64 
Onopordum (Vaill.) L. Cotton or Scotch Thistle. 
ACANTHIUM L. Amherst, H. L. Clark in Rhodora, Vol. I, p. 164. 
Centaurea L. Star Thistle. 
Cyanus L. Bachelor’s Button. 
NIGRA L. Knapweed. Spanish Buttons. Waste places, Hard- 
wick, E. Hitchcock ; Amherst, etc. 
Cichorium [Tourn.] L. Succory or Chicory. 
INtTyBus L. Common Chicory. Blue Sailors. Formerly rare 
(1875), now quite common. 
Krigia Schreb. Dwarf Dandelion. 
‘virginica (L.) Willd. 
amplexicaulis Nutt. Cynthia. 
Leontodon L. Hawkbit. 
AUTUMNALIS L. Fall Dandelion. ‘ Arnica.” One station noted 
in 1875 ; now rather common in some localities. 
Picris L. 
hieracoides L. Springfield, waste places, Mrs. M. L. Owen. 
echiotdes L. Ox-tongue. Forest Park, Springfield, several plants | 
noted in 1894, Mrs. M. L. Owen. 
Tragopogon [Tourn.] L. Goat’s Beard. 
porrifolius L. Salsify. Oyster-plant. Huntington, escaped from 
cultivation. 
pratensis L. Huntington, Northampton, escaped from cultiva- 
tion. 
Taraxacum [Haller] Ludwig. Dandelion. 
OFFICINALE Weber. Troublesome on lawns. For many years 
what is known as the French dandelion has been 
cultivated on the Mass. Agr. College grounds, and 
has escaped very freely into nearby fields. It pre- 
sents very different characteristics from the type 
even when escaped, and is susceptible to a mildew 
(Podosphaera), differing in this respect from the 
type. 
officinale Weber. var. palustre (Sm.) Blytt. Springfield, L. An- 
drews. 
ERYTHROSPERMUM Andrz. Red-seeded Dandelion. Mass. Agr. 
College grounds. 
Sonchus [Tourn.] L. Sow Thistle. 
ARVENSIS L. Field Sow Thistle. 
OLERACEUS L. Common Sow Thistle. 
ASPER (L.) Hill. Spring-leaved Sow Thistle. 
Lactuca [Tourn.] L. Lettuce. 
SCARIOLA L. Prickly Lettuce. Springfield, L. Andrews. 
SCARIOLA L. var. INTEGRATA Gren. & Godr. Springfield, L. 
Andrews. 
