as phases of 

 one widely distributed species of the northern mossy woods. — M. L. 

 Fernald, Gray Herbarium. 



Triosteum perfoliatum in Massachusetts. — At a recent exhi- 

 bition of native plants at Horticultural Hall, Boston, much interest 

 was taken in specimens of Triosteum perfoliatum^ L., from East Wey- 

 mouth, Mass. This species has not before been reported from 

 Massachusetts, the only station heretofore known for it in New Eng- 

 land being in Connecticut. For a long time Triosteum aurantiacum, 

 Bicknell, has been wrongly called T. perfoliatum, but both species 

 were to be seen at this exhibition and the following differences were 

 most noticeable. The opposite leaves of T. perfoliatum formed a 

 wide margin where the two united around the stem of the plant, the 

 margin thus formed often measuring half an inch in width on each 

 side of the stem, in this respect much resembling Eupatorium perfoli- 



