110 Rhodora [June 
present very unusual Piedmont extensions, following the course of 
a large river.! 
ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA. 
SOME NOTEWORTHY MATINICUS PLANTS. 
C. A. E. Lona. 
DuniNa the past two years I have employed a certain amount of 
my leisure in the study and collection of the plants of this island, 
and I find many interesting species growing here, both indigenous 
and introduced. From among them I am sending an account of a 
few which may be of interest to readers of RHODORA. 
AvENA FATUA L. I have found this growing for three successive 
seasons in the same location, increasing in numbers each season. It 
is in a waste corner of a dooryard. Rare in New England. 
ATHYRIUM ANGUSTUM (Willd.) Presl, var. LAURENTIANUM Butters. 
This is the extreme northeastern form of our lady fern and is here 
found somewhat south of its previously known limits. It is moder- 
ately abundant in an extensive swampy tract overgrown with Alder, 
Betula lutea, Amelanchier, Lonicera, Acer rubrum, ete., while our 
more common var. rubellum frequents the heavier and somewhat 
drier woods. 
TRIGLOCHIN PALUSTRIS L. Growing on the extreme southwestern 
end of the island in sand, along with Glaux maritima, Potentilla paci- 
1 Prof. Fernald and Dr. Pennell inform me that there are no specimens from either 
Staten Island or Long Island at the Gray Herbarium or the New York Botanical 
Garden, respectively. This additional absence in well known Coastal Plain areas, 
together with the apparent lack of the species in Connecticut and the adjacent Coas- 
tal Plain associations of southern New England, as indicated by Prof. Fernald in his 
recent paper, at once directs attention to the great body of the southern Coastal Plain, 
and here the species is completely absent—a fact apparently not very generally re- 
cognized. This absence in the southern Coastal Plain was first suggested by the 
lack of material in the Philadelphia Academy Herbarium and later corroborated by 
Prof. Fernald at Cambridge and Dr. Pennell at New York. The most southeasterly 
stations are in the southern Alleghanies—Blowing Rock, Roan Mountain, etC. In 
view of a recent, surprising statement in the Flora of the District of Columbia and 
Vicinity that G. Andrewsii and G. Saponaria intergrade and are doubtfully distinct, 
it is of interest to find that G. Andrewsii is essentially absent from the Coastal Plain 
while G. Saponaria is a most characteristic type of that area, extending but rarely 
back into the Piedmont. 
