70 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
B. ALBA L. (B. PUBESCENS Elirh.) Two thousand trees were 
planted in 1901 in Gourdeau Park and a few are still growing there, 
but are not over two feet in height. //. .S7. John, no. 1,199 (H). 
POLYGONACEAE. 
Rumex Britannica L. Oecurring only along the swampy mar- 
gins of the fresh-water ponds extending beyond the eastern end of 
Wallaee Lake, near Life Saving Station No. 3. J . Macoun (C. no. 
22,595); //. St. John, no. 1,200 (H). 
Fl. — August. Fr. — September. 
[R. occiDENTALis Wats. The plant so listed by J. Macoun is 
R. Britannica.] 
R. CRISPUS L. Introduced and common near the Life Saving 
Stations, rare elsewhere. J. Macoxin; 11. St. John, nos. 1,201, 1,202, 
and 1,203 (H). 
Fr. — August and September. 
R. maritimus L., var. fueginus (Phil.) Dusen. See St. John 
Rhodora, xvii. 81 (1915). Abundant en the brackish beaches of 
Wallace Lake, and appearing as a weed in the gardens through the 
use as a fertilizer of sea-weed collected on the beach of the lake. 
J. Macoun (C. no. 22,549); //. St. John, nos. 1,204, 1,205,1,206,1,207, 
and 1,208 (H). 
Fl. — August. Fr. — September. 
R. AcETOSELLA L. Thoroughly established on the drier parts of 
the island, especially near the Life Saving Stations. Mentioned by 
J. Dwight, Jr. (D. pp. 13 & 42). Listed by J. Macoun; and //. T. 
Giissow; H. St. John, no. 1,209 (H). 
Fl. — August. 
Polygonum Rail Bab. Wet dune hollow, possibly brackish. 
Known only from the collection, //. St. John, no. 1,210 (H). 
Fl. — August. 
[P. FowLERi Robinson. The plant so listed by J. Macoun is P. 
avicidctre.] 
P. AVICULARE L. Well established near the Life Saving Stations. 
J. Macoun (C. no. 22,599, also as door-weed M. p. 218A); H. St. 
John, nos. 1,211, and 1,212 (H). 
FL, Fr. — August and September. 
