1924] Reports on the Flora of the Boston District 167 
T. vuLGARE (Lam.) Schrank. (Includes T. officinale Weber and 
var. palustre (Sm.) Blytt of Gray’s Manual, 7th Ed.) Fields, lawns 
and roadsides, very common throughout. 
T. LAEVIGATUM (Willd.) DC. (T. erythrospermum Andrz. of Gray’s 
Manual, 7th Ed.) Ledges and dry soil, frequent. 
TRAGOPOGON. 
T. PORRIFOLIUS L. Casual at Wellesley Hills (F. W. Hunnewell). 
T. PRATENSIS L. Fields and waste places, rare. 
TUSSILAGO. 
T. Farrara L. Wet places, usually in clayey soil, rare (11 stations 
from Amesbury to Scituate). 
VERBESINA. 
V. ENCELIOIDES (Cav.) B. & H., var. EXAURICULATA Robinson & 
Greenman. From wool washings, Parker River Mills, Georgetown 
(Mrs. C. N. S Horner, no date). Specimen in herb. N. E. Botanical 
Club. 
VERNONIA. 
V. FASCICULATA Michx. Medford (L. L. Dame, August, 1886; 
Mrs. P. D. Richards, Oct. 10, 1887). Specimens in herb. Gray and 
N. E. Botanical Club. 
V. noveboracensis Willd. Swamps and wet places; frequent from 
Medford, Weston, Newton and Concord south. 
XANTHIUM. 
See Millspaugh & Sherff, Field Mus. Publ. Bot. iv. 9-49, pl. 7-13, 
1919. 
X. AMBROSIOIDES Hook. & Arn. S. Boston (C. E. Perkins, July, 
1878). Specimen in herb. N. E. Botanical Club. Native of South 
America. 
X. chinense Mill. (X. canadense of Gray's Manual, 7th Ed., not 
Mill.) Sandy and gravelly shores; Lawrence, Boston, Wayland. 
X. echinatum Murr. Sandy shores and waste places from New- 
buryport to Duxbury, mostly near salt water. 
X. italicum Moretti. (X. commune Britton.) Sandy shores and 
waste places. occasional. 
X. PENNSYLVANICUM Wallr. Waste places; Lawrence (A. S. Pease, 
