102 Rhodora IMay 



growth of T. occidentalis which fringes the southwestern banks of 

 the lake. It was not so thrilling a sight as a Chamaccyparis swamp 

 would have been but it definitely disposed of the tradition that Thuja 

 does not grow in Nova Scotia. The belt of cedar is only a few yards 

 wide, extremely localized, and it is probable that morainal material 

 at that point, derived from the basaltic Digby Neck to the north, 

 would account for this localized colony of Thuja in a dominantly 

 acid region. 



The lower peaty and gravelly margin and beach of the lake had 

 the usual plants of the lake-shores: Carex lenticidaris, Lobelia Dort- 

 iiunnia, Eriocaulon septan gularc, Isoetcs sp., Panicum spretum, Grati- 

 ola aurea, etc., with Botrychiim simplex forming a characteristic 

 little patch at one point in the dry gravel ; trees of the coastal plain 

 Acer rvbrum, var. trident mingled with the common northern form 

 of the species; and abundant in the gravel were great colonies of 

 a pale-pink Pogonia ophioglossoides with the perianth not expanding 

 as it does in the plant of bogs. Upon digging specimens we found 

 that this characteristic gravel-beach plant is almost cespitose, the 

 root-fibres extensively creeping and sending up at frequent intervals 

 oblong leaves or flowering stems. Closer examination showed the 

 lip to have no beard such as is conspicuous on the lip of the common 

 bog plant or to have the beard represented only by extremely short 

 processes; but, although we often found the plant at other lakes, 

 there were transitional tendencies which show that it is only varie- 

 tally separable. 



The next day, July 12, after getting the Cedar Lake collection 

 cared for and the presses in order, there was time for a short after- 

 noon's collecting, so Long and Pease walked eastward to Arcadia, 

 Linder and I south to the salt marshes and gravel beaches at Sand 

 Beach. Puccinellias were in their prime, tantalizingly variable in 

 stature and aspect, from 1.5 dm. to practically 1 m. tall, with dense 

 or lax inflorescences but in technical characters all referable to P. 

 maritima, the species already collected at Digby, common on Cape 

 Cod, but in Maine unknown east of Casco Bay. Agropiiron, too, 

 ;is on the coast of New England and about the Gulf of St. Lawrence, 

 was perplexingly variable and the group surely needs a master's 

 hand, for altogether too many plants, both native and introduced, 

 are passing under the blanket-name A. re pens. A very pretty white- 

 flowered form of the Sea Lungwort or Oyster-plant, Mertenria maru 



