1924] Reports on Flora of Boston District,—XLVI 107 
known only at the type-station where it has thrice been collected) 
has the involucral bracts glandular as well as pilose, its disk-corollas 
slender and longer than in others of the group and with the villous 
tube more than twice as long as in A. Griscom?, its achenes nearly 
twice as long and its pappus creamy- or sordid-white instead of snow- 
white. A. arnoglossa, described from the Black Hills, is densely 
glandular-puberulent above and the very young achenes (the only 
ones seen) are definitely longer than the mature ones of A. Griscomt. 
EXPLANATION OF PLATE 143. 
Fic. 1, Arnica alpina X 1; la, disk-flowered X 4; 1b, tip of ligule x 4. 
Fic. 2, A. pulchella X 1; 2b, tip of ligule X 4. Fia. 3, head of A. Sornborgeri 
X 1. Fia. 4, A. plantaginea X 1. Fia. 5, A. chionopappa X 1; 5a, disk- 
flower X 4. Fia. 6a, disk-flower of A. gaspensis X 4. Fia. 7, A. Griscomi X 
4; 7a, disk-flower X 4. 
(To be continued) 
REPORTS ON THE FLORA OF THE BOSTON 
DISTRICT,—XLVI. 
COMPOSITAE. 
FLAVERIA. 
F. girpENTIS (L.) Ktze. On woolwaste, Westford (Miss E. F. 
Fleteher, Oct. 6, 1913). Specimen in herb. Gray. Adventive from 
South America. 
GALINSOGA. 
G. ciLIATA (Raf.) Blake. (G. parviflora Cav., var. hispida DC.; 
G. aristulata Bicknell. See Ruopora xxiv. 34, 1922; Bull. Torr. Bot. 
Club xliii. 270-271, 1916). A weed in rich soil; common, especially 
in the cities. 
G. BICOLORATA St. John & White. HRnopnona xxii. 97-101, 1920. 
Shore of Charles River, Cambridge (F. S. Collins, Sept. 26, 1916). 
Specimen in herb. N. E. Botanical Club. 
G. CARACASANA (DC) Sch. Bip. Weed in Botanic Garden, Cam- 
bridge (M. L. Fernald, Sept. 14, 1909). 
G. PARVIFLORA Cav. <A weed in rich soil; frequent in and near 
Boston. 
