78 FLORA OF MOUNT DESERT. 



FUMARIA, L. Fumitory. 



F. OFFICINALIS, L. 



Waste ground, Great Cranberry Isle (R. & R.). Adventive 

 from Europe. 



CRUCIFER^. Mustard Family. 



CARDAMINE, L. Bitter Cress. 

 C. hirsuta, L. 



Frequent in brooks and on pond shores. So far as known the 

 Island plants are all glabrous, and in other respects do not cor- 

 respond to the typical European plant. Whether our common 

 American plant is not specifically distinct seems to be an open 

 question. That it is so distinct, see N. L. Britton, Bull. Torr. 

 Bot. Club, xix. 219. As, however, there appear to be inter- 

 mediate forms, perhaps it would be wiser to give it only varietal 

 rank. The Mt. Desert forms can perhaps be classified under 

 the three following heads for convenience, although ajjparently 

 there are no well defined dividing lines between them. 



(a) Forma Pennsylvanica. C. Pennsylvanica, Muhl. Gla- 

 brous; large and leafy; few, if any, radical leaves; pods linear; 

 pedicels somewhat divergent. Roadside ditch between Town 

 Hill and Northwest Cove; near outlet of Great Pond; In- 

 tervale Brook (Rand). 



(/3) Like the last, but with widely divergent pedicels, and 

 thicker, much shorter pods. The most common form. Brook, 

 Clark Valley ; Cold Brook ; Intervale Brook (Rand) ; — 

 Doctors Brook ; Stanley Brook (Redfield) ; — Deer Brook 

 (R. & R.). 



(y) A form more nearly corresponding to typical C. hirsuta. 

 Glabrous ; radical leaves rosulate ; pedicels erect or som..- 

 what spreading ; style short and stout ; pods variable in 

 length and thickness. Shores of Northwest Arm, Great 

 Pond (Rand, M. L. Fernald). 



C. parviflora, L. 



Leaflets mostly linear; radical leaves few or none; pods 

 linear, erect on spreading pedicels. In dry ground, or among 

 moist rocks; rare. Little Duck Island; Flying Mt. (Rand). 



