66 BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 
* Coronopus pipyMus (L.) J. E. Smith. 
In the collection of the Nantucket Maria Mitchell Association 
I found an unmounted fruiting specimen of this wart cress among 
a series of plants which, Mrs. Albertson informed me, had been 
collected in or near the town in August, 1908. 
* THLASPI ARVENSE L. 
Wauwinet, June 11, 1909, a small colony of scattered plants 
in a waste spot back of the beach, growing with Brassica arvensts, 
Brassica campestris, and Conringia orientalis. The plants were 
mostly just beginning to flower, but a few bore good-sized pods. 
SISYMBRIUM LEIOCARPUM Jord. 
A very common weed of farm yards, old fields, and waste 
ground. First flowers May 30, 1909. 
Nothing was seen of typical Szsymbrium officinale (L.) Scop., 
which, although apparently rare in the eastern states, I have col- 
lected near New York City and on Long Island. 
* SISYMBRIUM ALTISSIMUM L. 
A recently introduced weed which threatens to become trouble- 
some, First observed June 12, 1908, two plants just in flower in 
a field west of the town and a single plant in waste ground on the 
road to Surfside. The following year it was found in considerable 
abundance at Shimmo Valley farm and also in a cultivated field 
on the Miacomet Pond farm, just in flower June 2. 
CAKILE EDENTULA (Bigelow) Hooker. 
Common on sea-beaches. First leaves May 30, 1909; con- 
tinuing to bear flowers into September. 
BRASSICA CAMPESTRIS L. 
Occasional in old fields and waste places. Back of the shore 
on the ocean front at Wauwinet it was freshly in flower June 9, 
1909 ; the same day in a waste spot near the town it showed well- 
developed fruit. Plant pale green and glaucous, fleshy, glabrous, 
or the lowest leaves bearing obscure scattered hairs ; flowers bright, 
light yellow, the petals about 1 cm. long. 
* Brassica Rapa L, 
Frequent in cultivated fields. Scattered plants in a wheat field 
near the town were freshly in flower June 13, 1900. 
